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Using a three or more terminal semiconductive device as the final control device

Subclass of:

323 - Electricity: power supply or regulation systems

323304000 - SELF-REGULATING (E.G., NONRETROACTIVE)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
323312000 For current stabilization 312
Entries
DocumentTitleDate
20110175590ELECTRICAL POWER SUPPLY APPARATUS CONTROLLING METHOD AND DISCHARGING METHOD FOR USING THE SAME - Disclosed is an electrical power supply apparatus, comprising a switch circuit; an output circuit connected to an external power source for outputting electrical power primarily; a standby circuit connected to the external power source for outputting standby power; a discharge circuit connected between the output circuit and the external power source, to form a discharge path; and a control circuit, connected to the external power source, being capable of conducting the switch circuit for transferring a power signal of the external power source to the output circuit in a normal mode, being capable of cutting off the switch circuit for transferring a first or a second period of the power signal to the standby circuit in a standby mode, and being capable of conducting the discharge circuit for allowing the electrical power supply apparatus to discharge via the discharge circuit as the external power source is being removed.07-21-2011
20130027017VOLTAGE TO CURRENT CONVERTING CIRCUIT - A converting circuit for receiving an input voltage and generating an output current, including: a transistor, coupled to a supply voltage at a drain of the transistor, and a source of the transistor is coupled to a first voltage, and a gate of the transistor is coupled to the input voltage and a fixed voltage; and a resistor, coupled to the input voltage and the gate of the transistor, and the output current flows through the resistor, wherein the output current is related to the fixed voltage, the input voltage and the resistor.01-31-2013
20120200281Three-Dimensional Power Supply Module Having Reduced Switch Node Ringing - A high frequency power supply module (08-09-2012
20090206818AC VOLTAGE REGULATION SYSTEM AND METHOD - Control of the RMS AC voltage applied to the load (Motor) utilizes a switching device (SCR) such as a SCR in series between the load and a power source. A controller (lPController) including a processor and an analog to digital converter is connected to the line voltage and floats at line voltage and detects line voltage cross-over ad the voltage drop across the SCR. Abrupt voltage increases in the voltage across the SCR are used to replace the prior art zero current cross-over to permit the calculation of corrective timing to switch the SCR on at the succeeding voltage wave.08-20-2009
20110181266SWITCHING POWER SUPPLY CIRCUIT - There is provided a switching power supply circuit which receives a voltage from a direct current voltage source and supplies a direct current power to a load part. The circuit includes a switching element, a current detection circuit which is serially connected to the switching element, and which converts a current flowing in the switching element into a voltage, a control circuit which outputs a switch driving signal to control an ON/OFF operation of the switching element such that a current flowing in the load part becomes constant, a reference voltage generation circuit which generates a reference voltage proportional to an ON duty of the switch driving signal, and an error amplification circuit which outputs error information between a voltage output from the current detection circuit and the reference voltage. The control circuit adjusts the ON duty of the switch driving signal based on the error information.07-28-2011
20130027016STANDARD CELL CIRCUIT, SEMICONDUCTOR INTEGRATED CIRCUIT, AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A standard cell circuit including an input terminal to which input an input signal is input; an output terminal to output an output signal; a first wiring conductor, connected to an external power supply that outputs a first power supply voltage; a second wiring conductor to supply a second power supply voltage that is lower than the first power supply voltage; a standard cell to operate at the second power supply voltage supplied from the second wiring conductor; and a conversion circuit, connected to the first wiring conductor and the second wiring conductor, to convert the first power supply voltage input from the first wiring conductor into the second power supply voltage for output to the second wiring conductor.01-31-2013
20090195235DRIVE CIRCUIT AND METHOD OF USING THE SAME - A drive circuit may include a SUPPLY that outputs a first voltage potential, an energy storage device that outputs a second voltage potential, and a LOAD. Switches control the flow of current through the LOAD in a flow direction or in a direction opposite to the flow direction. The first or second voltage potentials can produce current.08-06-2009
20120169318LOAD DRIVING DEVICE - The source of FET is connected to a battery voltage +V through a fuse, while the drain of FET is connected to an electric load. The gate of FET is connected to the connection node of a capacitor and a resistor of a serial circuit configured with the capacitor the resistor. The serial circuit is connected in series with FET. The source and drain of FET are connected to both ends of the capacitor. The gate of FET is connected to the connection node of resistors. The resistor is connected to FET.07-05-2012
20100164464POWER DISTRIBUTOR AND SEMICONDUCTOR DEVICE HAVING THE SAME - A power distributor includes a large reservoir capacitor, a switch coupled between at least one power supply line and the large reservoir capacitor, and a controller configured to turn on or off the switch based on whether a circuit block connected to the power supply line is in operation or not.07-01-2010
20130076329Equalization circuit and equalization system - An equalization circuit, includes a first input terminal, a second input terminal, a first output terminal, a second output terminal, a first regulating circuit, a second regulating circuit, and a bias voltage generating circuit. The bias voltage generating circuit is connected with both the first regulating circuit and the second regulating circuit. The first regulating circuit includes a first field effect transistor (FET), a second FET, a third FET, a fourth FET, a first resistor connected with the first FET, a second resistor connected with the second FET, a third resistor connected with the third FET, a fourth resistor connected with the fourth FET, a fifth resistor connected with the third FET, a sixth resistor connected with the fourth FET, a first capacitor connected with the third FET, and a second capacitor connected with the fourth FET. An equalization system is further provided.03-28-2013
20130076330POWER CONVERTER - A power converter includes a control circuit provided with a set signal generator, a current command generator, a reset signal generator, a drive signal generator, and a pulse-width limiter. The set signal generator generates a set signal at every predetermined cycle. The current command generator generates a current command based on an output voltage command and an output voltage. The reset signal generator generates a reset signal based on an input current and the generated current command. The drive signal generator generates a drive signal which turns on in synchronisation with the generated set signal to turn on a switching element and which turns off in synchronization with the subsequently generated reset signal to turn off the switching element. The pulse-width limiter limits a pulse-width of the drive signal according to an input voltage and the output voltage, or according to the input voltage and the output voltage command.03-28-2013
20130033250POWER-UP INITIAL CIRCUIT - A power-up initial circuit includes a power-up control unit, a first switch and a second switch. The power-up control unit is used for receiving a high voltage start-up signal, and generating a first power-up control signal. The first switch has a first terminal for receiving an external voltage, a second terminal for coupling to the power-up control circuit for receiving the first power-up control signal, and a third terminal. The second switch has a first terminal coupled to the third terminal of the first switch, a second terminal for coupling to the power-up control circuit for receiving the first power-up control signal, and a third terminal for coupling to a high voltage generator.02-07-2013
20130043858MAXIMUM POWER POINT TRACKING CIRCUIT GENERIC TO A VARIETY OF ENERGY HARVESTER DEVICES - A maximum power point tracking circuit for an energy harvester device, the tracking circuit requiring nanoampere current in a standby mode, includes a maximum power point circuits utilizing a predetermined fraction of the open circuit input voltage to determine the maximum power point for energy harvester device. A circuit determines the predetermined fraction of the open circuit voltage of the energy harvester device. A sample and hold circuit measures and holds him the predetermined fraction of the open circuit voltage of the energy harvester device for use by the maximum power point circuit02-21-2013
20130043857HYSTERETIC CHARGER FOR ENERGY HARVESTER DEVICES - A hysteretic converter includes an inductor coupled between a source of voltage and a switch node. A low side switch is coupled between the switch node and a reference voltage. A high side switch is coupled between the switch node and the output of the converter. A driver controls the low side and high side switches, wherein the low side switch is turned on until the input current rises to a predetermined set point, the predetermined setpoint can be adapted to input current from the source of voltage.02-21-2013
20130038316POWER LOSS CONTROL METHOD FOR METAL-OXIDE-SEMICONDUCTOR UNIT AND ASSOCIATED APPARATUS - A power loss control method comprises detecting a load condition of the MOS unit, and adjusting driving loss of the MOS unit based on the load condition. The driving loss of the MOS unit is configured to decrease when the MOS unit is at light load condition.02-14-2013
20130038315VOLTAGE GENERATOR - A voltage generator includes a controllable voltage divider, a pull-up circuit and a first pull-down circuit. The controllable voltage divider is utilized for generating an output voltage at an output node of the controllable voltage divider according to a first reference voltage, a second reference voltage, and a control signal, wherein the second reference voltage is lower than the first reference voltage. The pull-up circuit is coupled to the output node of the controllable voltage divider and the first reference voltage, and is utilized for selectively connecting the first reference voltage to the output node of the controllable voltage divider. The first pull-down circuit is coupled to the output node of the controllable voltage divider and the second reference voltage, and is utilized for selectively connecting the second reference voltage to the output node of the controllable voltage divider.02-14-2013
20100066341POWER CONVERTER - A power converter includes an input unit, an output unit, first and second capacitors connected in series, a first electric conduction control device, a second electric conduction control device, a third electric conduction control device, and a fourth electric conduction control device, and a control circuit for performing on/off control on those electric conduction control devices. The first electric conduction control device and the fourth electric conduction control device have a first path through which a current flowing between the input unit and the output unit is allowed to flow in one direction, and a second path which has a switch function of allowing the current flowing between the input unit and the output unit to flow through or shutting off such a current.03-18-2010
20090302821CIRCUIT AND METHOD FOR OPERATING A CIRCUIT - A circuit and method for operating a circuit is provided that includes a circuit section that has a number of memory elements, a first voltage regulator that can be connected or is connected to the circuit section in order to operate the circuit section, a second voltage regulator that can be connected or is connected to the circuit section in order to preserve an information item stored in the memory elements, a switching device that is connected to the circuit section and is designed to deactivate and activate inputs of the circuit section. The circuit being configured to control a deactivation and activation of the first voltage regulator and the deactivation and activation of the inputs of the circuit section.12-10-2009
20120217949DC VOLTAGE BOOSTER APPARATUS - A DC voltage booster apparatus includes a booster coil, a first capacitor, a switching device, and a second capacitor. The booster coil includes a first end and a second end. The first end of the booster coil is connected to a DC power supply source. The second end of the booster coil is connected to a rectifier diode. The first capacitor is connected between the rectifier diode and a ground. The first capacitor includes a smoothing capacitor. The switching device is disposed between the second end of the booster coil and the ground. The second capacitor is connected in parallel with the rectifier diode.08-30-2012
20120293153ELECTRIC POWER SUPPLY AND RELATED METHODS - Some embodiments include an improved electric power supply. Other embodiments of related systems and methods are disclosed.11-22-2012
20100127687Programmable Voltage Reference - A programmable voltage reference includes a temperature compensated current source and a voltage reference circuit. The temperature compensated current source includes an output configured to provide a reference current. The voltage reference circuit includes an input coupled to the output of the temperature compensated current source and a reference output. The voltage reference circuit includes a self-cascode metal-oxide semiconductor field-effect transistor structure that includes a first device that is diode-connected and operates in a weak inversion saturation region and a second device that operates in a weak inversion triode region. A length of the second device is selectable. The voltage reference circuit is configured to provide a reference voltage on the reference output based on the reference current.05-27-2010
20130063121SHORT-CIRCUIT PROTECTION CIRCUIT AND DC-DC CONVERTER - The short-circuit protection circuit includes a first logic circuit that outputs the first logic signal so as to turn off the fourth MOS transistor in a case where the first gate voltage signal has a value that turns on the first MOS transistor and the switching terminal has a terminal voltage between a predetermined first threshold value and the second potential. The short-circuit protection circuit includes a first detecting circuit that compares a first detected voltage between the second end of the first resistor and the first end of the third MOS transistor with a predetermined first reference voltage and outputs, in a case where the first detected voltage is closer to the second potential than the first reference voltage, a first detection signal indicating that the switching terminal and the second potential are short-circuited.03-14-2013
20130063120POWER SWITCH RELIABILITY IN SWITCHED CAPACITOR DC-DC CONVERTER - Representative implementations of devices and techniques minimize hot carrier stress in a switched capacitor dc-dc converter. Multi-switch arrangements may be used in conjunction with a timing scheme to stage power switch operation.03-14-2013
20130162236Energy Harvest System and the Method Thereof - The present disclosure discloses an energy harvest system converting an AC source provided by an energy harvester to a desired voltage. The AC source is boosted to the desired voltage by a bi-directional booster converter comprising fourth controllable transistors configured in an H-bridge, and stored by a storage capacitor. The desired voltage is then used to power various loads.06-27-2013
20090237062Single-chip common-drain JFET device and its applications - A single-chip common-drain JFET device comprises a drain, two gates and two source arranged such that two common-drain JFETs are formed therewith. Due to the two JFETs merged within a single chip, no wire bonding connection is needed therebetween, thereby without parasitic inductance and resistance caused by bonding wire, and therefore improving the performance and reducing the package cost. The single-chip common-drain JFET device may be applied in buck converter, boost converter, inverting converter, switch, and two-step DC-to-DC converter to improve their performance and efficiency. Alternative single-chip common-drain JFET devices are also provided for current sense or proportional current generation.09-24-2009
20130134957VOLTAGE GENERATION CIRCUIT - A voltage generation circuit according to one embodiment includes a first booster circuit configured to generate a first voltage having a first voltage value, and a second booster circuit group including a plurality of second booster circuits, each second booster circuit configured to generate a second voltage having a second voltage value. The second booster circuits switch to be connected in series and are configured to be capable of generating the first voltage together with the first booster circuit in a change from a first state to a second state.05-30-2013
20130134959CONTROLLER - The disclosed invention provides a controller that can prevent overshoot and undershoot from occurring when a voltage is switched to another voltage without using two types of regulators. Voltage regulators supply a power supply voltage to a CPU. An SVID interface receives a command to change the number of voltage regulators to be actuated among the voltage regulators from outside. A phase clock generating circuit makes a stepwise change of the number of voltage regulators to be actuated from the current number of regulators to the commanded number of regulators after change.05-30-2013
20120235665METHOD FOR OBTAINING INFORMATION ENABLING THE DETERMINATION OF A CHARACTERISTIC OF A POWER SOURCE - The present invention concerns an apparatus for obtaining information enabling the determination of a characteristic like the maximum power point of a power source, characterised in that the apparatus for obtaining information enabling the determination of the characteristic of the power source comprises means for monitoring the voltage on an inductor linked to the power source in order to obtain information enabling the determination of the characteristic of the power source.09-20-2012
20120235664VOLTAGE CONVERTERS WITH REDUCED OUTPUT FREQUENCY VARIATIONS AND ASSOCIATED METHODS - Switch-mode voltage converters and associated methods are disclosed herein. In one embodiment, a switch-mode voltage converter includes a switching transistor coupled between an input voltage (V09-20-2012
