27th week of 2009 patent applcation highlights part 21 |
Patent application number | Title | Published |
20090167187 | LIGHTING CONTROLLER OF LIGHTING DEVICE FOR VEHICLE - A lighting controller of a lighting device for a vehicle includes M (M is an integer of one or more) switching regulators for supplying driving currents to first to Nth (N is an integer of one or more) semiconductor light sources; first to Nth current driving portions; a temperature detector; and a control circuit. The first to Nth current driving portions include first to Nth current detecting portions connected to the semiconductor light sources and serving to detect the driving currents respectively; and first to Nth switching portions connected to the semiconductor light sources respectively. The first to Nth current driving portions operates the switching portions corresponding to magnitudes of the driving currents detected by the current detecting portions respectively. The temperature detector detects a temperature and sends a temperature detecting signal when the detected temperature is equal to or higher than a pre-specified temperature. The control circuit controls the current driving means in order to decrease the driving currents to be supplied to the semiconductor light sources upon receipt of the temperature detecting signal. The control circuit sets a priority of each of the semiconductor light sources for decreasing the driving current and decreases the driving current in order from the semiconductor light source having a highest priority. | 2009-07-02 |
20090167188 | METHOD AND DEVICE FOR CONTROLLING THE LIGHT FUNCTIONS IN FRONT HEADLAMPS FOR ROAD VEHICLES - Future vehicle headlamps will provide light functions, such as, for example, town light, country road light, motorway light, full beam, poor weather light, etc. A method and a device is therefore provided with which the light functions of vehicle headlamps are controlled in a reliable manner. The device essentially comprises front headlamps with a dipped headlight and full beam, and at least one variable actuator with which different light functions can be realized. In order to select a light function, the variable actuator is set to a predetermined, fixed position. In this case, it is not possible to select a light function in the region between the dipped headlight and the full beam, there being no means of locking the actuator in the intermediate region between the position of the actuator for the dipped headlight and the position for full beam. Only a light function which is matched to the driving situation and can be selected in a reliable manner is therefore possible. | 2009-07-02 |
20090167189 | STANDARD ILLUMINANT APPARATUS CAPABLE OF PROVIDING STANDARD LED LIGHT - A standard illuminant apparatus suitable for providing a standard optical property of LED for measurement is provided. The standard illuminant apparatus comprises an illuminant module and light shape control module, wherein the illuminant module is capable of providing light, and the light shape control module is capable of receiving the light and transforming the light shape of the light to a predetermined light shape as a LED light shape. | 2009-07-02 |
20090167190 | Apparatus and Method for a Light-Emitting Diode Lamp that Simulates a Filament Lamp - Disclosed herein is a circuit assembly comprising a light-emitting diode (LED) load in combination with a filament bulb simulation circuit, the filament bulb simulation circuit being configured to simulate a load that would be presented to a monitoring system by a filament bulb. In this manner, a filament bulb can be effectively replaced with one or more LEDs and thereby achieve power consumption savings. Also disclosed is a method for monitoring an LED circuit assembly with a monitoring system to determine whether the LED circuit assembly is deemed operational. | 2009-07-02 |
20090167191 | LIGHT EMITTING DEVICE - A light emitting device 1 is adapted, with a distributed power supply voltage, to turn on a light emitter 7, while timing a continuous conduction time with a pulse generating circuit 2, a frequency dividing circuit 3, and a counting memory circuit 4, to flash the light emitter 7 on and off with an on-off pattern depending on a result of the timing, signaling out information on the continuous conduction time. | 2009-07-02 |
20090167192 | ACTIVE FRAME SYSTEM FOR AMBIENT LIGHTING USING A VIDEO DISPLAY AS A SIGNAL SOURCE - Active diffuser frame system (A) for a video display (D) provides ambient lighting in viewer object mode and relies on real-time video input only, with no separate lighting script required. The system uses a controllable light source, and multiple inputs to improve realism and fidelity. Video inputs include actual display light; sensing of display light; and the video display signal. The frame can include a light modulator, or a goniophotometric or goniochromatic element to change character (intensity, color) of ambient light as a function of viewing angles, or a photoluminescent emitter for new chromaticities outside the display color gamut. The frame can split light between the viewer and the frame input, and can derive an added video signal to drive selected display pixels to boost output of display light into the frame. | 2009-07-02 |
20090167193 | IMAGE-PROCESSING EQUIPMENTS, IMAGE-PROCESSING METHOD, PROGRAM, AND RECORDING MEDIUM - An image display apparatus which represents a grayscale by pulse-width modulation driving of a display element includes: a light source which illuminates the display element; a light source driving part which drives the light source; a photodetector which detects the emission intensity of light emitted from the light source; a sample-and-holder which obtains the emission intensity of the light source by the photodetector at a predetermined timing in a light emission period of the light source; and a compensation current generating part which (i) obtains the manner in which the emission intensity of the light source changes on the basis of a first sample value obtained at a first timing by the sample-and-holder and of a second sample value obtained at a second timing by the sample-and-holder or a predetermined target value of the emission intensity; and (ii) controls the light source driving part for compensating the emission intensity of the light source on the basis of the obtained manner in which the emission intensity changes. | 2009-07-02 |
20090167194 | LIGHT EMISSION CONTROL SYSTEM AND IMAGE DISPLAY SYSTEM - The present invention provides a light emission control system including a plurality of light emitting modules each including a plurality of light emitting elements and each being a unit to be controlled, light emitting module controllers each provided for each of the light emitting modules and controlling a corresponding light emitting module, and central controller controlling the light emitting modules. The plurality of light emitting module controllers are divided into a plurality of groups, a plurality of light emitting module controllers belonging to each of the groups are connected in a cascade manner within the group, the plurality of groups are connected in parallel with the central controller, and control information transmitted from the central controller to each of the plurality of groups is sequentially transferred from a light emitting module controller to a following light emitting module controller in each of the groups. | 2009-07-02 |
20090167195 | Light source system - A light source system capable of controlling a light emission amount of a light source section more accurately while keeping manufacturing costs low is provided. The light source system includes a light source, a light-sensing device detecting light from the light source, a calculation means, and a light source control means. The calculation means calculates a net light amount by subtracting a measurement environment component from a light amount detected by the light-sensing device. The measurement environment component is independent of a lighting state in the light source. The light source control means controls the light source on the basis of the net light amount obtained by the calculation means. | 2009-07-02 |
20090167196 | POWER SUPPLY FOR LIGHT EMITTING DIODE DEVICE - A power supply ( | 2009-07-02 |