20120235663SEMICONDUCTOR DEVICE INCLUDING A CIRCUIT TO COMPENSATE FOR PARASITIC INDUCTANCE - A semiconductor device includes a first transistor, a second transistor coupled in parallel with the first transistor, and a first parasitic inductance between an emitter of the first transistor and an emitter of the second transistor. The semiconductor device includes a first circuit configured to provide a first gate driver signal to the first transistor based on a common driver signal and a second circuit configured to provide a second gate driver signal to the second transistor based on the common driver signal. The first circuit and the second circuit are configured to compensate for a voltage drop across the first parasitic inductance such that the first gate driver signal and the second gate driver signal are in phase with and at the same magnitude as the common driver signal.09-20-2012
20110304310Multivibrator circuit and voltage converting circuit - The present disclosure provides a multivibrator circuit including: a first field effect transistor; a second field effect transistor; a first resistance; a second resistance; a third resistance; a fourth resistance; a first capacitor; a second capacitor; a diode-connected third field effect transistor; and a diode-connected fourth field effect transistor.12-15-2011
20130015833AUTOMATIC POWER CONVERTER BYPASSAANM George; Mark StevenAACI WilsonvilleAAST ORAACO USAAGP George; Mark Steven Wilsonville OR USAANM Bernards; Charles LawrenceAACI Lake OswegoAAST ORAACO USAAGP Bernards; Charles Lawrence Lake Oswego OR US - A power converter includes a bypass circuit connected in parallel with a power stage of the power converter. The bypass circuit provides a lower loss current path in parallel with the power stage when an input voltage of the power converter exceeds a predetermined threshold. The power converter may be a boost power converter used in a vehicle to provide power from a main power bus of the vehicle to a subsystem of the vehicle such as an anti-lock brake system.01-17-2013
20120112728REDUCED PARTS COUNT ISOLATED AC CURRENT SWITCHING AND SENSING - An appliance's control and sensing circuit selectively applies AC electrical power to a load (05-10-2012
20110279105MICROCOMPUTER AND SWITCHING POWER SUPPLY DEVICE - The present invention provides a switching power supply device that is capable of steadily operating even when a low supply voltage is employed. The present invention also provides a microcomputer equipped with the switching power supply device. A switching regulator includes an inductor that inputs an external supply voltage at one end, a main switch that is coupled to another end of the inductor, an auxiliary switch that is coupled to the other end of the inductor in parallel with the main switch, and a rectifying/smoothing circuit having a diode and a capacitor. A switching operation of the main switch is controlled by a control signal generated from a PFM control circuit, which is driven by an internal supply voltage. A switching operation of the auxiliary switch is controlled by a control signal generated from a ring oscillator, which is driven by the external supply voltage.11-17-2011
20080278137CIRCUITS AND METHODS TO PRODUCE A VPTAT AND/OR A BANDGAP VOLTAGE - Provided herein are circuits and methods to generate a voltage proportional to absolute temperature (VPTAT) and/or a bandgap voltage output (VGO). A circuit includes a group of X transistors. A first subgroup of the X transistors are used to produce a first base-emitter voltage (VBE11-13-2008
20130162237Energy-based Oriented Switching Mode Power Supply - An energy-based oriented switching mode power supply includes a bi-directional converter having an energy input and a load output, and an energy based pulsed generator connected between the energy input and the load output for outputting a gate voltage signal controlling how much energy is supplied from the energy input. The energy based pulsed generator receives a clock signal and outputs the gate voltage signal according to the load output of the bi-directional converter when the clock signal is at a high level. Accordingly, the switching mode power supply achieves a hybrid of PWM and PFM, depending on the energy demand of the load output, for a fast transient response and a small voltage ripple whilst improving power efficiency over a wide load range.06-27-2013
20090309568Power supply circuit and control method of the same - A power supply circuit is provided which includes a first booster to boost a power supply voltage supplied from a battery and generate a first boosted voltage, a second booster to boost the power supply voltage at a higher multiplication factor than the first booster and generate a second boosted voltage, a power supply selection circuit to output the first boosted voltage or the second boosted voltage, a first smoothing capacitor placed at an output end of the power supply selection circuit, and a second smoothing capacitor placed at an output end of the second booster.12-17-2009
20110291636VOLTAGE REGULATOR - Provided is a voltage regulator capable of stable operation under a light load so as to cover a wide range of load capacitances. The voltage regulator includes a circuit for charging a phase compensation capacitor for the voltage regulator, and a zero due to a resistor (12-01-2011
20110291637INCREASING THE EFFICIENCY OF A DC-DC CONVERTER - A DC-DC converter receives input power from a power source and generates a regulated DC voltage as an output. The DC-DC converter contains multiple blocks, each of which is powered by a power supply received on a supply terminal. The DC-DC converter also contains a voltage regulator to generate a lower voltage from the power source. The lower voltage generated by the regulator is provided as the power supply on the supply terminal when the regulated DC voltage is less than a reference value, and the regulated DC voltage itself is provided as the power supply on the supply terminal otherwise. The regulator is switched off when the blocks are powered by the regulated DC voltage, thereby leading to increased efficiency of the DC-DC converter.12-01-2011
20120098517High Side Switch Circuit, Interface Circuit and Electronic Device - A high side switch circuit includes a switch electrically connected between input and output terminals, a gate control unit, and an over-current sensor unit. The over-current sensor unit includes a resistive element and a comparator. The comparator senses an over-current if a voltage of the resistive element exceeds a threshold voltage. The comparator is adjusted in advance such that the detected voltage at the time of over-current exceeds the threshold voltage. Even if accuracy of resistance value of the resistive element is not high, accuracy of detecting over-current can be improved by adjusting the comparator.04-26-2012
20130214757Bootstrap Circuitry for an IGBT - A bootstrap circuit provides a gate-emitter voltage to the high-side IGBT of a half-bridge IGBT arrangement. The bootstrap circuit includes a buck-boost circuit for providing a negative gate-emitter voltage for turning the high-side IGBT off.08-22-2013
20110215787BOOSTING CIRCUIT AND RFID TAG INCLUDING BOOSTING CIRCUIT - One object is to provide a boosting circuit whose boosting efficiency is enhanced. Another object is to provide an RFID tag including a boosting circuit whose boosting efficiency is enhanced. A node corresponding to an output terminal of a unit boosting circuit or a gate electrode of a transistor connected to the node is boosted by bootstrap operation, so that a decrease in potential which corresponds to substantially the same as the threshold potential of the transistor can be prevented and a decrease in output potential of the unit boosting circuit can be prevented.09-08-2011
20110215786ON-OFF TIMER CIRCUIT FOR USE IN DC-DC CONVERTER - An ON-OFF timer circuit for use in a DC-DC converter to minimize or eliminate the risk of developing sub-harmonic oscillations that may cause the dc-dc system to be unstable is presented. The apparatus controls and limits the ‘On’ time duration and ‘Off’ time duration within one pulse cycle.09-08-2011
20090295358Driving Device - The present invention relates to a driving device. The driving device according to the present invention includes a main transistor that supplies a current to a load by using a power supply, an auxiliary transistor that drops a predetermined voltage of the voltage of the power supply and transmits the dropped voltage to the main transistor in a turn-on state, and a bypass switch that transmits the voltage of the power supply to the main transistor when the auxiliary transistor is turned off.12-03-2009
20090201005DC TO DC CONVERTER MODULE - Lower surface terminals are disposed at the lower surface of a magnetic substrate. An upper surface electrode is disposed at the upper surface of the magnetic substrate. A control circuit, an input capacitor, and an output capacitor are mounted on the upper surface electrode. The control circuit contains a switching element. A smoothing choke is disposed inside the magnetic substrate. The connection wiring of connecting the upper surface electrode and at least one of the input terminal, the output terminal, and the ground terminal is constructed using an inner conductor passing through the inside of the magnetic substrate, and the connection wiring forms an inductor.08-13-2009
20100327839DRIVING CONTROLLER AND INTERNAL VOLTAGE GENERATION CIRCUIT - A driving controller for use in stabilizing transient voltages from power supplies is presented. The driving controller includes a first pulse generator, a second pulse generator, and a control signal generator. The first pulse generator is configured to generate a power-up pulse signal including a pulse activating at a time of terminating a power-up period. The second pulse generator is configured to generate a detection pulse signal including a pulse that is being active from a time when an internal voltage reaches a predetermined level. The control signal generator is configured to generate an operation control signal, which controls a driving controller activating the internal voltage, in response to the power-up pulse signal and the detection pulse signal.12-30-2010
20110169474Step-down switching PFC converter - The step-down switching converter is provided, which promises to replace the conventional buck converter in many applications due to its many advantage, such as higher efficiency, smaller size, fast transient response and lower cost among other benefits.07-14-2011
20110062935ENERGY RECOVERY CIRCUIT - An energy recovery circuit receives and stores energy associated with switching transitions in a power converter having a first switch and a second switch configured to be operated to selectively apply a voltage source to an output load. The energy recovery circuit includes an inductive element, a diode, and a capacitive element. The inductive element receives at least a portion of electrical current flowing through one of the first switch and the second switch. The at least a portion of the electrical current flows through the diode to charge the capacitive element with a voltage. The energy recovery circuit includes a recovery power converter to transfer the voltage from the capacitor.03-17-2011
20110169475SIGNAL OUTPUT CIRCUIT - A MOSFET at an input side controls the operation of a current mirror circuit in accordance with a level change of a PWM signal applied to its gate. When the current mirror circuit operates, a current generated by a current source flows as a mirror current so that a current flows to discharge electricity charged in a capacitance between a gate and a source through a gate of a MOSFET at an output side. When the current mirror circuit stops its operation, a current flowing from the current mirror circuit through the current source is supplied to the gate of the MOSFET at the output side.07-14-2011
20090261800Voltage Protection Circuit for Thin Oxide Transistors, and Memory Device and Processor-Based System Using Same - Devices, reference voltage generators, systems and methods are disclosed, including an embodiment of a voltage regulator output transistor using a thin gate insulator to provide a low output impedance despite having a semiconductor channel width that is relatively small. The output transistor is protected from damage by a clamping circuit provided to limit the gate-to-source voltage of the transistor such that damage to the output transistor should be reduced or prevented. One such clamping circuit includes a clamp transistor that receives a reference voltage at its gate. The magnitude of the reference voltage limits to voltage to which the gate of the transistor can be driven. A voltage reference circuit provides the reference voltage so that it compensates for process and temperature variations of the output transistor.10-22-2009
20120293152Boost Converter - A boost converter is disclosed in the present disclosure. The boost converter includes a switching element, a first diode, a second diode, a first inductor, a second inductor, a DC voltage input terminal and a DC voltage output terminal. The first inductor, the second inductor and the second diode are connected in sequence between the DC voltage input terminal and the DC voltage output terminal. The second diode has an anode connected to the second inductor and a cathode connected to the DC voltage output terminal. The switching element includes a first end, a second end and a third end for controlling connection or disconnection between the first end and the second end. The first end is connected between the first and the second inductor. The boost converter of the present disclosure is convenient to use and features high inductance coupling efficiency.11-22-2012
20130099768CONTROL CIRCUIT AND ELECTRONIC APPARATUS USING THE SAME - A control circuit includes: a first switching device that includes a source, a gate, and a drain; a negative voltage generating circuit that generates, from a pulse width modulation signal that controls the gate of the first switching device, a negative potential voltage which is equal to or smaller than a threshold of the first switching device; a gate control circuit that outputs a signal obtained by shifting a level of the pulse width modulation signal by an amount equal to the negative potential voltage to the gate of the first switching device; a second switching device that is disposed on a side of the drain of the first switching device; and a negative voltage detecting circuit that outputs a signal for turning ON the second switching device upon detecting that the negative potential voltage generated by the negative voltage generating circuit has reached a predetermined negative potential.04-25-2013
20120293151COMPLEMENTARY METAL-OXIDE SEMICONDUCTOR DIRECT CURRENT TO DIRECT CURRENT CONVERTER - Disclosed embodiments include a direct current to direct current (DC-DC) converter including one or more charge pumps and configured to receive an input voltage and a first clock signal and a second clock signal. The first clock signal and second clock signal may be non-overlapping, and each may alternate between a ground voltage and a first voltage. The DC-DC converter may be configured to produce an output voltage over the clock cycle that has a negative polarity with a magnitude substantially equal to a sum of magnitudes of the input voltage and an integer multiple of the first voltage, the integer multiple being equal to a number of the one or more charge pumps in the DC-DC converter.11-22-2012
20120091986SEMICONDUCTOR DEVICE AND POWER SUPPLY APPARATUS - A semiconductor device includes a first transistor including a GaN-based semiconductor stacked structure formed over a substrate, a first gate electrode having a plurality of first fingers over the semiconductor stacked structure, a plurality of first drain electrodes provided along the first fingers, and a plurality of first source electrodes provided along the first fingers; a second transistor including the semiconductor stacked structure, a second gate electrode having a plurality of second fingers over the semiconductor stacked structure, the second drain electrodes provided along the second fingers, and a plurality of second source electrodes provided along the second fingers; a drain pad provided over or under the first drain electrodes, and coupled to the first drain electrodes; a source pad provided over or under the second source electrodes, and coupled to the second source electrodes; and a common pad coupled to the first source electrodes and the second drain electrodes.04-19-2012
20080309307High Voltage Power Switches Using Low Voltage Transistors - A switching regulator having first and second power switches. The first power switch has at least two transistors connected in series, the transistors having a first maximum voltage across their terminals which is less than the input voltage of the regulator. The transistors have at least a first node at the point where they are connected, and a first control circuit controls the voltage at the first node so that the voltages across the terminals of the transistors of the first power switch do not exceed the first maximum voltage. The second power switch also has at least two transistors connected in series, the transistors having a maximum voltage across their terminals that is less than the input voltage. The transistors have at least a second node at the point where they are connected, and a second control circuit controls the voltage at the second node so that the voltages across the terminals of the transistors of the second power switch do not exceed the second maximum voltage.12-18-2008
20100201340LOW-SWING DIFFERENTIAL SIGNAL OUTPUT DRIVER WITH WIDE-RANGE SUPPLY VOLTAGE OPERABILITY - According to one general aspect, an output driver configured to drive output signals from a core device may include a voltage convertor, an output stage, and a biasing unit. In various embodiments, the output driver is configured to operate in either a core device voltage mode or a high voltage mode. In some embodiments, the voltage convertor may be configured to receive a pair of differential input signals from a core device, wherein a maximum voltage of the input signals is equivalent to a core device voltage, and convert the input signals to a pair of intermediate input signals. In one embodiment, when in high voltage mode, the maximum voltage of the intermediate input signals may be equivalent to a high voltage that is higher than the core device voltage. In some embodiments, the output stage configured to receive the intermediate input signals, and produce a pair of differential output signals having a maximum voltage of, based upon the operating mode of the output driver, either the core device voltage or the high voltage. In various embodiments, the biasing unit configured to provide a biasing current to the output stage, wherein the biasing current is configured to produce a desired common mode voltage within the output stage.08-12-2010
20100201339TEMPERATURE VARIANCE NULLIFICATION IN AN INRUSH CURRENT SUPPRESSION CIRCUIT - The temperature dependence of an inrush current suppression circuit comprising a MOSFET having an input terminal coupled to a direct current input voltage can a transistor electrically coupled to the MOSFET can be reduced by matching the temperature coefficient of a transistor to a component electrically coupled to the transistor.08-12-2010
20120105045Controlling a Skew Time of Switches of a Switching Regulator - Embodiments for methods and apparatuses for controlling a skew time of switches of a switching voltage regulator are disclosed. One method includes generating a switching voltage through closing and opening of a series switch and a shunt switch as controlled by a series switch control signal and a shunt switch control signal. An error signal is generated that is proportional to a relative displacement of an on-interval of the series switch and an off-interval of the shunt switch. A relative delay of the series switch control signal and the shunt switch control signal is adjusted based on the error signal, and a regulated output voltage is generated based upon the switching voltage.05-03-2012
20130214758STEP-DOWN DC-TO-DC CONVERTER - An inductor L08-22-2013
20090160418DC-DC CONVERTER - A DC-DC converter includes a reference voltage generation circuit. The reference voltage generation circuit generates a reference voltage for determination of the pulse width of a drive signal to be supplied to a switching circuit. The reference voltage generation circuit includes a current sensing circuit. The current sensing circuit has a first MOS transistor, a second MOS transistor, a resistive element and an amplifier circuit.06-25-2009
20120068683Current Source Gate Driver with Negative Gate Voltage - Described herein are methods and circuits for driving a power switching device of a power converter. The methods and circuits include providing a negative gate to source voltage to the power switching device during an off transition of the power switching device, wherein the negative gate to source voltage is provided independent of one or more switching element for driving the power switching device; wherein body diode conduction by the one or more switching element is mitigated; wherein a circuit connected in parallel with the gate and source of the power switching device is used to set or define the negative gate to source voltage.03-22-2012
20120068684CURRENT GENERATOR, NOTABLY FOR CURRENT OF THE ORDER OF NANO-AMPERES, AND VOLTAGE REGULATOR USING SUCH A GENERATOR - An ultra-low current generator and a voltage regulator using such a generator. The generator includes a first set of Q transistors connected as a current mirror and able to be linked to a supply voltage; a second set of Q−1 transistors connected as a current mirror and each connected in series to one of the transistors in the first set of transistors; a first transistor connected in series with a transistor in the second set of transistors; and a second transistor, connected as a current mirror with the first transistor, and connected in series with a transistor included in the first set of transistors. The first transistor operates in its linear zone, a value of a current generated by the current generator depends on an equivalent resistance of the first transistor, and the first and second transistors have ultra-long channels, with a very large length/width ratio.03-22-2012
20120068682DC TO DC VOLTAGE CONVERTER COMPRISING A CHARGE PUMP CAPACITOR - The invention relates to a DC to DC voltage converter including a charge pump capacitor (C) installed parallel to a means (03-22-2012
20120068681Integrated Circuit Package With Reduced Parasitic Loop Inductance - A multi-layer integrated circuit package includes a switched-mode power supply circuit including a plurality of transistors which form part of a main current loop of the switched-mode power supply circuit. The plurality of transistors are arranged in one or more layers of the integrated circuit package. The package further includes a conductive plate arranged in a different layer of the integrated circuit package than the plurality of transistors. The conductive plate is in close enough proximity to at least part of the main current loop so that a current can be electromagnetically induced in the conductive plate responsive to a change in current in the main current loop.03-22-2012
20090001957Electronic Voltage Supply Method and Apparatus - A method and apparatus for supplying a voltage in an information handling system. A modulated voltage signal output circuit linked to an amplitude control element. The amplitude control element linked to a voltage output circuit, the output circuit including one or more electrical energy-storage elements to receive an electrical current. The voltage output circuit having one or more electronic switches to alter the current passing to the energy-storage element(s) to provide a modulated voltage output.01-01-2009
20080315854Input/Output Regulating Circuitry with Self-Electrostatic-Discharge Protection - An I/O regulating circuitry is provided. The I/O regulating circuitry omits the ESD device in a CMOS process with a minimized critical dimension to reduce chip size while still maintaining electrostatic discharge immunity. The I/O regulating circuitry is applied in MLC flash memory applications and the flash controller thereof.12-25-2008
20110140683POWER BOOSTER FOR CABLE SYSTEMS - Device and method for regulating voltage level at section of telecommunications network, the device including an input port, which receives input RF telecommunications signal with input AC voltage from a network portion, isolating circuitry, which isolates input AC voltage, a transformer, which receives the isolated AC voltage, relays, which provide selected voltage gain by selectively switching on connection from transformer secondary winding, thereby deriving regulated AC voltage at predetermined level, control circuitry, which monitors input AC voltage and selectively activates a selected relay while deactivating other relays to provide selected voltage gain, recombining circuitry, which recombines regulated AC voltage with isolated input RF telecommunications signal, and an output port, which provides recombined regulated AC voltage and RF telecommunications signal to another network portion.06-16-2011
20110140682VOLTAGE REGULATOR SUITABLE FOR CMOS CIRCUIT - There is provided a voltage regulator suitable for a CMOS circuit. A voltage regulator suitable for a CMOS circuit according to an aspect of the invention may include: a voltage setting unit setting a voltage across both terminals of a load; a voltage amplification unit setting an input voltage; and a voltage control unit controlling a voltage to be applied to the second connection node according to an output voltage of the voltage amplification unit, wherein the voltage across both terminals of the load is maintained to be constant regardless of variations in a power voltage.06-16-2011
20110140681DIRECT DC CONVERTER (DC CHOPPER) - A DC voltage converter has a primary side and a secondary side coupled galvanically to the primary side. The primary side has at least one inductor, and the secondary side has at least two secondary capacitors connected in series. A controllable electronic switching device is situated between the primary side and the secondary side. In a first operating mode, depending on the switching position, the secondary capacitors are charged one after the other via the inductor, and the respective charging process ends approximately at the zero crossing of the respective charging current.06-16-2011
20090096438VOLTAGE CONTROL CIRCUIT - A voltage control circuit accepts an input voltage and produces a regulated output voltage. Embodiments provide improved responsiveness to variations in input voltage, load current, and ambient temperature. Exemplary embodiments include an NPN transistor connected between the input and output terminals, which is controlled by a feedback circuit. In an embodiment, the feedback circuit includes a PMOS transistor and in another embodiment the feedback circuit includes a PNP transistor.04-16-2009
20110227553LOW POWER HIGH VOLTAGE REGULATOR FOR NON-VOLATILE MEMORY DEVICE - A high-voltage regulator includes a charge pump for generating a high voltage, a voltage regulator for generating a regulated voltage, and an oscillator having an oscillation frequency. The voltage regulator includes an operational amplifier having the high voltage as power supply, a first input, a second input coupled to a voltage reference, and an output. The voltage regulator further includes a first transistor having gate coupled to the output of the operational amplifier, a first terminal coupled to the high voltage and a second terminal coupled to a first voltage divider. The first voltage divider generates a first divided voltage that is coupled to the first input of the operational amplifier. The voltage regulator also includes a second voltage divider for providing a second divided voltage, wherein the second divided voltage controls the oscillator frequency.09-22-2011
20090102449POWER SUPPLY DEVICE WITH VOLTAGE CONVERTER CIRCUIT - A power supply device with voltage converter circuit comprises a power supply device, a boost loop, a buck loop, and a control unit. The power supply device supplies power by any means. The boost loop is used to step up the voltage of power output by the power supply device. The buck loop is used to step down the voltage of power output by the power supply device. The boost loop and the buck loop are electrically connected in parallel. The control unit selects the use of boost loop or buck loop for the voltage conversion of the power supply device. The control unit monitors the power output of the power supply device and controls the action of the boost loop or the buck loop such that the power supply device would output voltage desired by the system via voltage conversion.04-23-2009
20090146636SWITCHING ELEMENT, VARIABLE INDUCTOR, AND ELECTRONIC CIRCUIT DEVICE HAVING CIRCUIT CONFIGURATION INCORPORATING THE SWITCHING ELEMENT AND THE VARIABLE INDUCTOR - An inexpensive variable inductor has inductance value continuously changeable without reducing a Q value. When a control voltage is applied to a control terminal of a MOS transistor from a power supply, a continuity region is formed in a channel, and a region between main terminals becomes conductive. When the control voltage is changed, length of the continuity region in the channel is changed. This changes length of a path area of an induced current, flowing in an induced current film. Thus, the amount of induced current is increased or decreased. Therefore, when the control voltage of the MOS transistor is changed, the inductance value of the coil is continuously changed.06-11-2009
20090251122Method for DC/DC Conversion and DC/DC Converter Arrangement - A method for DC/DC conversion which comprises the steps of controlling a first switch (10-08-2009
20120194163Reverse Power Y-Adapter - A power Y-adapter provides power at a high voltage to an output end from at least two input ends to which power of a lower voltage and a phase difference is provided and includes a first polarity sensitive current isolation device, a second polarity sensitive current isolation device, a control section, and an output section. When the voltage signals supplied to the hot wire terminals of the first input connector and the second input connector sufficiently are out of phase, the Y-adapter can produce a voltage of higher magnitude between the first and the second hot wire terminals of the output connector.08-02-2012
20110227554SEMICONDUCTOR DEVICE AND DC-DC CONVERTER - According to one embodiment, a semiconductor device includes a semiconductor layer of a first conductivity type, a base region of a second conductivity type, a diffusion region of the first conductivity type, a control electrode, at least one first semiconductor region of the second conductivity type, a second semiconductor region of the second conductivity type, a first main electrode, and a second main electrode. The base region is selectively provided in a first major surface side of the semiconductor layer. The diffusion region is selectively provided in the base region. The control electrode is provided via an insulating film in a trench being in contact with the diffusion region and penetrating through the base region to the semiconductor layer. The at least one first semiconductor region extends in the semiconductor layer from the first major surface side to a second major surface side of the semiconductor layer and is spaced from the base region. The second semiconductor region is provided between the adjacent trenches and spaced from the trenches in the base region. The first main electrode is electrically connected to the diffusion region, the semiconductor layer, the first semiconductor region, and the second semiconductor region. The second main electrode is electrically connected to the second major surface side of the semiconductor layer. The second semiconductor region penetrates through the base region to the semiconductor layer.09-22-2011
20100019754Power Converter for Solar Electrical Current Installations and Method for Controlling it - A power converter having a d.c. voltage input which varies over time and has a maximum voltage, a level converter and at least one inverter, which can be connected to an electrical network. The positive input of the d.c. voltage input is connected with a first switch and with the anode of a first diode. The negative input of the d.c. voltage input is connected with a second switch and with the cathode of a second diode. The cathode of the first diode is connected with a first capacitor, the anode of the second diode with a second capacitor. The two switches and the two capacitors are connected, and their center taps are likewise connected. This constitutes the level converter, which is connected with a downstream inverter. The two capacitors are thereby charged, independently of the input voltage, each at half the value of the set-point intermediate circuit voltage.01-28-2010
20100176785Clamp unit, and power supply having the same cross-reference to related application - A clamp unit is adapted for controlling a clamp switch of a power supply such that the power supply outputs an output voltage in an ON mode when the clamp switch is in an ON-state and that the power supply does not output the output voltage in an OFF mode when the clamp switch is in an OFF-state. The clamp unit includes: a coupling circuit for outputting a coupling voltage in response to first and second reference voltages, and a control signal outputted by a control signal generating circuit in response to an input voltage; and a detecting circuit for outputting a clamp signal to the clamp switch in response to a first signal indicating whether the power is in the ON mode or the OFF mode, and a second signal indicating whether the power supply is to output the output voltage.07-15-2010
20120032664SINGLE INDUCTOR POWER CONVERTER SYSTEM AND METHODS - Methods, systems, and devices are described for a non-isolated dc-dc power converter that uses a single magnetic element and provides both a positive and a negative voltage output. The magnetic element, such as an inductor, is coupled with two or more switching modules that electrically switch the inductor to and from a voltage source, an inductor terminal, and/or a load. By electrically connecting and electrically isolating different components at various times, separate positive and negative voltage outputs are provided using the single inductor element. Switching may be controlled by a controller module, and a magnitude of the dc output voltage may be selected based on two or more resistors coupled with the controller module.02-09-2012
20120139522CONVERTER CONTROLLER - There is disclosed a converter controller which can simply and early detect an abnormality of an auxiliary circuit constituting a soft switching converter. On turning off a first switching element, a controller detects a voltage between both the ends of a snubber capacitor and a voltage between both the ends of the first switching element, to obtain a difference voltage. The controller compares the obtained difference voltage with a voltage threshold value stored in a memory (not shown) to judge whether or not the difference voltage is larger than the voltage threshold value. When the difference voltage is smaller than the voltage threshold value, the controller judges that an auxiliary circuit is normal, to end processing, whereas when the difference voltage is not less than the voltage threshold value, the controller judges that a failure (an open failure) occurs in the auxiliary circuit, to shift to a fail safe operation, thereby ending the processing.06-07-2012
20100156381Voltage Regulating Device for Load Starting - The present invention provides a voltage regulating device for load starting, wherein the voltage regulating device comprises a voltage regulating circuit, and a switch circuit configured to be operably coupled between an output terminal of voltage regulating circuit and a load; wherein the switch circuit is configured to disconnect the voltage regulating circuit from the load when the voltage regulating circuit connects to a DC power.06-24-2010
20100225295Digital Regulator In Power Management - A method and system for controlling a plurality of output voltages.09-09-2010
20100253310EFFICIENT POWER REGULATION FOR CLASS-E AMPLIFIERS - A power converter device and method are provided. The power converter device includes an input power source and an input inductor configured for coupling a power of the input power source to the device. A switch is configured to regulate a power of the input power source through the input inductor. A shunting diode is coupled between the switch and the input inductor. A resonant load is coupled with the input inductor. A switching element is coupled with the input inductor and the resonant load and configured to operate at a fixed frequency. The power converter device also includes a control circuit for modulating a frequency of the switch and a driving module for driving the switching element at the fixed frequency. In an exemplary embodiment, the power converter device is a Class-E amplifier. The fixed frequency is a frequency equal to a resonant frequency of the resonant load. In one embodiment, the power converter device is configured as an integrated circuit device.10-07-2010
20100225296HIGH VOLTAGE AND HIGH POWER BOOST CONVETER WITH CO-PACKAGED SCHOTTKY DIODE - A high voltage and high power boost converter is disclosed. The boost converter includes a boost converter IC and a discrete Schottky diode, both of which are co-packaged on a standard single common die pad.09-09-2010
20120139521DC-DC Converter - A DC-DC converter having a first and a second switch, an input diode, a magnetizing inductor, a resonant capacitor, a resonant inductor, an output diode and an output filter capacitor. The first and second switches are turned on alternatively. When the first switch is turned on, an input voltage is coupled to an anode of the input diode that has a cathode coupled to a first terminal of the magnetizing inductor. The second switch is designed to short a second terminal of the magnetizing inductor to a ground. The resonant capacitor and inductor, which are coupled in series, are disposed between the second terminal of the magnetizing inductor and the ground. A connection node between the resonant capacitor and inductor is coupled to the output filter capacitor, via the output diode, to regulate a voltage of the output filter capacitor. The regulated voltage is used in powering a load.06-07-2012