20090167197 | Driver and method for driving LEDS on multiple branch circuits - Techniques pertaining to driving LEDs on multiple branches of a circuit are disclosed. According to one aspect of the present invention, an LED drive circuit includes a boost circuit configured for receiving an input voltage and providing an output voltage according to a control signal, a selector configured for alternatively selecting one of the feedback signals as an output feedback signal and switching on a corresponding branch circuit, and a pulse-width modulation (PWM) controller configured for generating a pulse-width modulation signal as the control signal for the boost circuit according to the output feedback signal of the selector, essentially to match respective currents in the multiple branches. | 2009-07-02 |
20090167198 | Light string having shunt circuitry arranged on husk of light bulb assembly - Provided is a light string with a light bulb having additional shunt circuitry. The light string is comprised by a plurality of light bulb units electrically interconnected by conductive wires. Each light bulb unit includes a socket assembly in which a husk along with a light bulb is electrically assembled, each light bulb arranged with switching diode or resistor so as to configure a shunt circuitry. Accordingly, the current flows through the additional shunt circuitry configured by the switching diode or resistor arranged on the husk when the light bulb is fallen, broken or the tungsten filament and shunt circuitry within the light bulb is broken, such that the remaining light bulbs can still functionally work. | 2009-07-02 |
20090167199 | FRONT-STAGE VOLTAGE-ADJUSTMENT INVERTER - The present invention discloses a front-stage voltage-adjustment inverter, which comprises: a front-stage voltage-adjustment unit, a duty cycle modulation unit, a half-bridge driving unit and a transformer unit. The front-stage voltage-adjustment unit receives an input power, a dimming signal and a feedback signal. The front-stage voltage-adjustment unit varies the voltage of the input power according to the dimming signal and performs a feedback adjustment according to the feedback signal. In the present invention, the cycle signal generated by the duty cycle modulation unit does not vary with the dimming signal and feedback signal. Thus, the half-bridge driving unit can work in a zero-voltage switching state constantly and drive the transformer unit to output a driving power. Thereby, the present invention can decrease the switching loss and increase the service lives of loads and electronic elements. | 2009-07-02 |
20090167200 | SWITCHING POWER CONVERTER WITH CONTROLLED STARTUP MECHANISM - A switching power converter with a controlled startup mechanism includes a switching stage which provides a voltage V | 2009-07-02 |
20090167201 | LIGHT SOURCE AND METHODS FOR MICROSCOPY AND ENDOSCOPY - In one example embodiment, a drive probe is coupled to the lamp body to provide the primary power for ignition and steady state operation of the lamp. Feedback may be used to adjust frequency in response to changing conditions of the lamp during startup. A phase shifter may be used to adjust the phase of the power between ignition and steady state operation. A sensor may detect a lamp operating condition that automatically triggers a shift in phase after the fill in the bulb is vaporized. In another example embodiment, a method for sequentially optimizing the drive power and phase shift applied to the lamp is disclosed that may reliably regulate the lamp current consumption to desired startup and operational levels despite variations in lamp environmental conditions. | 2009-07-02 |
20090167202 | AC Light Emitting Diode And AC Led Drive Methods And Apparatus - An AC LED package and circuits are disclosed along with an AC LED driver. The AC LED circuit may include as few as one LED or an array of anti-parallel LEDs driven with AC power sources and AC LED drivers at various voltages and frequencies. The AC LEDs are pre-packaged in various forms and materials and designed for mains or high frequency coupling in various forms to AC power sources, inverter type drivers or packages. The AC LED driver is a fixed frequency driver that provides a relatively constant voltage output to different size loads within the wattage limitation of the driver and in some cases is a direct mains power source. | 2009-07-02 |
20090167203 | AC-powered, microprocessor-based, dimming LED power supply - A dimmable, light-emitting diode (LED) power supply adapted to provide a direct current (DC), constant current (“constant current source”) from a conventional, phase-controlled 120 VAC, 60 Hz power source is disclosed. The constant current source of the present invention utilizes two processes to control dimming. In a first process, the phase angle of the input voltage is used to control the duty cycle of a line frequency pulse width modulation (PWM). In a second process, a proportional-current limit adjustment is used to control the average current to the LED during the ON time of the line frequency by PWM. As a result, at relatively low phase angles, peak currents can be lowered, reducing flicker and improving the audible noise levels generated by the circuit. | 2009-07-02 |
20090167204 | LAMP CONTROL CIRCUIT AND METHOD OF DRIVING A LAMP - In a method of driving a lamp using a lamp control circuit, the lamp control circuit comprises a communication circuit and a lamp driving circuit. The lamp driving circuit is configured to drive a lamp in accordance with a number of lamp operating parameters. The method comprises providing a lamp operating parameter to a memory of the communication circuit; providing a supply voltage to the lamp driving circuit; and supplying the lamp operating parameter from the memory to the lamp driving circuit. Then, driving the lamp by the lamp driving circuit corresponding to the supplied lamp operating parameter In the lamp control circuit, the communication circuit comprises a memory and is configured to supply the lamp operating parameter to the lamp driving circuit, when the lamp driving circuit is supplied with a supply voltage. In an embodiment, the lamp operating parameter may be supplied to the memory when no supply voltage is supplied to the lamp control circuit. | 2009-07-02 |
20090167205 | LED Drive Circuit And Method For Using Same - In various embodiments, there is provided an LED drive circuit and a method for using the same. Specifically, the present disclosure is directed to an LED drive circuit for pulse oximeters. In an embodiment, the LED drive circuit includes a current mirror configured to provide drive current to an LED of a sensor. Additionally, the method includes providing current to first and second current mirrors, wherein the first and second current mirrors are configured to control first and second light sources. | 2009-07-02 |
20090167206 | LIGHTING DEVICE - A lighting device ( | 2009-07-02 |
20090167207 | Dimmable Operating Device having Internal Dimming Characteristic - The invention relates to an operating device (BG) for lamps (LM), comprising an interface (IFi), by means of which the device (BG) may be provided with external dimming values. The device (BG) converts said provided external dimming values into internal dimming values on the basis of which the control of the connected lamps (LM) is achieved, the internal dimming values being of higher resolution than the external dimming values. According to the invention, the operating device (BG) is designed such that the conversion of the external dimming values into internal dimming values may be programmed. The operating device (BG) can particularly also be designed such that said conversion can be programmed with regard to the dynamics thereof. A programming can be provided by a time conversion relationship (linear, logarithmic or exponential time curve etc.) by means of which an internal dimming value corresponding to an external dimming value is reached. | 2009-07-02 |