20100237847POWER SUPPLY CIRCUIT - A power supply circuit has a first MOSFET having a body region between the source and drain. The body region is connected so as to be at the same potential as the source. Application of a suitable potential to the gate causes the MOSFET to switch to a conductive on state. The power supply circuit also has signal generation circuitry, which generates a signal indicative of a conductive state of the first MOSFET. The signal generation circuitry generates a reference voltage of a predetermined potential difference from the source potential. The power supply circuit further comprises a second MOSFET having a body region connected so as to be at the same potential as the drain of the first MOSFET, and the second gate is connected to receive the reference voltage. When the potential of the drain of the first MOSFET falls a predetermined voltage below the reference voltage the second MOSFET is switched to a conductive on state between the second source and the second drain, the signal being dependent upon the state of the second MOSFET.09-23-2010
20110057640Storageless step-down switching DC-DC converter - A storageless DC-DC converter is provided having simultaneously ultra high efficiency of 99.5% in an ultra compact size leading to 1 kW/inch03-10-2011
20110057639PASSIVE LOSSLESS SNUBBER CELL FOR A POWER CONVERTER - A passive lossless snubber cell for a switched-mode power converter comprises an energy absorbing circuit and an energy resetting circuit coupled to said energy absorbing circuit. The energy absorbing circuit is arranged to release energy stored in a snubber capacitor of the energy absorbing circuit to a storage capacitor of the energy resetting circuit through a resonant pathway of the snubber cell in response to a first switching action of a power converter transistor switch. The energy resetting circuit is arranged to release the energy stored therein to a part of a circuit of the power converter in response to a second switching action of the power converter transistor switch, the second switching action being a successive action to the first switching action. The passive lossless snubber cell has several advantages over existing snubbering techniques. First, it provides zero-current-switching (ZCS) and zero-voltage-switching (ZVS) conditions for turning on and off, respectively, the switch over a wide load range. Second, it does not introduce extra voltage stress on the switch. Third, by taking the ripple current through the switch into account, the peak switch current during the snubber resonance period is designed to be less than the designed switch current without the snubber. Hence, the proposed snubber does not introduce extra current stress on the switch.03-10-2011
20110031954Driving power-supply circuit - The object of the present invention is reducing power consumption of a driving power supply circuit. In the case where the driving voltage Vi is higher than the reference voltage ViH, The signal S02-10-2011
20110031952SEMICONDUCTOR APPARATUS AND POWER SOURCE CIRCUIT - According to one embodiment, a semiconductor apparatus includes a substrate, a semiconductor layer of a first conductivity type, a first semiconductor region of a second conductivity type, a first main electrode, a second semiconductor layer of the second conductivity type, a third semiconductor layer of the first conductivity type, a second main electrode, a gate insulating film, and a gate electrode. An electron injected from the first semiconductor region into the semiconductor layer is recombined with an electron hole injected from the third semiconductor region into the semiconductor layer in a state of a body diode is biased in a forward direction. The body diode includes the semiconductor layer, the first semiconductor region, and the third semiconductor region.02-10-2011
20110031953ENVELOPE TRACKING POWER SUPPLY CIRCUIT AND HIGH-FREQUENCY AMPLIFIER INCLUDING ENVELOPE TRACKING POWER SUPPLY CIRCUIT - The invention aims to maintain a high efficiency even for a high-frequency signal having a wideband envelope. The envelope tracking power supply circuit 02-10-2011
20100320992Buck-Boost Converter With Sample And Hold Circuit In Current Loop - In an average-current mode control type buck-boost PWM converter, a sample and hold circuit is inserted in the current loop to avoid problems associated with ripple of the average inductor current demand signal. The rippling average inductor current is generated by a differential transconductance amplifier having applied to its inputs an error signal and a signal corresponding to the instantaneous current through the inductor, where the output of the amplifier is filtered. The rippling average inductor current is sampled and held at the beginning of each switching cycle, prior to the average inductor current demand signal being compared to buck and boost sawtooth waveforms. By using the sample and hold circuit, the feedback loops are easier to stabilize, and the converter cannot switch modes during a switching cycle.12-23-2010
20110121808VOLTAGE CONVERTER AND SYSTEMS INCLUDING SAME - A voltage converter includes an output circuit having a high side device and a low side device which can be formed on a single die (i.e. a “PowerDie”) and connected to each other through a semiconductor substrate. Both the high side device and the low side device can include lateral diffused metal oxide semiconductor (LDMOS) transistors. Because both output transistors include the same type of transistors, the two devices can be formed simultaneously, thereby reducing the number of photomasks over other voltage converter designs. The voltage converter can further include a controller circuit on a different die which can be electrically coupled to, and co-packaged with, the PowerDie.05-26-2011
20110001463Transceiver for Controlling Swing Width of Output Voltage - A transceiver for controlling a swing width of an output voltage includes a transmitter and a receiver for receiving an output voltage of a transmitter. The transmitter includes a first signal converter that outputs changed data generated by changing a voltage level of data in response to a mode control signal for selecting a test mode or a normal mode, an output voltage control circuit for controlling a voltage level of an output node of the transmitter in response to the changed data, and a first termination circuit for supplying a changed power supply voltage generated by changing a voltage level of a power supply voltage of the output node of the transmitter, or is turned off, in response to a test mode enable signal or the changed data. The receiver includes a second termination circuit that operates as a resistor having a resistance value that varies in response to the test mode enable signal or a test mode disable signal.01-06-2011
20110018520REFERENCE VOLTAGE CIRCUIT AND ELECTRONIC DEVICE - In order to realize a reference voltage circuit that operates with lower current consumption while maintaining an operation at lower voltage without causing deterioration of a power supply rejection ratio, provided is a reference voltage circuit in which a depletion transistor of an ED type reference voltage circuit is constituted of a plurality of depletion transistors connected in series, and in which a gate terminal of a cascode depletion transistor is connected to a connection point between the depletion transistors of the ED type reference voltage circuit.01-27-2011
20110018521METHOD AND DEVICE FOR INCREASING CONTROL ACCURACY IN A PWM SYSTEM - A method and a device for operating a bridge power supply circuit comprising at least two switch members connected in series between two rails and operated alternatingly to provide a pulse width modulated output signal at a junction between the two transistors. A measurement circuit measures a voltage drop over the lower switch member during conduction of said switch member. The measurement is performed approximately in the middle of the ON-period and is used in the next cycle for calculating the timing signals. A control signal (Ucontrol) is received at an input for the pulse width modulated output signal. The measured voltage drop is added to the control signal before calculating the timing signals. The voltage drop is scaled by a scaling factor of for example 0.8 before being added to the control signal.01-27-2011
20090066311PRE-CONDITIONER WITH LOW VOLTAGE COMPONENTS - A pre-conditioner circuit comprising first and second pre-conditioner modules (03-12-2009
20110109295SEMICONDUCTOR DEVICE AND DC-DC CONVERTER - According to one embodiment, a semiconductor device includes a first switching element and a second switching element. The first switching element has a first threshold voltage and a first gate electrode connected to a first gate wiring. The second switching element has a second threshold voltage and a second gate electrode connected to a second gate wiring. The second threshold voltage has a larger absolute value than the first threshold voltage. The second gate wiring has a larger resistance per unit length than the first gate wiring.05-12-2011
20110025290DC Power Converting Circuit and Method Thereof - A direct current (DC) converting circuit includes a DC input end, for receiving a DC input voltage; a DC output end, for providing a predetermined DC voltage; a switch, coupled between the DC input end and the DC output end, for providing a direct path; a DC-DC step-down unit, coupled between the DC input end and the DC output end, for providing a step-down voltage path; and a control unit, coupled to the switch and the DC-DC step-down unit, for detecting the DC input voltage and selecting either the direct path or the step-down voltage path to provide the predetermined DC voltage at the DC output end. The DC power converting circuit can be applied in power supply circuits of multi-media players or TV setup boxes to convert DC input voltage including 5V, 9V or 12V DC voltages to a predetermined DC voltage.02-03-2011
20110037449SEMICONDUCTOR DEVICE - A non-insulated DC-DC converter has a power MOS-FET for a highside switch and a power MOS-FET for a lowside switch. In the non-insulated DC-DC converter, the power MOS-FET for the highside switch and the power MOS-FET for the lowside switch, driver circuits that control operations of these elements, respectively, and a Schottky barrier diode connected in parallel with the power MOS-FET for the lowside switch are respectively formed in four different semiconductor chips. These four semiconductor chips are housed in one package. The semiconductor chips are mounted over the same die pad. The semiconductor chips are disposed so as to approach each other.02-17-2011
20110115461Semiconductor circuit device and data processing system - Occurrence of power supply noise arising in connection with a step-down action at the time of turning on power supply is to be restrained. A step-down unit is provided with a switched capacitor type step-down circuit and a series regulator type step-down circuit, and stepped-down voltage output terminals of the step-down circuits are connected in common. The common connection of the stepped-down voltage output terminals of both step-down circuits makes possible parallel driving of both, selective driving of either or consecutive driving of the two. In the consecutive driving, even if the switched capacitor type step-down circuit is driven after driving the series regulator type step-down circuit first to supply a stepped-down voltage to loads, the switched capacitor type step-down circuit will need only to be compensated for a discharge due to the loads, and a peak of a charge current for capacitors can be kept low. When operation of the switched capacitor type step-down circuit is started, no large rush current arises, and occurrence of noise is restrained.05-19-2011
20110080153Circuit And Method For Generating A Reference Voltage - A circuit for generating a reference voltage includes a first transistor configured to receive a reference system voltage, the first transistor configured as a current source, the first transistor configured to provide a current independent of the system voltage, a plurality of diode devices configured to receive the current provided by the first transistor, and a second transistor associated with the plurality of diode devices, the second transistor configured to compensate for process variations in the first transistor, such that the plurality of diode devices provides a reference voltage that is at least partially compensated for the process variations.04-07-2011
20110210713POWER CONVERSION APPARATUS AND CONTROL METHOD FOR POWER CONVERSION APPARATUS - A power conversion apparatus includes: a MOSFET (09-01-2011
20110175592BUS DRIVER FOR AVOIDING AN OVERVOLTAGE - An electrical circuit for manipulating at least one of a voltage and a current on a bus wire comprises a first switch having a first gate, a first source, and a first potential reduction unit. The first potential reduction unit is suitable for lowering a potential difference between the first gate and the first source of the first switch, wherein the lowering of the potential difference is caused by a shutting-off of a first control voltage.07-21-2011
20110175591Step-down low ripple switching converter - The step-down switching converter is provided, which promises to replace the conventional buck converter in many applications due to its many advantage, such as higher efficiency, smaller size, fast transient response and lower cost and ultra low output ripple voltage among other benefits.07-21-2011
20110101953Control Device and Switching Power Supply - A control device for a switching power supply includes an frequency-hopping oscillator for generating an oscillating signal and an indication signal, an SR flip flop for outputting a driving signal according to the oscillating signal and the indication signal, to control a primary winding of a transformer of the switching power supply, a comparator for comparing a current sense signal of the primary winding and a subtraction result, to output the comparison result to the SR flip flop, a ramp generator for generating ramp signals with time-varying slopes, and a subtraction unit for performing a subtraction operation on a feedback signal and the ramp signals, to generate the subtraction result for the comparator.05-05-2011
20110101952VOLTAGE REGULATOR WITH GATE RESISTOR FOR IMPROVED EFFICIENCY - A voltage regulator includes an active control switch, an active sync switch, a driver circuit, and a gate resistor. The active control switch is coupled between an input voltage line and an input of an energy storage device. The active sync switch is coupled to the input of the energy storage device. The driver circuit is coupled to the control and sync switches to alternately drive each of the control and sync switches into a conducting state to produce a regulated voltage at an output of the energy storage device. The gate resistor is coupled in series within a control path of the sync switch. The gate resistor has a resistance value that is tuned to reduce an anticipated dead time between a turn-off time of the sync switch and a turn-on time of the control switch.05-05-2011
20120200282CHIP ELECTRONIC COMPONENT, MOUNTED STRUCTURE OF CHIP ELECTRONIC COMPONENT, AND SWITCHING SUPPLY CIRCUIT - A chip electronic component is provided with an element body containing a ferrite material; a first terminal electrode, a second terminal electrode, and a third terminal electrode arranged on the surface of the element body; and an internal conductor electrically connected to the first terminal electrode, the second terminal electrode, and the third terminal electrode. The impedance of a current path through the internal conductor between the first terminal electrode and the second terminal electrode is different from that of a current path through the internal conductor between the first terminal electrode and the third terminal electrode.08-09-2012
20120119723VOLTAGE CONVERSION APPARATUS AND ELECTRICAL LOAD DRIVING APPARATUS - A voltage conversion apparatus is disclosed in which a current passes through first and second loop circuits alternately in accordance with ON/OFF operation of a first switching element provided in the first circuit. The direction of a magnetic field through the first loop circuit formed at the ON operation is the same as a direction of a magnetic field through the second loop circuit formed at the OFF operation. The first loop circuit and the second loop circuit are provided on opposite sides of a printed circuit board, respectively, in such a manner that the first loop circuit and the second loop circuit are opposed to each other. A heat sink is provided on a surface of the printed circuit board. A solid pattern of a metal material is provided on an inner layer of the printed circuit board to be connected to the heat sink via a through hole.05-17-2012
20110248697Semiconductor device and data processing system - A semiconductor device comprises a first circuit outputting a signal to a first signal line, a first FET applied with a driving signal and having a gate electrode connected to a first node, a second FET controlling an electrical connection between the first signal line and the first node, a third FET amplifying a signal of the first node, a second circuit precharging the first signal line, and a voltage control circuit. A gate capacitance of the first FET is controlled in response to a voltage difference between the first node and the driving signal. The voltage control circuit shifts a potential of the driving signal when the second FET is non-conductive after the signal of the first-circuit is transmitted to the first node, and performs an offset control for the driving signal so as to compensate a variation of a threshold voltage of the first FET.10-13-2011
20100301830SEMICONDUCTOR DEVICE INCLUDING VOLTAGE GENERATOR - A semiconductor device includes a voltage generator. The voltage generator includes a detection circuit having a number of voltage detection units, each detection unit including a different number of resistors compared to other detection units and each detection unit outputting a respective voltage, a voltage comparison circuit configured to compare a constant voltage to each respective divided voltage outputted from detection units of the detection circuit and to output a number of control signals in response to the comparison, and a reference voltage generator configured to generate a reference voltage in response to the control signals.12-02-2010
20100301831ZERO-VOLTAGE SWITCHING POWER CONVERTER - The zero-voltage converter is able to perform at extremely high power levels and bares significant benefits to all levels; system, inverter and circuitry level. Power losses are avoided by using a new developed resonant topology. EMI problems are reduced by power module integrated capacitors as well as smart selection of the terminal technology and under full utilization of the analog components and their potentials. The power module developed for this specific application is designed under a maxim of gaining highest power density as well as lowest stray inductances. High switching frequencies enable even special electro motors with extremely low leakage inductance to perform well. This is in particular beneficial for ultra high speed drives or motors with a high pole pair number. The mechanical concept of the inverter can specifically be adopted to the referring vehicle and to its available installation space. Thus, also (hybrid) electrical vehicles can be designed based on such highly innovative conception.12-02-2010