20090167208 | METHOD FOR SUPPLYING A DC LOAD VIA MULTIPLE PARALLEL POWER SUPPLIES AND A POWER SUPPLY THEREFOR - The present invention relates to a lamp illumination system and method for sharing power to an electrical DC load that exceeds a capacity of a first DC power supply between the first DC power supply and a second DC power supply such that in combination all of the power supplies are able to provide rated load power, said method comprising: connecting across the load the first and second DC power supplies each having a respective partial series resonance converter that produces during alternate switching cycles an output voltage across respective resonance capacitors thereof and each converter being operable in clamping mode; and operating the converter of the first DC power supply in clamping mode so as to limit an output voltage across the respective resonance capacitors thereof and thereby prevent the first DC power supply from attempting to source a load that exceeds a nominal power rating of the first DC power supply within a predetermined accuracy, whereby any power shortfall to the load is provided by the second DC power supply. | 2009-07-02 |
20090167209 | Circuit arrangement and method for operating at least one electric lamp - A circuit arrangement for operating at least one electric lamp having an inverter has at least one first and one second bridge transistor arranged in series with one another, a first drive circuit for the first bridge transistor; a second drive circuit for the second bridge transistor; the and second drive circuits being designed to drive the first and second bridge transistors to switch alternately completely on and off during normal lamp operation; and at least one protective apparatus; the at least one protective apparatus being designed, in the case of a value for a reference voltage, which is correlated with the voltage across the bridge transistor which has just been switched off, above a predeterminable limit value, to drive the bridge transistor, which has just been completely switched on, such that it is no longer completely switched on. A related method is also described. | 2009-07-02 |
20090167210 | Current shaping of an LED signal for interfacing with traffic control equipment - A system creates a desired current level within a traffic signal. A power supply unit receives an external power signal and transforms the power signal to a lamp current. A pulse generator monitors the value of the lamp current and automatically adjust the power usage of the current sink circuit to maintained a predefined current amplitude. A current pulser generates square current pulses at a frequency based at least in part on the frequency of the lamp current. A current sink superimposes the rectangular current pulse onto the lamp current and outputs a combined power signal to the alternating current power line. | 2009-07-02 |
20090167211 | METHOD OF DRIVING A DISCHARGE LAMP, AND DRIVING UNIT - The invention describes a method of driving a discharge lamp ( | 2009-07-02 |
20090167212 | Driving Circuit and Method for Preventing Lamp from Blasting - In a driving circuit and method for preventing a lamp from blasting, a driving circuit includes a control circuit module, a voltage conversion circuit module, a driving module and a feedback circuit. The control circuit module outputs a first control signal according to a predetermined setting. The voltage conversion circuit module receives the first control signal and converts the first control signal into a second control signal. The driving module receives the second control signal and generates a driving signal according to the second control signal for driving the lamp. The feedback circuit electrically couples to one of the control circuit module, the voltage conversion circuit module and the driving module for receiving a feedback signal therefrom. The feedback signal is transmitted to the control circuit module, so that the control circuit module may adjust the first control signal according to the feedback signal. | 2009-07-02 |
20090167213 | DANCING GUIDE FLOOR USING LED MATRIX DISPLAYS - The present inventions concerns a display system ( | 2009-07-02 |
20090167214 | ELECTRICAL ACTUATOR - An electric actuator includes a motion conversion mechanism and a position detector. The motion conversion mechanism converts rotation of a rotary shaft of a motor into linear motion of an output shaft. The position detector detects a permanent magnet M, which moves integrally with the output shaft. A motor control portion controls the motor based on commands from a host command unit. A control program for controlling the motor includes, as control modes, six fluid pressure cylinder modes, according to which the motor is controlled. Specifically, each of the control modes corresponds to one of the cases where the fluid pressure cylinder is controlled by three solenoid valves, or a two-position single solenoid valve, a two-position double solenoid valve, and a three-position double solenoid valve. The motor is controlled according to the selected control mode. | 2009-07-02 |
20090167215 | DISPLACEMENT-PREVENTING DEVICE FOR COILABLE SHADE - A displacement-preventing device includes a control device electrically connected to an AC power source. The control device includes an upward movement contact, a downward movement contact, and a common contact. A power circuit is electrically connected to the common contact and converts the AC power source into a DC power source. A positing circuit is electrically connected to the control device, the power circuit, and the motor. The control device is operable to control rotation of the motor in either of two opposite directions for moving the coilable shade in the coiling direction or the uncoiling direction. The control device stops the motor when no power is input to the motor, and the positioning circuit causes a positive terminal of the motor to be in electrical connection with a negative terminal of the motor. | 2009-07-02 |
20090167216 | Vehicle power controller - A power controller alleviating change of braking feeling caused by reduced regenerative braking force is provided. Energy generated by regenerative braking is used for charging a capacitor. The charging power P(C) is calculated and whether P(C) has reached a maximum value WMAX of predetermined limit control value WIN(C) or not is determined. If P(C) is determined to have reached WMAX WIN(C) is regulated to be smaller from that time point. | 2009-07-02 |
20090167217 | Vehicle Power Controller - An ECU executes a program including the steps of: calculating regenerative power value P based on a brake pressure (S | 2009-07-02 |
20090167218 | METHOD AND APPARATUS FOR BRAKING A MOTOR - The invention relates to a method and an arrangement for braking a synchronous motor ( | 2009-07-02 |
20090167219 | Motor Drive Circuit, Fan Motor, Electronic Device, and Notebook Personal Computer - A motor drive circuit includes: a pulse generation circuit configured to generate a pulse signal whose duty ratio of one logic level is increased as a drive voltage is increased in accordance with a target rotation speed of a motor; and a drive control circuit that configured to drive the motor with the drive voltage using a duty ratio higher than the duty ratio of the pulse signal when the motor starts rotating from the stopped state, and configured to drive the motor with the drive voltage during a period when the pulse signal is at the one logic level after the motor starts rotating, based on a rotation signal corresponding to the rotation of the motor. | 2009-07-02 |
20090167220 | Motor control apparatus, vehicle fan drive apparatus, and motor control method - A motor control apparatus has a start control section. When the motor control apparatus receives a motor start command from a host control unit when a motor is in a stop state or a low-speed rotating state where a sensorless control cannot be applied, the control section starts the motor that rotates a vehicle fan by a forced commutation which supplies a pseudo sinusoidal drive signal caused by a complementary PWM control. Thereafter, the motor control apparatus switches over to a sensorless control using a rectangular wave drive signal at an energization angle of lower than 180°. | 2009-07-02 |
20090167221 | METHOD AND DEVICE FOR GENERATING SIGNALS FOR CONTROLLING A MULTI-PHASED ROTATING ELECTRIC MOTOR ACCORDING TO SPEED - A method wherein the signals (SW | 2009-07-02 |
20090167222 | METHOD AND DEVICE FOR DETERMINING THE TORQUE OF AN ELECTRIC MACHINE - A method for determining the torque of an electric machine, in particular a permanently energized electric machine. The torque is determined by a particularly simple and accurate method by measuring a phase voltage and the rotational speed of the electric machine and calculating the torque based on these values. | 2009-07-02 |
20090167223 | Inverter - An inverter contains the following structure: an inverter circuit having upper-arm switching elements connected on the positive side of a DC power source and lower-arm switching elements connected on the negative side of the DC power source; a current sensor that detects current flowing between the DC power source and the inverter circuit; and a control circuit that not only effects control of the inverter circuit so that AC is fed to a motor from the inverter circuit according to an ON-period controlled by a PWM system, but also makes a correction to the ON-period so as to allow the current sensor to detect phase current. The control circuit determines an amount of the correction by judging a direction of current of a phase having an intermediate length of the ON-period. | 2009-07-02 |
20090167224 | Motor Control Device and Motor-Driven Power Steering System Using the Same - An object of the present invention is to provide a motor control device capable of suppressing voltage composite vector fluctuation to increase the output of a brushless motor, and a motor-driven power steering system using this device. The present control device calculates motor phase current command values based on a target current and a rotor rotational position detection value, calculates voltage command values based on the motor phase current command values and phase current detection values, and supplies phase currents to a three-phase brushless motor based on the voltage command values. The present control device outputs the phase current command values so that the absolute value of a composite vector of respective phase drive voltages is substantially a value √3/2 times the power supply voltage. | 2009-07-02 |
20090167225 | Motor Drive Architecture with Active Snubber - A method and apparatus is disclosed for controlling a system comprising at least one electric motor. The motor drive circuit includes a reconfigurable active snubber. Under given resonance conditions, the active snubber is configured to use a resistive element to dissipate electrical transients across the commutation circuit. | 2009-07-02 |
20090167226 | Method for Controlling a Direct Current Brushless Motor, and Control Circuit - A method for controlling a direct current (DC) brushless motor, and a control circuit thereof are provided. The DC brushless motor is sensorless. In response to a digital output signal that is applied to drive the direct current brushless motor, detection of a back electromotive force (BEMF) is ceased in a predetermined time interval, so as to avoid detecting erroneous BEMF and keep normal operation of the direct current brushless motor. | 2009-07-02 |
20090167227 | Method and control device for monitoring and limiting the torque in a drive train of a road motor vehicle - A method for monitoring and limiting the output or the torque of a drive motor in a drive train of a road motor vehicle, including the steps of: determining a permissible maximum value of the output or the torque as a function of a signal from a driver input sensor; determining an actual value of the output or the torque, and comparing the actual value to the maximum value and triggering a measure that limits the output or the torque as a function of the comparison result. The method is characterized by the repeated formation of a difference from the actual value and the maximum value, formation of a sum of values of a function of the difference, comparison of a value of the sum to a threshold value, and initiation of the measures if the value of the sum is greater than the threshold value. An independent claim is directed to a control device, which is programmed to implement the method. | 2009-07-02 |
20090167228 | APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING SPEED OF A COOLING FAN - An apparatus, system, and method are disclosed for controlling fan speed. A power sensing module senses input voltage and current of a power supply. The power supply includes one or more stages and regulates at least one output bus. A power calculation module calculates input power from the input voltage and the input current. A temperature sensing module senses an ambient temperature and/or a temperature at a component cooled by a fan. A fan speed calculation module calculates a fan speed signal for the fan. The fan speed signal is a function of the input power calculated by the power calculation module and the sensed temperature sensed by the temperature sensing module for at least a portion of a fan speed range. A fan speed transmission module transmits the fan speed signal to the fan and adjusts a fan speed based on the fan speed signal. | 2009-07-02 |
20090167229 | AC Motor Bypass With Fault Annunication, Serial Communication And Fault Tolerant Coil Control - A motor bypass is controlled by a digital signal processor (DSP) with embedded control software that allows fault detection and annunciation, serial communications between both a variable frequency drive (VFD) and a bypass controller and the bypass controller and a host computer. The use of the DSP and embedded control software further allows for contactor coil control to provide fault tolerant operation as well as fault condition detection and annunciation to the user. | 2009-07-02 |
20090167230 | MOTOR DRIVING CIRCUIT AND MOTOR DRIVING METHOD - A motor driving circuit includes a detecting unit, a signal control unit, a comparing unit and a driving unit. The detecting unit detects a rotation speed of a motor and thus outputs a detecting signal. The signal control unit generates a reference signal. The comparing unit electrically connected with the detecting unit and the signal control unit, and receives the detecting signal and the reference signal and thus outputs a comparing signal. The driving unit electrically connected with the comparing unit, and receives the comparing signal and thus outputs a driving signal to drive the motor. | 2009-07-02 |
20090167231 | System and method for controlling electric motors to simulate a mechanical differential - System and methods of controlling a plurality of motors based on a motor motion attribute, such as rotor position, velocity, or acceleration, which simulate the properties of a mechanical differential, including a pure differential, a limited slip differential, and/or a locking differential. The method may be employed in a number of applications, including, without limitation, a paper handling system, such as an inserter, to control the nips of a pinless cutter of an inserter, and in a vehicle. | 2009-07-02 |
20090167232 | Drive control device for a stepper motor and drive control method of the stepper motor - A stepper motor control device includes a sensor that detects physical quantities and a control device that operates a stepper motor based on data corresponding to the physical quantities sent from the sensor in which the said control device implements a target rotational angle computation process that calculates a target rotational angle of a drive shaft of the stepper motor based on data corresponding to the physical quantities sent from the sensor, a target rotational angle change computation process that calculates a target rotational angle change which is a difference between a present rotational angle of the drive shaft of the stepper motor and the target rotational angle and a divisional target rotational angle computation process that equally divides the target rotational angle change by a first divisional target rotational angle within a range not exceeding a rotational limit for loss of synchronism of the stepper motor whereby the said control device is a drive control device of the stepper motor that drives the stepper motor by supplying to the stepper motor a second divisional target rotational angle which is a value calculated by the divisional target rotational angle computation process as a rotational angle per one control period. | 2009-07-02 |