20110254529VOLTAGE CONVERTER - A voltage converter comprises at least two capacitive charge pump stages, each comprising a capacitor, a charging switch through which a capacitor charging current is adapted to flow, and a control circuit for controlling the charging switch. 10-20-2011
20100253311CHARGE RECYCLING A 1 OF N NDL GATE WITH A TIME VARYING POWER SUPPLY - This disclosure describes an invention that is a basic charge recycling gate 10-07-2010
20090251123Self-Referencing Voltage Regulator - A voltage regulator includes an input terminal for receiving a power input having a first voltage level, and an output terminal for generating a power output. A reference signal having a second voltage level is derived from the first voltage level adjusted with a predetermined offset value for controlling the power output to be at a third voltage level proportional to the second voltage level.10-08-2009
20110254528MULTI-MODULE BIDIRECTIONAL DC-DC CONVERTER - A multi-module bidirectional power converter may comprise a low side common node, a high side common node and at least first and second bidirectional DC/DC converter modules. The modules may comprise first and second low voltage switches, first and second high voltage switches and a transformer. The transformer may comprise a low side winding having first and second legs and a high side winding having first and second legs. The first leg of the low side winding may be connected with the first and second low voltage switches of the module. The second leg of the low side winding may be connected with the low side common node of the multi-module bidirectional power converter. The first leg of the high side winding may be connected with the first and second high voltage switches of the module. The second leg of the high side winding may be connected to the high side common node of the multi-module bidirectional power converter. Such an arrangement may provide operability of the multi-module bidirectional power converter with any one or more of the modules so that efficiency is maintained when electrical loads are high and so that Zero Voltage Switching is maintained when electrical loads are low.10-20-2011
20110133718Semiconductor Device and Power Conversion Apparatus Using the same - A semiconductor device provides a gate electrode formed on a lateral face of a wide trench, and thereby the gate electrode is covered by a gate insulating layer and a thick insulating layer to be an inter layer. Therefore, a parasitic capacitance of the gate becomes small, and there is no potential variation of the gate since there is no floating p-layer so that a controllability of the dv/dt can be improved. In addition, the conductive layer between the gate electrodes can relax the electric field applied to the corner of the gate electrode. In consequence, compatibility of low loss and low noise and high reliability can be achieved.06-09-2011
20110095744LINEAR REGULATOR WITH AUTOMATIC EXTERNAL PASS DEVICE DETECTION - A power regulator circuit automatically disables an internal pass transistor when a detection circuit detects the presence of an external pass device. The internal pass transistor is made in an integrated circuit along with a detection circuit and a switch for disabling the internal pass transistor. The detection circuit detects a presence of an external pass device external to the integrated circuit. The switch automatically disables the internal pass transistor when the detection circuit detects the presence of the external pass device. The detection circuit has a comparator for comparing a signal on an outside connection of the integrated circuit and a latch to operate the switch. The comparator compares a voltage on an outside connection of the integrated circuit against a reference after power up of the regulator and can delay operation of the comparison until a predetermined time after power up. An integrated circuit can contain the power regulator circuit and the internal pass transistor. The power regulator circuit can be used on a power supply with a DC power source.04-28-2011
20100079128LOW NOISE EXTERNAL ENABLE SWITCHER CONTROL SIGNAL USING ON-CHIP SWITCHER - A method and system is disclosed for powering device sub-circuitry of an electronic device. The sub-circuitry may be used to provide control signals to a direct current switcher on a main system board, thus eliminating passive circuitry typically associated with the sub-circuitry. Furthermore, by actively generating the control signals for the direct current switcher, explicit timing control circuitry is not required to synchronize the transmitted power to the sub-circuitry.04-01-2010
20100194372MODE CONTROL CIRCUIT FOR SWITCHING REGULATORS AND METHOD THEREOF - A mode control method and apparatus for a switching regulator is disclosed. The method receives an input signal and amplifying the input signal to get an amplified signal. The amplified signal is sent to a sample circuit to get a sample signal. The sample signal is delivered to an averaging circuit to get an averaged sensed output signal. The averaged sensed output signal is compared with a first pre-determined threshold or an second pre-determined threshold to get a PWM enable signal. The appropriate mode is determined based on the PWM enable signal.08-05-2010
20110148387SWITCH MODE REGULATOR - A switch mode regulator is provided comprising: a first switch for controlling a current supply to an output inductor of the regulator; a second switch for selectively providing a conductive path to ground for current flowing through the output inductor; and an inverting amplifier having an input connected to an output of the first switch and an output connected to a control input of the second switch. The switch mode regulator may alternatively comprise: a first switch for controlling a current supply to an input inductor of the regulator; a second switch for selectively providing a conductive path to a load for current flowing through the input inductor; and an inverting amplifier having an input connected to an output of the first switch and an output connected to a control input of the second switch.06-23-2011
20100026271POWER CONVERTERS AND ASSOCIATED METHODS OF OPERATION - Power converters and associated methods of operation are disclosed herein. In one embodiment, a power converter includes a first switch and a second switch electrically coupled to the first switch in series. The first switch is electrically coupled to a first node and to a second node via the second switch. The power converter further includes a capacitor and a third switch electrically coupled to the first node and to the second node via the capacitor and the second switch. The third switch has a linear-active region of operation.02-04-2010
20100019753DC/DC POWER CONVERTING APPARATUS - Three or more circuits including a driving inverter circuit and rectifier circuits are connected in series, each of the circuits including a high-voltage side MOSFET and a low-voltage side MOSFET connected in series as well as a smoothing capacitor having positive and negative terminals between which the MOSFETs are connected. LC series circuits, each including a capacitor and an inductor, are disposed individually between one specific circuit and the other circuits with periods of resonance of the LC series circuits made equal to one another. In performing DC/DC power conversion through charging and discharging operation of the capacitors, a resonance phenomenon of the LC series circuits is used to improve conversion efficiency and achieve a reduction in size of the apparatus structure.01-28-2010
20120146612VOLTAGE STABILIZING CIRCUIT - A voltage stabilizing circuit including an input port, an output port, a transistor, a diode, a three-terminal voltage regulating reference source, a first resistor, and a second resistor. The transistor has a collector terminal and an emitter terminal connected to the input port and the output port, respectively. The diode has an anode connected to the input port and a base terminal of the transistor. The three-terminal voltage regulating reference source has an anode connected to ground, a cathode connected to the input port and a cathode of the diode, and a reference terminal The first resistor is connected between the cathode of the diode and the reference terminal of the three-terminal voltage regulating reference source. The second resistor is connected between ground and the reference terminal of the three-terminal voltage regulating reference source.06-14-2012
20090174388Dual power switch and voltage regulator using same - The present invention discloses a dual power switch and a voltage regulator using the dual power switch. The dual power switch comprises a PMOS power switch and an NMOS power switch connected in parallel and operating according to corresponding predetermined conditions, respectively.07-09-2009
20090174387Semiconductor Device - A disclosed semiconductor device includes a first power terminal to which a high voltage is applied; a clamping circuit electrically connected to the first power terminal; and an internal circuit electrically connected to the clamping circuit and driven by a voltage lower than the high voltage. The clamping circuit includes a bipolar transistor. The emitter of the bipolar transistor is electrically connected to the first power terminal. The collector of the bipolar transistor is grounded. The base of the bipolar transistor is electrically connected to the collector of the bipolar transistor.07-09-2009
20090284241SWITCHING POWER CONVERTERS WITH DIODE REVERSE CURRENT SUPPRESSION - A switching power converter includes an input terminal for receiving an input voltage, an output terminal for supplying an output voltage, a coupled choke having a main winding and an auxiliary winding, an output capacitor coupled to the output terminal, a main diode coupled between the auxiliary winding and the output terminal, and a switch having first and second positions. The main and auxiliary windings are connected to be charged by an input voltage when the input voltage is coupled to the input terminal and the switch is in the first position. The auxiliary winding is connected to reverse bias the main diode when the switch is switched from the first position to the second position to thereby suppress reverse recovery current in the main diode. The power converter may further include an auxiliary diode coupled between a common node of the main and auxiliary windings and the output terminal, as well as an inductor in series with the auxiliary diode.11-19-2009
20120146613INTEGRATED CIRCUIT-BASED DRIVE CIRCUIT FOR DRIVING VOLTAGE-CONTROLLED SWITCHING DEVICE AND METHOD OF MANUFACTURING THE DRIVE CIRCUIT - A drive circuit supplies a charging current via a charging path to drive the control terminal of a voltage-controlled switching device, with a resistor and a switching device being connected in series in the charging path. A control circuit in an integrated circuit of the drive circuit operates an internal switching device such as to selectively enable/interrupt the charging current and to regulate the voltage drop across the resistor to a fixed value. The switching device connected in the charging path can be readily changed from the internal switching device to an external switching device, in accordance with the operating requirements of the driven switching device.06-14-2012
20120146614POWER SUPPLY CONTROLLER - If a power supply path is in an abnormal state, a power-supply-path protection circuit of a power supply controller inhibits a switching circuit that switches on/off power supply from a power source to a load from power supply, using data related to a protection-current temperature characteristic line set by a characteristic setting circuit. The protection-current temperature characteristic line has a characteristic in which a protection current value is constant corresponding to increase in an ambient temperature or a negative characteristic in which the protection current value reduces corresponding to increase in the ambient temperature. Within a temperature range equal to or lower than an supposed maximum ambient temperature around the power-supply-path, the protection-current temperature characteristic line and a power-supply-path temperature characteristic line have a relation that the protection-current value is equal to or lower than an allowable current value at an identical ambient temperature.06-14-2012
20110148386FAST RECOVERY VOLTAGE REGULATOR - This document discusses, among other things, a voltage regulator having a plurality of switching devices, coupled in parallel, and configured to selectively provide a variable available drive current using a comparison of a regulated Dc output voltage to at least one reference voltage.06-23-2011
20120306469VOLTAGE REGULATOR - A voltage regulator includes: a normally-on first transistor coupled to an input voltage; an inductor provided between the first transistor and an output terminal; a return circuit provided between a reference voltage and a connection node of the first transistor and the inductor; a drive circuit that supplies a drive signal to a gate of the first transistor; and a negative voltage generation circuit that is coupled to the reference voltage, generates a negative voltage on the basis of a pulse signal generated at the connection node by switching operation of the first transistor, and supplies the negative voltage to the drive circuit.12-06-2012
20120038344Low-Noise High Efficiency Bias Generation Circuits and Method - Embodiments of signal bias generators and regulators are described generally herein. Other embodiments may be described and claimed.02-16-2012
20100097046POWER SUPPLY CIRCUIT - A power supply circuit for a motherboard includes a VRM, a first NMOS transistor, a second NMOS transistor, a first capacitor, a first induction coil, and a delay circuit. A gate of the first NMOS transistor is connected to a UGATE pin of the VRM. A source of the first NMOS transistor is connected to a BOOT pin of the VRM via the first capacitor and a PHASE pin of the VRM, and connected to an MCH on the motherboard via the first induction coil. A drain of the first NMOS transistor is connected to a system power. A gate of the second NMOS transistor is connected to an LGATE pin of the VRM. A source of the second NMOS transistor is grounded. A drain of the second NMOS transistor is connected to the source of the first NMOS transistor and the delay circuit.04-22-2010
20110050195DC to DC Converter - The invention relates to a DC to DC converter comprising a DC to DC converter unit (DCW), a first field effect transistor (FET03-03-2011
20120001612Four-switch step-down storageless converter - A four-switch step-down storageless DC-DC converter is provided having simultaneously ultra high efficiency of over 99% in an ultra compact size, while also providing a regulation and maintaining fast transient response while in regulation. Because of its storageless feature it is ideal for demanding computer applications, such as VRM (Voltage Regulator Modules), with extremely fast step-load load current change requirements and tight output voltage regulation requiring ultra low output ripple voltages during the transients.01-05-2012
20120153929DC-DC CONVERTER, MODULE, POWER SUPPLY DEVICE, AND ELECTRONIC APPARATUS - A controller CT06-21-2012
20090066312Reference voltage generation circuit, drive circuit, light emitting diode head, and image forming apparatus - A reference voltage generation circuit for outputting a reference voltage from an input voltage includes a specific voltage output unit for outputting a specific voltage from the input voltage; a first circuit section for outputting the reference voltage with a positive temperature property from the specific voltage output from the specific voltage output unit; and a second circuit section for setting a level of the reference voltage output from the first circuit section. The specific voltage output unit is formed of a regulator circuit having a first terminal connected to a power source. The first circuit section is formed of a bi-polar transistor element connected to a second terminal of the regulator circuit. The second circuit section is formed of a resistor connected to the second terminal of the regulator circuit, a collector terminal of the bi-polar transistor element, and an emitter terminal of the bi-polar transistor element.03-12-2009
20120206122CONSTANT OFF TIME BOOST CONVERTER - This document discusses, among other things, apparatus and methods for operating a voltage converter. In an example, a circuit for controlling a converter can include a comparator configured to receive an off-time charge voltage and an off-time threshold and to initiate a transition of a power transistor from an off-time state to an on-time state when the off-time charge voltage exceeds the off-time threshold, and a capacitor coupled to the comparator and configured to receive a voltage from an inductor in the off-time state and to provide the off-time charge voltage using the voltage from the inductor.08-16-2012
20120153928POWER CONTROLLER SYSTEM - A power controller system configured to electrically supply a load via a circuit is provided. The system comprises, a switching device provided in an electrical pathway for supplying current to the load, a controller configured to open the switching device when a current through or voltage across the switching device exceeds a predetermined level; and an electrical pathway provided parallel to the load to enable load current to continue to flow through the parallel electrical pathway and the load when the switching device is open to dissipate inductive energy stored in the circuit connecting the parallel electrical pathway to the load.06-21-2012
20120153930LOAD CONTROL DEVICE - A load control device includes: a main switching unit which has a main switch element connected in series to an AC power source and a load and controls the supply of power to the load; a manipulation switch that outputs a start-up signal for starting at least the load; a control unit which controls the opening and closing of the main switching unit; a first power source unit supplying a stable voltage to the control unit; and a second and a third power source unit each supplying power to the first power source unit. The load control device is characterized in that upon receiving the start-up signal, the control unit outputs an initial drive signal, for closing the main switch element, to the main switching unit before a power source supplying power to the first power source unit is switched from the second to the third power source unit.06-21-2012
20110089927VOLTAGE REGULATOR CIRCUIT - A transistor includes a gate, a source, and a drain, the gate is electrically connected to the source or the drain, a first signal is input to one of the source and the drain, and an oxide semiconductor layer whose carrier concentration is 5×1004-21-2011
20100244807DC-DC CONVERTER AND A METHOD FOR PRODUCING THE SAME - A DC-DC converter adopted in a mobile device, for converting a DC input voltage to a DC output voltage is provided. The converter comprises an input circuit, a control circuit, and a switch. The input circuit is connected in series with a line for supplying the DC input voltage and includes a parallel connection of a first capacitor and a snubber circuit. The control circuit is provided for producing a control signal. The switch, connected with the input circuit, is adapted to turn ON or OFF in accordance with the control signal, so as to produce the DC output voltage.09-30-2010