20090167233 | Method of Manufacturing a Starting Device for a Three Phase Electric Motor, and a Starting Device - When manufacturing a starting device for a three-phase electric motor, especially a soft starter, in at least one embodiment an arc quenching system is at least partly removed from a commercially available contactor that so becomes to a modified contactor. In at least one embodiment, a modified contactor is used as a contactor in the starting device. | 2009-07-02 |
20090167234 | Converter device, rotating electrical machine control device, and drive device - A converter device includes a converter circuit that includes a reactor connected to a primary side power supply, and a step-up feeding device that has a step-up switching element connected to the reactor and that boosts electric power of the primary side power supply by on/off switching the step-up switching element and outputting a stepped-up electric power as a secondary voltage; a converter control device that PWM-controls on/off switching of the step-up switching element so that the secondary voltage becomes equal to a secondary target voltage; and a temperature detecting device that detects a temperature of the reactor, wherein the converter control device limits PWM-controlled on/off switching of the step-up switching element for step-up operation when the temperature of the reactor increases to a first predetermined value or higher. | 2009-07-02 |
20090167235 | APPARATUS FOR CONTROLLING INVERTER - The apparatus for controlling an inverter is disclosed which detects a rotation angle of a load using a current supplied to the load when the inverter utilizes a voltage/frequency control to control the driving of the load, and accurately drives the load using the detected rotation angle, where the current supplied to the load by the inverter is detected by a current sensor, and a rotation speed of the load is estimated by the detected current to be used for the driving of the load. | 2009-07-02 |
20090167236 | Control Apparatus for AC Rotary Machine and Control Method for AC Rotary Machine - A control apparatus for an AC rotary machine, comprising a VVVF inverter | 2009-07-02 |
20090167237 | FLEXIBLE POWER APPARATUS - A flexible power supply apparatus includes a flexible textile capacitor, a power source, a charging part, and a control circuit. The power source is electrically coupled with the flexible textile capacitor. The charging part for charging an electric product or a secondary battery is electrically coupled with the power source. The charging part and the flexible textile capacitor are connected in parallel. The flexible textile capacitor discharges a current to the charging part when the flexible textile capacitor is charged to a predetermined charging level. The control circuit for controlling the charging and discharging of the flexible textile capacitor, and the charging part is electrically coupled with the flexible textile capacitor the power source, and the charging part. | 2009-07-02 |
20090167238 | Method and system for float charging a battery - Float charging a battery comprises charging a battery to a reference voltage that is less than a maximum voltage of the battery. A power source provides power to a charging circuit. The circuit supplies a reference voltage. An operational amplifier float charges the battery to the reference voltage. A comparator determines whether the battery's voltage exceeds the reference voltage. Another comparator determines whether current through the battery exceeds a reference current. A thermistor determines whether the battery's temperature exceeds a safe range. A microprocessor monitors the inputs from the comparators and the thermistor and outputs of the circuit. If the comparators or the thermistor reports a safety fault to the microprocessor, the microprocessor shuts down the charging current to the battery. If an output circuit draws too much current from the battery, the microprocessor can disconnect the battery from the output circuit. | 2009-07-02 |
20090167239 | CHARGER - (EN) A charger which can charge a secondary battery suitably with a simple device without particularly requiring fuel supply control, and in which overload to a fuel cell is hard to occur. The charger comprises a fuel supply means ( | 2009-07-02 |
20090167240 | Electric battery booster - The device that I invented is used to save gas. It can be placed under the hood of any car. What makes my device different is that it has an electric panel and battery panel stored in the housing of the battery. It is then placed under the hood to be connected to the starter to ensure proper connection. It can also be switched from gas to electric and then back from electric to gas. | 2009-07-02 |
20090167241 | CHARGER DEVICE - A charger device includes a body, an AC power input port, a DC power input port, a battery insertion slot and a power output/input port. The body is provided therein with a circuit board. The AC power input port, the DC power input port and the power output/input port are electrically connected to the circuit. The battery insertion slot is provided on the body and electrically connected to the circuit board. Via this arrangement, a charge device can be obtained. Since the AC power input port and the DC power input port are provided simultaneously, the charger device can be used with different power sources and charge an electronic apparatus with the outputted power. | 2009-07-02 |
20090167242 | Discharge Control System - A discharge control system of an electric storage pack controls a discharge line connected from a plurality of electric rechargeable cells to a rotary inductive load or a load driving feeding circuit. The electric rechargeable cells are provided in series within the electric storage pack. The discharge control system includes cell voltage detection units which detects respective cell voltages of the plurality of electric rechargeable cells, a switch group including a plurality of switches connected between the plurality of electric rechargeable cells, and a control unit which controls individually the switches of the switch group in accordance with results of detections by the cell voltage detection units when a difference between a highest cell voltage and a lowest cell voltage in the electric rechargeable cells of the electric storage pack is equal to or smaller than a predetermined value and forms a discharge line from at least any one of the plurality of electric rechargeable cells to the rotary inductive load or the load driving feeding circuit. | 2009-07-02 |
20090167243 | Cell balancing systems with multiple controllers - In one embodiment, a cell balancing system includes a first controller for controlling cell balancing of a first set of cells coupled in series, and a second controller for controlling cell balancing of a second set of cells coupled in series. There is at least one common cell in the first set of cells and the second set of cells. | 2009-07-02 |
20090167244 | PROTECTION DEVICE FOR ASSEMBLED BATTERY AND ASSEMBLED BATTERY SYSTEM CONTAINING THE SAME - A protection device for an assembled battery includes a sampling capacitor, first switches and second switches to sample the voltages of the battery cells and hold the voltages in the capacitor, a detection unit which detects the voltages of the battery cells based on the voltage sampled by any one of the first switches and the second switches and held on the capacitor and output the detected value, a computing unit which computes an average value of the detected values, a comparator which compares the detected value with the average value so as to obtain a result of comparison indicating a relation in size between the both, and a controller which controls the first switches and the second switches, for the second switches to sample if the detected value obtained by sampling by the first switches is higher than the average value according to the comparison result. | 2009-07-02 |
20090167245 | BIDIRECTIONAL POWER MANAGEMENT TECHNIQUES - Power management techniques are disclosed. For instance, an apparatus may include a bidirectional voltage converter circuit, and a control module that selectively operates the bidirectional voltage converter circuit in a charging mode and a delivery mode. The charging mode converts a voltage provided by an interface (e.g., a USB interface) into a charging voltage employed by an energy storage module (e.g., a rechargeable battery). Conversely, the delivery mode converts a voltage provided by the energy storage module into a voltage employed by the interface. | 2009-07-02 |
20090167246 | BATTERY MODULE AND METHOD FOR DETERMINING BATTERY ID AND TEMPERATURE - A battery module for a portable electronic device is disclosed. The battery module is connected with the portable electronic device with at least three contacts. The battery module includes a battery, a recognition circuit, and a thermal sensing circuit. The recognition circuit has an energy storage element and a current limiting element, and the thermal sensing circuit has a switch and a thermal sensing element. The thermal sensing element varies its electric parameter in accordance with the temperature of the battery module. With the charging curve of charging the energy storage element by way of the current limiting element, the portable electronic device can determine a battery type, and the thermal sensing circuit is then initiated to acquire the thermal information of the battery module. | 2009-07-02 |
20090167247 | VOLTAGE BALANCE CIRCUIT FOR RECHARGEABLE BATTERIES - Voltage balance circuit for dual cell rechargeable battery having a balancing circuit coupled to an integrated control circuit. The balancing circuit can be configured to charge and discharge current during a voltage balancing process allowing a higher charged cell to discharge or dissipate excess capacity to a lower charged cell. The integrated control circuit, having a plurality of modules, can be configured to output balancing directional and timing control signals for signaling the activation and deactivation of the voltage balancing process. | 2009-07-02 |
20090167248 | State of Charge Equalizing Device and Assembled Battery System Including Same - A state-of-charge equalizing device equalizes the state of charge of each of cells connected in series to form an assembled battery, and comprises charging/discharging circuits connected in parallel to the respective cells to discharge and/or charge the respective cells, voltage measurement circuits connected to the respective charging/discharging circuits to measure the voltages across the respective cells, and a control circuit. The control circuit comprises a unit calculating an equalization target voltage based on the measured voltages before the charge or discharge starts, a unit starting discharging/charging the cells having a voltage thereacross different from the target voltage, a unit correcting the target voltage to thereby calculate a corrected equalization target voltage for each of those cells based on the difference between the measured voltages before and at a certain time period after the charging/discharging, and a unit ending the discharging/charging when the measured voltage reaches the corrected target voltage. | 2009-07-02 |
20090167249 | Method for verifying smart battery failures by measuring input charging voltage and associated systems - A method and associated system are disclosed for verifying charging failures for smart batteries by measuring input charging voltage and associated systems. In one embodiment, a determination is made whether or not a charging current is indicative of a battery failure by utilizing an analog-to-digital (A/D) port to measure the input charging voltage. As long as the measured input charging voltage is below the cell pack voltage or some set voltage value, whichever is higher, the BMU considers a charging current detection to be a false failure indication. If the measured charging voltage is above the cell pack voltage or a set voltage value, whichever is lower, the BMU considers the charging current detection to be a positive failure indication. The BMU can then disable the battery or implement other verification steps before disabling the battery, as desired. | 2009-07-02 |
20090167250 | ELECTRONIC DEVICE AND CHARGING CONTROL CIRCUIT - An exemplary charging control circuit includes a signal shaping unit, a first switch unit, and a second switch unit. The signal shaping unit receives a control signal, and is capable of reshaping the received control signal to have a time interval transited from a first state to a second state. The first switch unit receives the shaped control signal, and generates a first switching signal. The second switch unit receives the first switching signal, and is capable of being turned on based on the first switching signal for allowing electrical power to be outputted to a battery. | 2009-07-02 |
20090167251 | CHARGER PROTECTION DEVICE - A charger protection device ( | 2009-07-02 |
20090167252 | CHARGING SYSTEM AND CHARGER - A charger that charges a battery unit including a secondary battery, includes a receiving unit, a detection unit, a determination unit, and a control unit. The receiving unit receives, from the battery unit, battery state information indicating a state of the battery unit, if the secondary battery is being charged. The detection unit detects charge state information indicating the state of the battery unit, if the secondary battery is being charged. The determination unit determines, using the battery state information and the charge state information, whether the battery unit is in a normal state. The control unit controls charging of the secondary battery in the battery unit depending on whether the battery unit is in the normal state. | 2009-07-02 |
20090167253 | Charging circuit, charging system and charging method - A charging circuit includes: a connecting terminal for connection to a nonaqueous-electrolyte secondary battery; a heating portion heating the nonaqueous-electrolyte secondary battery; a charging portion charging the nonaqueous-electrolyte secondary battery connected to the connecting terminal; and a control unit which allows the charging portion to charge the nonaqueous-electrolyte secondary battery after allowing the heating portion to heat the nonaqueous-electrolyte secondary battery, lowers the temperature of the nonaqueous-electrolyte secondary battery, and allows the charging portion to further charge the nonaqueous-electrolyte secondary battery. | 2009-07-02 |
20090167254 | Multi-mode charging system for an electric vehicle - A method and apparatus that allows the end user to optimize the performance of an all-electric or hybrid vehicle and its charging system for a desired mode of operation is provided. The system of the invention includes multiple charging/operational modes from which the user may select. Each charging/operational mode controls the cut-off voltage used during charging and the maintenance temperature of the battery pack. | 2009-07-02 |
20090167255 | Voltage Regulation to Reduce Ripple in a Power Generation System - Methods and systems are disclosed for reducing alternating current ripples in direct current electrical power generation systems with one or more regulated permanent magnet machines. Ripple suppression is achieved, in one aspect, by modulating the control current of a regulated permanent magnet machine. | 2009-07-02 |
20090167256 | System and method for suppressing DC link voltage buildup due to generator armature reaction - A controller employed in conjunction with a synchronous generator monitors the output voltage of the generator. The controller employs the monitored output voltage as feedback that is used to control the excitation provided to an exciter field winding. In addition, the controller applies a control loop to the monitored output voltage that detects and modifies voltage ripple signals within the monitored output voltage to generate a compensated signal that is used to control the excitation to the exciter field winding. In particular, by detecting and modifying voltage ripple signals within the monitored output voltage, the controller is able to counteract armature reaction voltage ripples caused by unbalanced short-circuit faults, thereby preventing the build-up of voltage on the DC link. | 2009-07-02 |
20090167257 | SHORTED ROTATING DIODE DETECTION AND PROTECTION - An electric generator with a rotating diode fault detection device built in that operates by comparing a voltage buildup across the exciter DC supply with a preset threshold value and determining if a fault condition is present based on the comparison. | 2009-07-02 |