20120126777DC-DC CONVERTER CIRCUIT - A DC-DC converter circuit includes first to sixth semiconductor switches and an inductor. The first to third semiconductor switches are connected to one end of the inductor. The fourth to sixth semiconductor switches are connected to the other end of the inductor. A first voltage supply is connected to opposite ends of the first and fourth semiconductor switches from the ends of the first and fourth semiconductor switches connected to the inductor. A second voltage supply is connected to opposite ends of the second and fifth semiconductor switches from the ends of the second and fifth semiconductor switches connected to the inductor. The first voltage supply and the second voltage supply are both connected to opposite ends of the third and sixth semiconductor switches from the ends of the third and sixth semiconductor switches connected to the inductor.05-24-2012
20120126778Charge Pump Circuit with Pulse-Width Modulation - Each switching element of a charge pump circuit of a voltage regulator comprises a relatively small-sized MOS transistor associated with a relatively large-sized MOS transistor connected in parallel. Only the small transistors are switched in a first mode of operation, while the large transistors are switched in a second mode of operation. In this manner the switching losses in the first mode of operation can be decreased.05-24-2012
20120133351SWITCHING POWER SOURCE - A switching power source according to one embodiment includes a first transistor and a second transistor. The first transistor is connected to a positive electrode of a DC voltage source. The second transistor is connected between the first transistor and a negative electrode of the DC voltage source. The first transistor and the second transistor are alternately placed in conducting state. A gate signal is applied to a gate terminal of the first transistor with reference to a voltage of a terminal of the first transistor that is connected to the positive electrode. A gate signal is applied to a gate terminal of the second transistor with reference to a voltage of a terminal of the second transistor that is connected to the negative electrode. The first transistor and the second transistor are configured with wide bandgap semiconductors of mutually different materials, respectively.05-31-2012
20120313612SELF-OPTIMIZING ENERGY HARVESTER USING GENERATOR HAVING A VARIABLE SOURCE VOLTAGE - A self-optimizing energy harvester comprises a thermoelectric generator coupling to a thermal source, producing a source voltage greater than a minimum start-up voltage, where the thermoelectric generator drives a boost circuit and a feedforward circuit, delivering power to a load. A conventional boost circuit has a maximum output power only at the input voltage for which a fixed set point resistor is chosen. The feedforward circuit dynamically optimizes the boost circuit according to a dynamic set point resistance, thus increasing output power for a wide range of input voltages, relative to using a fixed reference resistor. The dynamic set point resistance is the sum of a variable resistance and a reference resistance. A sample element forms a differential voltage between the source and input voltage elements, and the variable resistance corresponds to the differential voltage. A reference resistor is chosen to establish the minimum start-up voltage.12-13-2012
20120313613HIGH VOLTAGE AND HIGH POWER BOOST CONVETER WITH CO-PACKAGED SCHOTTKY DIODE - A high voltage and high power boost converter is disclosed. The boost converter includes a boost converter IC and a discrete Schottky diode, both of which are co-packaged on a standard single common die pad. The bottom cathode is electrically connected to the common die pad. It is emphasized that this abstract is being provided to comply with rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. This abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.12-13-2012
20120249112CONTROLLER FOR SWITCH MODE POWER SUPPLY - A switched mode power supply (SMPS) controller is disclosed. The controller comprises a monitoring circuit adapted to monitor the rate of change of a voltage at an input (10-04-2012
20120249113METHOD FOR OPERATING A DIRECT CONVERTER CIRCUIT AND DEVICE TO CARRY OUT THE METHOD - A method and device for operating a direct converter circuit are provided. A control signal controls power semiconductor switches of switching cells of the associated phase module. The control signal is formed, for each phase module, from the difference between a reference signal relating to the voltage over the phase module and a voltage signal over the inductor. The voltage signal over the inductor is formed from a reference signal relating to the current through the corresponding phase module. The reference signal relating to the current through the phase module is formed from a respective mean value or instantaneous value of a phase power of a phase of the first and second current or voltage systems connected to the phase module and from respective sums of the instantaneous values or the mean values of the phase powers of the phases of the first and second current or voltage systems, respectively.10-04-2012
20120249111Cascade-Connected Boost Circuit - A cascade-connected boost circuit is disclosed. The cascade-connected boost circuit includes a first-stage boost circuit, a second-stage boost circuit, an output terminal and a regulation filtering capacitor. The first-stage boost circuit includes an input terminal, a PWM generator, a first inductor and a first switch. The second-stage boost circuit includes a second inductor and a second switch. The PWM generator controls the first switch and the second switch to turn on or turn off simultaneously. A power supply from the input terminal respectively charges the two inductors via two paths when the two switches are turned on. The two inductors release energy when the two switches are turned off. The two switches share the voltage of the output terminal. The cascade-connected boost circuit according to the present invention solves the issues that the withstand voltage limit of a single switch and the limit of a duty cycle.10-04-2012
20120169317DC-DC CONVERTER FOR LIQUID CRYSTAL DISPLAY DEVICE - A DC-DC converter of a liquid crystal display (LCD) apparatus is provided comprising a first capacitor connected between a first node and a second node, a second capacitor connected between a third node and a fourth node, and a first diode connected between the input terminal and the first node.07-05-2012
20120313611Self-Driven Synchronous Rectification Boost Converter Having High Step-Up Ratio - The present invention provides a self-driven synchronous rectification boost converter having high step-up ratio. The self-driven synchronous rectification boost converter having high step-up ratio has a first switch receiving a pulse driving signal, a first winding, a second winding and a synchronous rectification circuit constructed by an auxiliary winding and a second switch. The first winding inducts a reverse voltage when the first switch is repeatedly switched on and off. The reverse voltage then is raised via the second winding, and the auxiliary winding cooperates with a switch circuit to switch on/off the second switch according to an inducted voltage, so as to achieve an object of synchronous rectification. Under a condition of outputting high current, the present invention can greatly reduce power-consumption of rectifying and enhance efficiency.12-13-2012
20110199068MICROPROCESSOR CONTROLLED VARIATION IN CUT-OUT PULSE APPLICATION IN ALTERNATING CURRENT POWER - A microprocessor operated controller device and associated method for modifying an AC input power to provide a reduced power AC output power to a load when coupled to the controller device. The AC output power has a series of cut-out pulses in each half cycle of the AC output power waveform. The device includes a switching system having a plurality of switching elements for positioning the series of cut-out pulses in each half cycle of a waveform of the AC input power to result in said reduced power AC output power and a switch control system for coordinating opening and closing of the plurality of switching elements during positioning of the series of cut-out pulses. The switch control system includes a synchronization system for synchronizing the switching system with timing of each half cycle of the AC input power waveform. The device also includes a digital processor for selecting a predefined pattern of the series of cut-out pulses from a plurality of predefined patterns of cut-out pulses, such that at least two patterns of the plurality of predefined patterns of cut-out pulses have different combinations of parameter definitions including number of cut-out pulses per half cycle and positioning of the pulses per half cycle.08-18-2011
20120176115POWER SUPPLY CONTROLLER - The power supply controller performs the power-supply-path protection operation to restrict power supply through the switch element if a value of temperature increase of the power supply path W with respect to the reference temperature To exceeds the temperature threshold value and remove the restriction if the temperature decreases to the temperature threshold value or lower. And the controller performs the switch protection operation to restrict the power supply through the switch element if the value of the flowing current exceeds the current threshold value and remove the restriction after the reference time H elapses. And also the controller adds the additional value F to the value of temperature increase on condition that the value of the flowing current exceeds the current threshold value in the power supply protection operation and compares a post-addition temperature to the temperature threshold value.07-12-2012
20120176114POWER SUPPLY SYSTEM, CONTROLLER THEREFOR, AND METHOD OF MANUFACTURE OF CONTROLLER - A power supply system of the present invention aims to achieve optimization of the efficiency and therefore includes: z (z is a natural number equal to or larger than 2) power supplies (PS-07-12-2012
20120313615Summation Circuit in DC-DC Converter - An integrated circuit includes a saw-tooth generator including a saw tooth node configured to have a saw-tooth voltage generated thereon; and a first switch having a first end connected to the saw tooth node. The integrated circuit further includes a second switch coupled between an output node and an electrical ground, wherein the first switch and the second switch are configured to operate synchronously. A first current source is connected to the saw tooth node. A second current source is connected to the output node.12-13-2012
20120074921AREA-EFFICIENT VOLTAGE REGULATORS - Area-efficient voltage regulators are provided in which a first transistor has a first breakdown voltage and a first on-state resistance and a second transistor has a second breakdown voltage that exceeds the first breakdown voltage and a second on-state resistance that exceeds the first on-state resistance. With this arrangement, the second transistor can be biased to raise an output voltage. When the difference between an input voltage and the output voltage is less than a predetermined voltage, the second transistor is disabled and the first transistor is controlled to provide the output voltage at a wherein the controlling is preferably performed with a feedback control loop. The die area of the first transistor can be reduced because its on-state breakdown need only exceed the predetermined voltage rather than the substantially-higher input voltage. Because of the reduced on-state breakdown, the die area of the first transistor can be reduced and still obtain a low on-state resistance r03-29-2012
20120074920POWER CONVERTER CIRCUITS INCLUDING HIGH ELECTRON MOBILITY TRANSISTORS FOR SWITCHING AND RECTIFCATION - A power converter circuit includes a storage component, a rectifier component comprising a first field effect transistor and having first and second bias states, and a switch including a second field effect transistor having first and second operational states. The first and second field effect transistors are High Electron Mobility Transistors (HEMTs).03-29-2012
20100270997ARRANGEMENT AND APPROACH FOR PROVIDING A REFERENCE VOLTAGE - A reference voltage that is consistent over various operational conditions and uses low power is provided. According to an example, an internal temperature-compensated voltage (e.g., vdd_int in 10-28-2010
20100270996CIRCUIT AND METHOD TO STARTUP FROM VERY LOW VOLTAGES AND IMPROVE ENERGY HARVESTING EFFICIENCY IN THERMOELECTRIC HARVESTERS - An energy harvesting system is provided that includes a startup module for starting the energy harvesting system operation from a completely OFF state. The startup module uses mechanical vibrations due to motion to trigger a switch which permits the startup module to charge one or more first capacitive elements so to as reach a first defined voltage. A storage module buffers energy obtained from a thermoelectric harvester to be used by a load device. The storage module commences storing energy from the thermoelectric harvester when the first defined voltage has been reached allowing charging of one or more second capacitive elements to reach a second defined voltage. A DC-DC converter module provides regulated voltage to the load device after energy has been transferred from the thermoelectric harvester. The DC-DC converter module determines whether the second defined voltage has been reached and releases stored energy in the one or more first capacitive elements and the load device.10-28-2010
20120313614SWITCHING POWER SUPPLY CIRCUIT, AND METHOD FOR CONTROL OF SWITCHING POWER SUPPLY CIRCUIT - A circuit includes a reactor, a diode, and a switching element. The reactor and the diode are connected in series with each other on a power supply line. The switching element is provided between a power supply line and a point between the reactor and the diode. A circuit includes a reactor, a diode, and a switching element. The reactor and the diode are connected in series with each other on a power supply line. The switching element is provided between the power supply line and a point between the reactor and the diode. Characteristics of at least any of the reactors, the switching elements, and the diodes are different from each other.12-13-2012
20120182005VOLTAGE CONTROL DEVICE FOR A FUEL CELL - The invention relates to a device for controlling the voltage of a cell of a fuel cell, characterized in that said control device comprises a first transistor (Q07-19-2012
20100259241Voltage step-down switching DC-to-DC converter - A number of non-isolated and isolated converter embodiments are disclosed all featuring the three switches and characteristic not present in prior-art converters such as: a) reduced voltage stresses on all three switches resulting in safe operation without a danger of voltage overstress of any of the three switches over the full operating range from duty ratio of 0 to 1.0 and thus resulting in wide input voltage operating. b) operating range with magnetics flux and magnetic size much reduced compared to prior-art converters c) stressless switching eliminates switching losses and reduces stresses which are present in prior-art converters. All three features result in simultaneous increase of efficiency, reduction of size and cost when compared with prior-art converters.10-14-2010
20120187934DC-DC CONVERTER - A DC-DC converter includes: a high-side MOSFET as a main switching element which is driven by using a bootstrap capacitor; a low-side MOSFET as a synchronous rectifier, wherein a series circuit of the high-side MOSFET and the low-side MOSFET is connected to a DC power supply; and a coil and a smoothing capacitor, which are serially connected between the drain and the source of the low-side MOSFET; an overvoltage protection unit, which clamps an overvoltage; an overcurrent interrupting unit, which interrupts an overcurrent that flows when the overvoltage protection unit clamps the overvoltage; and a protection circuit, wherein the protection circuit includes: a differential-voltage detecting unit detecting the voltage of both ends of the bootstrap capacitor; and a control unit that, when the voltage detected by the differential-voltage detecting unit exceeds a predetermined value, turns OFF the low-side MOSFET and turns ON the high-side MOSFET.07-26-2012
20120256612System For The Electronic Management Of Photovoltaic Cells With Adapted Thresholds - The invention relates to a system for the electronic management of a photovoltaic generator, said system comprising a plurality of n static converters (10-11-2012
20120229116VOLTAGE REGULATOR - According to one embodiment, a voltage regulator includes an output transistor, a voltage detector, a controller, and a discharge circuit. The output transistor is connected between a power supply terminal and an output terminal. The voltage detector is connected between the output terminal and a ground terminal. The voltage detector is configured to divide an output voltage between the output terminal and the ground terminal according to an inputted voltage switching signal and generates a first voltage on the ground terminal side and a second voltage having a polarity the same as a polarity of the first voltage and having an absolute value lower than or equal to an absolute value of the first voltage. The controller is configured to detect a difference between the first voltage and a reference voltage and control the output transistor.09-13-2012
20100327840SUPPLY VOLTAGE INDEPENDENT QUICK RECOVERY REGULATOR CLAMP - Disclosed is an output stage, and associated apparatus, for a voltage regulator that includes a clamp circuit that is operable to ensure that the output voltage recovers quickly, i.e. that the perturbation of this voltage is limited and remains within a given specification, when entering a standby mode and which is controlled in a supply independent manner.12-30-2010
20100327838SWITCHING POWER CONVERTER WITH CURRENT SENSING TRANSFORMER AUXILIARY POWER SUPPLY - A switching power converter having a current sensing transformer providing input to an auxiliary power supply provides efficient current sensing, while reducing the cost of the magnetic coupling element. The auxiliary power supply and current sense circuit both receive input from a secondary winding of a current sensing transformer having a primary winding coupled in series with the converter's main magnetic coupling element. To provide accurate sensing, the magnetization the current sensing transformer is accounted for. The magnetization is compensated for in the current sensing result, current sensing is performed during a part of the cycle in which charging of the auxiliary power supply is disabled, or the core of the current sensing transformer is made large, raising its mutual inductance. In another alternative technique, a circuit node can be pre-charged to a value that cancels the offset due to the magnetization current.12-30-2010