20090167258 | Magnetic torsion accelerator - An inexpensive means of using homopolar technology to test some aspects of magnetic shear and reconnection on a variety of solid, liquid, gaseous, and plasma substances | 2009-07-02 |
20090167259 | DC-DC CONVERTER, DC-DC CONVERTER CONTROL METHOD, AND ELECTRONIC DEVICE - The DC-DC converter includes a control unit that controls a current stored in an inductance and an output voltage output from an output terminal electrically couplable to the inductance. The control unit assigns a first period and a second period to a given period when the output voltage is lower than a given value in response to a load electrically couplable to the output terminal. The first period is where a current is stored in the inductance in response to an input voltage and a reference voltage, and the second period is where the current stored in the inductance is supplied to the output terminal in response to the input voltage and the output voltage. | 2009-07-02 |
20090167260 | Electrical Power Supply Arrangement and Use Thereof - A power supply arrangement is specified in which a capacitor with a low internal resistance, in particular a supercap ( | 2009-07-02 |
20090167261 | CURRENT MEASURING DEVICE - An embodiment of a current measuring device, defined by a gain, including an amplification module including an input for receiving a control signal, an input connected to an output node, brought to an output potential and traversed by an output current, a feedback node traversed by a mirror current associated with the output current by a proportionality coefficient equal to the gain, and an output traversed by the mirror current, and capable of bringing the feedback node to the output potential in response to the control signal. The measuring device also includes a gain modification module, mounted between the first potential and the feedback node, including at least one input for receiving an activation signal, and capable of modifying the value of the gain in response to an activation signal. | 2009-07-02 |
20090167262 | POWER CONVERTER - A power converter ( | 2009-07-02 |
20090167263 | Current limiting circuit and voltage regulator using the same - Techniques pertaining to a voltage regulator with a current limiting circuit having low quiescent current are disclosed. According to one aspect of the present invention, a current limiting circuit is provided for limiting a current passing through an output pass circuit of a voltage regulator, the current limiting circuit comprises: a current sampling circuit for sampling the current passing through the output pass circuit to obtain a duplicated current being proportional to the current passing through the output pass circuit; a current mirror circuit for producing a mirror current being proportional to the duplicated current with the duplicated current as a reference current; a current to voltage converter for producing a voltage being proportional to the mirror current; and a voltage comparator for comparing the voltage produced by the current to voltage converter with a threshold voltage and turning off the output pass circuit when the voltage produced by the current to voltage converter is larger than or equal to the threshold voltage. | 2009-07-02 |
20090167264 | DC-DC CONVERTER USABLE FOR DUAL VOLTAGE SUPPLY - A converter has a single inductor with a first terminal connectable to a first terminal of the supply input through a first power transistor and a second terminal connectable to a second terminal of the supply input through a second power transistor. A first rectifier element connects the first terminal of the inductor with a first output terminal, and a second rectifier element connects the second terminal of the inductor with a second output terminal. A resistive voltage divider is connected between the first and second output terminals. A control circuit uses an input from the voltage divider as a reference input voltage and provides an output current to the second terminal of the supply input in response to any voltage difference between the reference input voltage and the second terminal of the supply input. This provides a virtual common reference potential at the second terminal of the supply input, which is thus a common ground (GND) terminal. In the ON phase of both power transistors, the inductor is charged with current from the supply input. In the OFF phase (both power transistors are OFF), the energy stored in the inductor is supplied to both of the positive and the negative supply output through the rectifier elements, the output current in fact flowing almost exclusively between the positive and negative supply outputs. Thus, in the OFF phase, the inductor is entirely isolated from the supply input and the supply outputs are in no way affected by any transients or fluctuations in the supply input voltage. | 2009-07-02 |
20090167265 | CURRENT ZERO CROSSING DETECTOR IN A DIMMER CIRCUIT - A method and circuit for controlling the delivery of power having a current component to a load having an inductive component, the method comprising selectively switching power to the load with a switch, wherein the switch is caused to operate at the threshold of saturation during a conduction state such that the switch self commutates to its off state when the magnitude of the current through the load is substantially zero. The method and circuit may be used in a number of applications for detecting a current zero crossing and may be applied to circuits such as dimmer circuits. | 2009-07-02 |
20090167266 | FAULT PROTECTION CIRCUIT, METHOD OF OPERATING A FAULT PROTECTION CIRCUIT AND A VOLTAGE REGULATOR EMPLOYING THE SAME - Embodiments of the present disclosure provide a fault protection circuit, a method of operating a fault protection circuit and a voltage regulator. In one embodiment, the fault protection circuit is for use with the voltage regulator and includes an output power section having first and second MOS transistors configured to provide a regulated voltage on an output node of the voltage regulator. The fault protection circuit also includes a gate pull-down section connected to the first and second MOS transistors and configured to provide a gate pull-down MOS transistor to limit a current through the first and second MOS transistors during a current overload fault condition on the output node. | 2009-07-02 |
20090167267 | Power Converter with Monotonic Turn-On for Pre-Charged Output Capacitor - A power converter for and method of producing a monotonic rise in output voltage at start-up. In one embodiment, the power converter includes a switch and an error amplifier coupled to an output terminal of the power converter. The power converter also includes a comparator with an output terminal coupled to a control terminal of the switch and an input terminal coupled to an output terminal of the error amplifier configured to enable the switch to conduct for a duty cycle. Additionally, the switch is configured to be turned off at a start-up of the power converter until a voltage of the output terminal of the error amplifier provides a duty cycle for the switch corresponding to an output characteristic pre-charge condition. | 2009-07-02 |
20090167268 | Power Supply - A switching regulator for regulating an ac signal, and method of supplying power thereto are provided. The regulator includes a positive half cycle part and a negative half-cycle part arranged to regulate the respective parts of an input ac signal. Each half-cycle part comprises a modulating transistor, having an associated modulator diode, and a clamping diode arranged to protect the modulating transistor from reverse-bias voltages and having an associated clamp switch. The regulator further provides a first switching controller operable to cause the modulating transistors to switch and a second, separate switching controller operable to cause the clamp switches to switch. | 2009-07-02 |