20120262144BOOTSTRAP STARTUP AND ASSIST CIRCUIT - A bootstrap assist circuit and a startup circuit comprising a voltage controlled switch and a startup ramp voltage generator connected to the voltage controlled switch that will control a high side switch, a dimming interface or an enable/disable input function. Said system is used to provide a bootstrap technique to continuously switch a floating high side switch (MOSFET) by continuously charging a capacitor and then “level shifting” said capacitor voltage across the gate and source of the said high side switch to turn the switch on.10-18-2012
20120262145POWER-SUPPLY MODULE - A power-supply module includes at least one power-supply component, an inductor and a package. The inductor is disposed over the at least one power-supply components, and the at least a power-supply component and the inductor are disposed within the package. Besides, the power-supply module further comprises a printed circuit board, and the at least one power-supply component and the inductor are mounted to the printed circuit board. Moreover, the inductor comprises a plurality of leads that support the inductor over the at least one power-supply component.10-18-2012
20110037450SEMICONDUCTOR DEVICE - In order to reduce parasitic inductance of a main circuit in a power supply circuit, a non-insulated DC-DC converter is provided including a circuit in which a power MOS•FET for a high-side switch and a power MOS•FET for a low-side switch are connected in series. In the non-insulated DC-DC converter, the power MOS•FET for the high-side switch is formed by a p-channel vertical MOS•FET, and the power MOS•FET for the low-side switch is formed by an n channel vertical MOS•FET. Thus, a semiconductor chip formed with the power MOSFET for the high-side switch and a semiconductor chip formed with the power MOS•FET for the low-side switch are mounted over the same die pad and electrically connected to each other through the die pad.02-17-2011
20120268099HVDC POWER TRANSMISSION WITH CABLE FAULT RIDE-THROUGH CAPABILITY - A high voltage direct current (HVDC) power transmission system includes a cable fault ride-through system. The cable fault ride-through system is configured to ensure the HVDC power transmission system remains operational via an earth path between the power source end and the load end during a transmission cable fault, even in the absence of a neutral bus and/or dc circuit breakers.10-25-2012
20120319670THRESHOLD VOLTAGE DETECTION CIRCUIT - A threshold voltage detection circuit comprises a first inverter, a first transistor, a second transistor, a third transistor and a fourth transistor. The first inverter comprises a first terminal and a second terminal, a first electrode of the first transistor is electrically connected with the second terminal of the first inverter, a fourth electrode of the second transistor is electrically connected with the first terminal of the first inverter, a seventh electrode of the third transistor is electrically connected with the second terminal of the first inverter and the first electrode of the first transistor, a tenth electrode of the fourth transistor is electrically connected with a third electrode of the first transistor and a fifth electrode of the second transistor, and an eleventh electrode of the fourth transistor is electrically connected with a ninth electrode of the third transistor.12-20-2012
20120319672METHOD FOR THE CLOSED-LOOP CONTROL OF A BUCK CONVERTER AND ARRANGEMENT FOR IMPLEMENTING THE METHOD - A method for regulating a buck converter, in which the amount of the output volume is adjusted via a controlled switching, comprising a pulse sequence showing a pulse rate and being pulse width modulated, of a conductivity, which is switched serially and drops over an output voltage, and an arrangement with a control input and with a control output, between which an analog-to-digital converter, a non-linear amplifier, an IIR filter, and a pulse width modulation circuit is switched, allow a quick reaction upon a load transient by which the regulation of the output voltage at a buck converter occurs faster and with less overshooting. This is attained such that the sample rate is adjusted greater than the pulse rate and the pulse values of the pulse sequence are controlled during the cycle duration.12-20-2012
20120319671POWER GENERATING CIRCUIT AND SWITCHING CIRCUIT - The power generating circuit includes: a first transistor having a control terminal to which a second control signal is applied and one end to which a first control signal is applied; and a second transistor having a control terminal to which the first control signal is applied and one end to which the second control signal is applied, wherein the other ends of the first transistor and the second transistor are connected to an output terminal.12-20-2012
20120081098METHOD AND APPARATUS FOR SIMPLIFYING THE CONTROL OF A SWITCH - A circuit for use in a half bridge converter includes a high side switch coupled between a positive input terminal and a first terminal of a primary transformer winding. A low side switch is coupled between a negative input terminal and the first terminal. A first control circuit is coupled to the high side switch to sense a slope of a voltage across the high side switch while the high side switch is off to control the high side switch in response to the sensed slope across the high side switch. A second control circuit is coupled to the low side switch to sense a slope of a voltage across the low side switch while the low side switch is off to control the low side switch in response to the sensed slope of the voltage across the low side switch.04-05-2012
20100231192DC POLARITY CONVERTER AND DC PARALLEL TOPOLOGY, AND METHODS - Embodiments of DC power related systems and methods are described generally herein. Other embodiments may be described and claimed.09-16-2010
20110260707POWER SEMICONDUCTOR DEVICE - A power semiconductor device comprises: high side and low side switching elements; high side and low side drive circuits; a bootstrap capacitor supplying a drive voltage to the high side drive circuit and having a first terminal connected to a connection point between the high side switching element and the low side switching element and a second terminal connected to a power supply terminal of the high side drive circuit; a bootstrap diode having an anode connected to a power supply and a cathode connected to the second terminal and supplying a current from the power supply to the second terminal; a floating power supply; and a bootstrap compensation circuit supplying a current from the floating power supply to the second terminal, when the high side drive circuit turns ON the high side switching element and the low side drive circuit turns OFF the low side switching element.10-27-2011
20120280674SNUBBER CIRCUIT - A snubber circuit comprises a first energy storage device and circuitry coupled to the first energy storage device to facilitate capturing, by the first energy storage device, energy of a switching circuit. The snubber circuit also comprises a second energy storage device coupled to the first energy storage device to store the captured energy. The circuitry additionally facilitates resetting of the first energy storage device.11-08-2012
20110304311DC/DC CONVERTER, POWER SUPPLY CIRCUIT, AND SEMICONDUCTOR DEVICE - Provided is a DC-DC converter with improved power conversion efficiency. A transistor which is incorporated in the DC-DC converter and functions as a switching element for controlling output power includes, in its channel formation region, a semiconductor material having a wide band gap and significantly small off current compared with silicon. The transistor further comprises a back gate electrode, in addition to a general gate electrode, and a back gate control circuit for controlling a potential applied to the back gate electrode in accordance with the output power from the DC-DC converter. The control of the potential applied to the back gate electrode by the back gate control circuit enables the threshold voltage to decrease the on-state resistance when the output power is high and to increase the off-state current when the output power is low.12-15-2011
20120091987SYSTEM FOR SUPPLYING ELECTRICAL ENERGY - In a system for providing electrical energy for an electronic circuit adapted to supply power to a load, one terminal for a power supply voltage of the circuit is connected to a positive pole of an energy source, and one terminal for ground for the circuit is connected to a negative pole of the energy source via a rectifying electronic component, and a capacitor is connected between the two terminals of the circuit for partial supply of the circuit with electrical energy.04-19-2012
20120091985High Voltage Output Driver - An output driver circuit is provided. In accordance with various example embodiments, an output driver circuit includes a high-side driver circuit having transistors coupled in anti-series between a power source and an output node, and a low-side driver circuit having transistors coupled in anti-series between the output node and ground. For each transistor, a diode is connected between the source and drain of the transistor, with the diodes of the respective high-side and low-side circuits being arranged to prevent/mitigate the flow of current in opposite directions.04-19-2012
20100181985Regulator Circuit and RFID Tag Including the Same - One object of the present invention is to provide a regulator circuit with an improved noise margin. In a regulator circuit including a bias circuit generating a reference voltage on the basis of the potential difference between a first power supply terminal and a second power supply terminal, and a voltage regulator outputting a potential to an output terminal on the basis of a reference potential input from the bias circuit, a bypass capacitor is provided between a power supply terminal and a node to which a gate of a transistor included in the bias circuit is connected.07-22-2010
20130021015Device and Method for Controlling a Buck-Boost Converter - A circuit, device, and method for controlling a buck-boost circuit includes a bootstrap capacitor voltage regulator circuit and a comparator circuit. The bootstrap capacitor voltage regulator circuit is electrically coupled to a buck-mode bootstrap capacitor of the buck-boost converter and to a boost-mode bootstrap capacitor of the buck-boost converter. The comparator circuit is configured to control the bootstrap capacitor voltage regulator circuit to maintain a voltage of the bootstrap capacitors above a reference threshold voltage by transferring an amount energy from one of the bootstrap capacitors to the other bootstrap capacitors based on the particular mode of operation of the buck-boost converter.01-24-2013
20120242316VOLTAGE REGULATOR - Provided is a voltage regulator capable of preventing a large current from flowing even when a battery (09-27-2012
20130169258Switching Mode Power Supply and the Method Thereof - The present disclosure discloses a switching mode power supply with bi-direction buck and boost control. The switching mode power supply enters boost mode when an input signal is higher than a preset threshold to pump the input signal to a higher level; and the switching mode power supply enters buck mode when the input signal breaks down to release the stored energy.07-04-2013
20110260706Power Supply Apparatus - To provide a power supply apparatus that can supply a large current and a small current to a load circuit in a switchable manner, with a minimum circuit scale and an efficient use of electronic devices and elements contained in conventionally used power supply apparatuses. The power supply apparatus 10-27-2011
20130181693SWITCHING CIRCUIT AND POWER SUPPLY DEVICE - A switching circuit includes first and second MOS transistors of the same conductive type. The second MOS transistor has a drain connected to a first terminal, a source connected to a load connecting terminal, a gate connected to a gate of the first MOS transistor, and a back gate connected to a source of the first MOS transistor. The switching circuit includes a circuit that controls a current flowing between the source of the first MOS transistor and a resistor connecting terminal so that the potential of the source of the first MOS transistor and the potential of the source of the second MOS transistor are equal. This switching circuit further includes a circuit that outputs a control signal to the gate of the first MOS transistor and the gate of the second MOS transistor and controls the operations of the first MOS transistor and the second MOS transistor.07-18-2013
20130176014MULTI-LEVEL VOLTAGE CONVERTER - The invention discloses a voltage source converter and a voltage source converter system. The voltage source converter comprises: a multi-level voltage source converter, being adapted to output a multiple levels of a first voltage at one of two first output terminals through a multiple of first conducting paths; a first energy store; and a first switching element, being arranged to directly connected with the first output terminal, and being adapted to switch the first energy store in or out of the first conducting path so as to combine a level of the voltage of the first energy store with the level of the first voltage as a second voltage output at a second output terminal. By having the topology as above, the voltage class of each of the power semiconductors can be kept lower with the number of the power semiconductors unchanged. Besides, V07-11-2013
20130176013SEMICONDUCTOR DEVICE AND POWER SUPPLY APPARATUS - A semiconductor device includes a first transistor including a GaN-based semiconductor stacked structure formed over a substrate, a first gate electrode having a plurality of first fingers over the semiconductor stacked structure, a plurality of first drain electrodes provided along the first fingers, and a plurality of first source electrodes provided along the first fingers; a second transistor including the semiconductor stacked structure, a second gate electrode having a plurality of second fingers over the semiconductor stacked structure, the second drain electrodes provided along the second fingers, and a plurality of second source electrodes provided along the second fingers; a drain pad provided over or under the first drain electrodes, and coupled to the first drain electrodes; a source pad provided over or under the second source electrodes, and coupled to the second source electrodes; and a common pad coupled to the first source electrodes and the second drain electrodes.07-11-2013
20110273159POWER CONVERSION CIRCUIT - A power conversion circuit includes a high side switching device connected at its collector to the high potential side of a power supply, a low side switching device connected at its emitter to the low potential side of the power supply, a first junction to which the emitter of the high side switching device and the collector of the low side switching device are connected, a first diode connected at its cathode to the collector of the high side switching device, a second diode connected at its anode to the emitter of the low side switching device, a second junction to which the anode of the first diode and the cathode of the second diode are connected, an inductance connected between the first and second junctions, and a snubber circuit connected to the first junction and adapted to absorb stored energy in the inductance when a freewheeling current flows.11-10-2011
20130113453EARTH LEAKAGE POWER SUPPLY WITH BYPASS - A power supply circuit for a remote load and a local controller includes a line connection receiving electrical power from an AC source. A load connection connects to the remote load. A switch is located between the line and load connections. Power is supplied to the load from the AC source through the switch. The switch is selectively opened and closed by the controller. A low voltage supply portion supplies power from the AC source to the controller. The low voltage supply portion includes an energy storage device for storing electrical energy for the controller. A current-limited earth ground portion conducts charging current from the energy storage device to earth and prevents charging current conducted to earth from exceeding a predetermined current level. An earth ground bypass portion conducts at least some of the charging current to the load when the switch located between the line and load is open.05-09-2013
20130099767DRIVERS HAVING T-COIL STRUCTURES - A driver includes a first driver stage having at least one input node and at least one first output node. The first driver stage includes a T-coil structure that is disposed adjacent to the at least one first output node. The T-coil structure includes a first set of inductors each being operable to provide a first inductance. A second set of inductors are electrically coupled with the first set of inductors in a parallel fashion. The second set of inductors each are operable to provide a second inductance. A second driver stage is electrically coupled with the first driver stage.04-25-2013
20130134958SEMICONDUCTOR SWITCH AND POWER CONVERSION APPARATUS - According to one embodiment, a switch includes a first element with a first withstand voltage, a second element whose withstand voltage is lower than the first withstand voltage, a diode which is connected between a positive electrode of the first element and a positive electrode of the second element in such a manner that a direction from the positive electrode of the second element toward the positive electrode of the first element is a forward direction and whose withstand voltage is equal to the first withstand voltage, a negative electrode of the first element and a negative electrode of the second element being connected, and a circuit configured to apply a positive voltage to the positive terminal output a pulse lower than the first withstand voltage when the first element goes off.05-30-2013
20130141073CHARGE RECYCLING A 1 OF N NDL GATE WITH A TIME VARYING POWER SUPPLY - This disclosure describes a time varying power supply that may include a resonator circuit comprising an inductor having first and second terminals, a first capacitor coupled to the first terminal, and a second capacitor coupled to the second terminal, where the first capacitor produces a first time varying power supply output and wherein the second capacitor produces a second time varying power supply output. The time varying power supply may further include an exciter circuit comprising a first PFET and a first NFET coupled to the first terminal and a second PFET and a second NFET coupled to the second terminal. The first and second PFETs and the first and second NFETs may be coupled to a corresponding one of four non-overlapping clock phases.06-06-2013
20110215788DC-DC CONVERTER - The present invention is a DC-DC converter characterized by including a switch element that is provided between one end of a DC power source and one end of a load and turns ON and OFF current input from the DC power source, an inductance element that is provided between one end of the switch element on a load-side end and includes a doughnut-shaped magnetic core and a conductive wire wound around the magnetic core, a commutation switch provided between a node between the switch element and the inductance element and a ground potential, and a capacitance element provided between a node between the inductance element and the load and the ground potential, wherein a magnetic flux density of the magnetic core varies partially.09-08-2011
20130147458ADAPTIVE DEAD-TIME CONTROL - A DC-to-DC converter includes first and second transistors that are connected in series between a supply voltage and ground and that are driven by PWM pulses. A junction of the transistors is connected to an inductance that is connected in series to a load. A first timing module determines a first time difference between a first edge of a first signal at the junction and a first edge of a second signal at a control terminal of the first transistor. A second timing module determines a second time difference between a second edge of the first signal and a second edge of the second signal. The first and second edges of the second signal respectively correspond to first and second edges of one of the PWM pulses. A delay module delays the first and second edges of the second signal respectively based on the first and second time differences.06-13-2013
20130147457SINGLE INDUCTOR MULTIPLE OUTPUT (SIMO) DIRECT CURRENT-TO-DIRECT CURRENT (DC/DC) CONVERTER AND CONTROL METHOD THEREOF - Provided is a single inductor multiple output (SIMO) direct current-to-direct current (DC/DC) converter that may perform DC/DC conversion by transferring, to output nodes, input current that is input and thereby stored in a single inductor. An output selection unit of the SIMO DC/DC converter may select, from output nodes, a first output node to be supplied with current from a driving unit, and provide output voltage of the first output node and reference voltage of the first output node to a hysteresis comparison unit. The hysteresis comparison unit may control on-time and/or inductor peak current by determining whether the output voltage of the first output node is higher than the reference voltage of the first output node by at least a first threshold, and whether the output voltage of the first output voltage is lower than the reference voltage of the first output voltage by at least a second threshold.06-13-2013
20120274305Voltage Regulator and Voltage-Regulator-Equipped Oscillation Circuit - A voltage regulator comprises an N type depletion MOS transistor having a drain connected to the positive electrode side of a power supply, a source connected to a stabilizing capacitor, and a gate receiving a constant reference voltage, and has an output terminal at the source of the N type depletion MOS transistor. In this simple circuit configuration, the voltage regulator can markedly reduce a noise carried on an output voltage.11-01-2012
20120274304Low-Voltage-Driven Boost Circuit and Associated Method - A low-voltage-driven boost circuit is provided. The boost circuit includes an inductor, a diode, a capacitor, a first switch and a second switch. The second switch is coupled between the first switch and an anode of the diode. The first switch selectively conducts according to a switch signal, and the second switch conducts as the first switch conducts.11-01-2012
20110234196VOLTAGE CONVERTER - There is provided a voltage converter capable of reliably preventing malfunctions of an electronic circuit to stably maintain an accurate operation by suppressing high-frequency noise generated on an input side. A DC-DC converter 09-29-2011
20110234195CONTROL CIRCUIT and ELECTRONIC DEVICE - A controller includes a difference detector that detects a difference between a switching timing of a first channel of a switching power supply including a plurality of channels, and a switching timing of a second channel of the switching power supply, the plurality of channels being coupled in common to an input power supply and performing switching operations in response to clock signals, and a timing adjuster that, based on a detection result of the difference detector, increases a difference between a timing of a clock signal supplied to the first channel and a timing of a clock signal supplied to the second channel when the difference between the switching timing of the first channel and the switching timing of the second channel is smaller than a first value.09-29-2011
20110234194INTERNAL VOLTAGE GENERATOR - A internal voltage generator includes a plurality of voltage level detection units, each configured to detect a voltage level of a corresponding internal voltage terminal, based on a predetermined target voltage level assigned to the corresponding internal voltage terminal, and generate a detection signal, a common internal voltage generation unit configured to generate an internal voltage through a pumping operation in response to the detection signal outputted from the voltage level detection units, and a path multiplexing unit configured to selectively output the internal voltage to one of the internal voltage terminals.09-29-2011
20110234193MULTIPLE PHASE SWITCHING REGULATOR WITH PHASE CURRENT SHARING - A phase current sharing network for a current mode multiphase switching regulator. The multiphase switching regulator includes switching networks for developing phase currents of switching phase networks controlled by pulse control signals for converting an input voltage to an output voltage. The regulator develops the pulse control signals based on current control values and at least one trigger value. The phase current sharing network includes conversion networks and a phase current combining network. Each conversion network provides a phase current value based on a corresponding phase current, such as by directly or indirectly measuring real current or by synthetically developing the phase current value. The phase current combining network develops an average phase current value based on the phase current values, and subtracts the average phase current value from each phase current value to provide the current control values used to control the switching networks.09-29-2011
20110234192ON/OFF DETECTION CIRCUIT - An ON/OFF detection circuit for detecting an electronic device includes a switch circuit, a current sampling circuit, an amplifying circuit, and a control circuit. The switch circuit includes an input terminal connected to a constant voltage source, an output terminal coupled to the electronic device, and a control terminal. The current sampling circuit is connected between the input terminal and the output terminal of the switch circuit, and is configured for sampling current flowing to the electronic device and converting sampled current into sampled voltage. The amplifying circuit is configured for filtering and amplifying the sampled voltage. The control circuit controls the ON and OFF of the electronic device and compares the sampled voltages with a comparison voltage to judge the electronic device is qualify or disqualify.09-29-2011
20130154601REGULATOR TRANSIENT OVER-VOLTAGE PROTECTION - This document discusses, among other things, apparatus and methods for providing over-voltage transient protection of a voltage regulator. In an example, an apparatus can include a first transistor including a control node and first and second switch nodes, and a low-pass filter configured to couple to the control node of the first transistor and to switch the first transistor to a first state when a voltage change of the supply voltage exceeds a threshold. The first transistor, in the first state, can be configured to couple a control node of a second transistor to the supply voltage to protect components coupled to a regulator transistor.06-20-2013
20130154602Pulse Width Modulation Controller Architectures - Systems, apparatuses, and techniques for pulse width modulation (PWM) are described. A described system includes a circuit that contains an inductor and a transistor that controls current through the inductor based on a PWM signal to produce an output; and a controller to provide the PWM signal, which includes PWM cycles that include on-durations and off-durations. The controller can receive a first signal indicating an input voltage that is applied to the inductor, receive a second signal indicating a current through the inductor, use an on-duration parameter value to control the on-duration, determine a maximum off-duration of the off-durations corresponding to the PWM cycles occurring within a first voltage cycle, the first voltage cycle being defined between two consecutive zero-crossing events as indicated by the first signal, and adjust the on-duration parameter value for a second, subsequent voltage cycle based on the maximum off-duration to regulate the output voltage.06-20-2013
20130181694Converter For Converting An Input Current To An Output Voltage, Arrangement Comprising The Converter And Method For Converting An Input Current To An Output Voltage - A converter for converting an input current to an output voltage may include: a first region; a second region galvanically separated from the first region; an input reference node in the first region, wherein the converter allows a flow of the input current through a device to the input reference node; a circuitry for generating, based on the input current, the output voltage relative to an output reference electric potential, the circuitry including a voltage transfer component for transferring the output voltage from the first region to the second region, wherein the voltage transfer component comprises a first circuit in the first region and a second circuit in the second region, wherein the first circuit is driven by a first electric supply voltage relative to a first supply reference potential; and an output terminal, located in the second region and connected to the second circuit, for outputting the output voltage.07-18-2013
20110309816AC VOLTAGE CONTROLLER - An AC voltage controller has two transistors which can be positioned between two AC voltage terminals in series with a load. The two transistors are connected in series in such a way that their respective source terminals are connected to one another. The AC voltage controller also contains a signal generator for generating a switching signal for actuating the two transistors, a buffer which is connected downstream of the signal generator and which is set by the signal generator in order to actuate the two transistors. An actuation circuit or driver circuit is connected downstream of the buffer, for the purpose of actuating the two transistors in accordance with the set state of the buffer. A current-limiting circuit is provided for limiting or switching off the current through the two transistors in the case of an excessively large current through the load.12-22-2011
20110309815POWER CONVERTER AND METHOD OF POWER CONVERSION - A power converter includes a power converting unit and a driving circuit. The power converting unit generates a DC output voltage based on a pull up driving signal, a pull down driving signal, and a DC input voltage. The driving circuit compensates for an inductor peak current, and performs in a pulse-frequency-modulation (PFM) mode and a pulse-width-modulation (PWM) mode to generate the pull-up driving signal and the pull-down driving signal based on the DC output voltage and the compensated inductor peak current. The power converter performs a mode transition between the PFM and PWM modes at a uniform load current, even when a magnitude of the DC output voltage varies.12-22-2011
20110309814USE OF AUXILIARY CURRENTS FOR VOLTAGE REGULATION - One embodiment relates to an apparatus that includes at least one circuit block and a voltage source configured to supply a first voltage to the at least one circuit block. The apparatus also includes a power delivery unit configured to be selectively activated based on a whether a quantity of power is to be delivered from the power delivery unit to the circuit block. A control unit is configured to, upon a change in power consumption of the at least one circuit block, activate the auxiliary power delivery unit to deliver the quantity of power to the circuit block. The auxiliary power delivery unit can quickly supply large currents since it does not necessarily rely on slow control loops using voltage sensing. Rather, the auxiliary power delivery unit often delivers pre-calculated current profiles to respond to the timing characteristic of the change of power consumption and of the voltage regulator.12-22-2011
20130187627SEMICONDUCTOR DEVICE AND POWER SUPPLY DEVICE - A semiconductor device includes: a lead frame that is composed of a lead and a die stage; a GaN-HEMT that is disposed on the die stage and has a source electrode on a rear surface of the GaN-HEMT, the source electrode being connected to the die stage; and a MOS-FET that is disposed on the die stage and has a drain electrode on a rear surface of the MOS-FET, the drain electrode being connected to the die stage; wherein the source electrode of the GaN-HEMT and the drain electrode of the MOS-FET are cascode-connected with each other via the die stage.07-25-2013
20130187626Soft Switch Driving Circuit - A soft switch driving circuit is disclosed for a DC converter, to transform an input voltage into an output voltage. The soft switch driving circuit includes a regulating module for outputting a reference voltage, a first bootstrap circuit for generating a first voltage value according to a DC voltage, a second bootstrap circuit for generating a second voltage value according to the reference voltage, a control module for generating a plurality of control signals according to a control voltage, a switch module having one end coupled to the first bootstrap circuit and another end coupled to the second bootstrap circuit for outputting a voltage signal, and an output circuit connected to the control module and the switch module for transforming the input voltage into the output voltage according to the voltage signal and one of the plurality of controlling signals.07-25-2013
20120019230DC/DC CONVERTER CIRCUIT AND METHOD FOR CONTROLLING A DC/DC CONVERTER CIRCUIT - A DC/DC converter circuit to be used in the field of MPPT for solar inverters, for step-up DC/DC conversion for high output voltages, and for chargers in electrical vehicles. The circuit comprises a first DC terminal and a second DC terminal, a first DC voltage being defined there between. It further comprises a positive split DC terminal and a midpoint terminal, a positive split DC voltage being defined there between. A negative split DC terminal is provided, a negative split DC voltage being defined between said negative split DC terminal and said midpoint terminal. A first switch and a second switch are provided, and a converter inductance is storing electric energy therein. A first diode is connected between a first terminal of said first switch and said positive split DC terminal, and a second diode is coupled between an internal midpoint and said midpoint terminal.01-26-2012
20130193947POWER CONVERTER - A high voltage resonant step-up convertor converts a lower voltage signal to a higher voltage signal. The converter may be used, for example, to supply power via electromagnetic coupling to an implantable medical device. In some embodiments, a power converter comprises a driver circuit and a resonant circuit. The resonant circuit generates a high voltage output signal at a selected frequency. The driver circuit is controlled by a low voltage signal and periodically generates a higher frequency signal (e.g., approximately twice the selected frequency) to drive the resonant circuit. In some embodiments, the driver circuit comprises another resonant circuit and a switching circuit. The switching circuit periodically pumps current to the other resonant circuit and isolates the two resonant circuits. The other resonant circuit periodically pumps current to the output resonant circuit.08-01-2013
20130200876REGULATING APPARATUS WITH SOFT-START AND FAST-SHUTDOWN FUNCTION - A regulating apparatus with soft-start and fast-shutdown function is applied to a voltage-supplying apparatus. The regulating apparatus includes a soft-start and fast-shutdown circuit, a regulating circuit, and a ground circuit. When voltages are supplied from the voltage-supplying apparatus to the soft-start and fast-shutdown circuit, the regulating circuit, and the ground circuit, the ground circuit is connected to ground, so that the starting time of the regulating circuit is delayed by the soft-start and fast-shutdown circuit. When voltages are not supplied from the voltage-supplying apparatus to the soft-start and fast-shutdown circuit, the regulating circuit, and the ground circuit, the ground circuit is not connected to ground, so that the regulating circuit is shut down fast by the soft-start and fast-shutdown circuit.08-08-2013
20120086427ALTERNATING CURRENT/DIRECT CURRENT TWO-WAY SWITCH - There is provided an AC/DC two-way switch connected between an AC power source or a DC power source and a load to control a power supply to the load. The AC/DC two-way switch includes: a bi-directional semiconductor switch element having a transistor structure connected in series between a power source and the load; a rectifying unit connected in parallel between the first input terminal and a second input terminal; a power source unit for converting an output voltage from the rectifying unit into a stable voltage; and a controller for controlling an entire operation of the AC/DC two-way switch. The AC/DC two-way switch further includes a driving unit for turning on the bi-directional semiconductor switch element in response to a control signal.04-12-2012
20120086426SINGLE-INDUCTOR MULTIPLE-OUTPUT POWER SUPPLY WITH DEFAULT PATH - The disclosed embodiments relate to a power supply for a portable electronic device. This power supply includes a power source, an inductor, a control circuit, and an input switch that couples the input terminal of the inductor to either the power source or a reference voltage. The power supply also includes a first output path that produces a first output voltage and a second output path that produces a second output voltage. The first output path includes a first diode coupled between the output terminal of the inductor and the first output voltage, and a first output capacitor coupled between the first output voltage and the reference voltage. The second output path includes a second diode and an output switch coupled between the output terminal and the second output voltage, and a second output capacitor coupled between the second output voltage and the reference voltage.04-12-2012
20120086425METHODS AND APPARATUS FOR RESISTIVE VOLTAGE SENSING IN AN ISOLATED POWER DISTRIBUTION UNIT - Methods and apparatus provide for a primary side circuit including one or more voltage nodes; and a monitoring circuit operating to monitor one or more parameters of the primary side circuit, and including at least one sensing circuit and at least one processing circuit within a secondary side circuit, where the sensing circuit includes a resistor network having an input for receiving a first sensed voltage from a first of the voltage nodes of the primary side circuit, traversing an isolation boundary between the primary side circuit and the secondary side circuit while adhering to a safety specification, which includes a primary-secondary isolation requirement, and having an output for providing a first modified sensed voltage to the processing circuit.04-12-2012

Patent applications in class Using a three or more terminal semiconductive device as the final control device

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