20090167269 | BI-DIRECTIONAL DC POWER CIRCUIT - Bi-directional direct current (DC) power circuit having: a signal processing module for processing feedbacks of output voltage and voltage drop, and outputting pulse control and directional control signals; a pulse width modulation (PWM) module for outputting pulse signals in response to the control signals from the signal processing module; and a switch rectifying module for switching on and off in response to the pulse signals from the PWM module. The pulse control signal from the signal processing module can be in response to an input current signal from a sense resistor. The circuit is capable of achieving both step-up and step-down voltage conversions. | 2009-07-02 |
20090167270 | SUPPLY VOLTAGE CONTROL BASED AT LEAST IN PART ON POWER STATE OF INTEGRATED CIRCUIT - For one disclosed embodiment, switching voltage regulator circuitry may be controlled to supply a voltage to at least a portion of an integrated circuit. Information corresponding to a current load for a different power state of at least a portion of the integrated circuit may be received. The switching voltage regulator circuitry may be controlled to adjust the voltage to a different value based at least in part on the received information. For another disclosed embodiment, a voltage may be received for a power state of at least a portion of an integrated circuit having first logic to perform one or more functions and second logic integrated with the first logic. Information corresponding to a current load for a different power state of at least a portion of the integrated circuit may be sent from the second logic to voltage regulator control logic to adjust the voltage to a different value. Other embodiments are also disclosed. | 2009-07-02 |
20090167271 | ACTIVE TRANSIENT RESPONSE CIRCUITS, SYSTEM AND METHOD FOR DIGITAL MULTIPHASE PULSE WIDTH MODULATED REGULATORS - Disclosed is a multi-phase pulse width modulated voltage regulator and method in which transient voltage excursions or deviations that exceed the load line voltage by more than a predetermined amount are detected by an ATR circuit and a correction signal is applied. The correction signal is in the form of asynchronous pulses and the number of such pulses is a function of the magnitude of the voltage excursion as determined by the number of thresholds that are exceeded. Also disclosed is an adaptive voltage positioning (AVP) circuit and method for early detection of a transient event by sensing voltage changes at the load and adjusting the target voltage with pre-determined current values prior to the time that ATR event changes in the current at the load are detected. The AVP load line is pre-positioned for more precise current control. Also disclosed is an adaptive filter with adjustable frequency characteristics in response to an ATR event. Also disclosed is a pulse limiting circuit. Also disclosed is a tri-state implementation. Response to transient events is further improved with an external ATR circuit coupled to the load. | 2009-07-02 |
20090167272 | Power Supply Controller - A first current corresponding to the drain-to-source voltage of a power MOSFET can pass through an FET; and a second current corresponding to a constant voltage can pass through an FET; a third current corresponding to the difference determined by subtracting the first current from the second current can pass into threshold setting resistors from the connecting point between FETs. Consequently, divided voltages at the connecting points between the threshold setting resistors varies directly with a voltage corresponding to the difference determined by subtracting the drain-to-source voltage of the power MOSFET from the constant voltage. | 2009-07-02 |
20090167273 | VOLTAGE CONVERTER - An exemplary voltage converter includes a pulse width modulation controller chip, an enabling transistor, a first resistor, a pull-up transistor, a pull-down transistor, and a low pass filter. The pulse width modulation controller chip includes a plurality of pins, a gate control logic circuit, an enabling comparator, a first gate driver, a second gate driver, a current source, a first comparator, a power-on reset circuit, an inductor current sensor, a counter and current step generator, and an oscillator. The plurality of pins include a Vcc pin, a BOOT pin, a PHASE pin, a UGATE pin, a LGATE pin, and a pin OCSET. The current source, the first resistor, the inductor current sensor, the counter and current step generator, the oscillator, and the pull-down transistor constitute a light-load efficiency improvement circuit. | 2009-07-02 |
20090167274 | PWM CONTROLLER AND THE CHIP THEREOF - A PWM controller applied to a switching voltage regulator comprises a disabling circuit, a power-sensing circuit, an over-current protection circuit and a PWM logic circuit. The disabling circuit is connected to an external frequency compensation circuit for detecting a voltage used to stop the operation of the PWM controller. The power-sensing circuit is configured to stop the operation of the PWM controller if the input voltage of the high side switch is lower than a threshold. The over-current protection circuit is configured to monitor current flowing through the output circuit, and the over-current protection circuit generates an over-current protection signal when the current exceeds a threshold. The PWM logic circuit is connected to the outputs of the disabling circuit, power-sensing circuit and over-current protection circuit. | 2009-07-02 |
20090167275 | VOLTAGE REGULATOR FEEDBACK PROTECTION METHOD AND APPARATUS - An integrated circuit includes an output terminal. A plurality of feedback terminals receives a feedback signal. A voltage regulator has a feedback input in communication with the plurality of feedback terminals to receive the feedback signal. The voltage regulator has a power output in communication with the output terminal. The voltage regulator is responsive to the feedback signal to generate the power output. | 2009-07-02 |
20090167276 | Soft-Start Circuit and Method Thereof - A soft-start circuit and a method thereof are described. The circuit includes an amplifier and a voltage ramp generator. The amplifier has a first input end, a second input end, an output end, and a power source control end. The first input end is coupled to a reference voltage. The second input end is coupled to a feedback voltage. The output end outputs an output voltage, and the feedback voltage corresponds to the output voltage. The voltage ramp generator is coupled to the power source control end, and generates a ramp-up voltage. When the ramp-up voltage is lower than a threshold value, the output voltage rises with the ramp-up voltage. When the ramp-up voltage is not lower than the threshold voltage, the output voltage remains at a stable value. A surge current occurring during smooth soft-start or even in operation is thus prevented. | 2009-07-02 |
20090167277 | Common-Mode Voltage Generator for a Battery-Supplied Handset Apparatus - A common-mode voltage generator for a battery-supplied apparatus is provided with a battery voltage ripple-insensitive sensor comprising a voltage dividing circuit and a number of hysteresis comparators, by means of which a battery voltage, or a fraction thereof is compared with a series of reference voltages. These reference voltages are derived from an on-chip voltage by means of said voltage dividing circuit. The hysteresis of said hysteresis comparators is larger than the ripple on said battery voltage. Further there is an adjustable regulation loop. The sensor detects a battery voltage range and adjusts the regulation loop on the basis of this range. The regulation loop provides an output commonmode voltage, which is equal to a fraction, preferably half the battery voltage. | 2009-07-02 |
20090167278 | Power Supply with Separate Line Regulation and Load Regulation - A system to supply power to an electronic system, comprises a set of one or more power units each configured to transform an input voltage into an output voltage; and a line regulator coupled to a power unit and configured to modulate a duty cycle of the power unit and a load regulator configured to provide a second control signal to a power unit to selectively enable the power unit based on load information provided by the electronic system. | 2009-07-02 |
20090167279 | DC Power Converter and Mode-Switching Method - A DC converter and a mode-switching method used in an electronic apparatus are included. The electronic apparatus includes a subsystem circuit. The DC power converter comprises a first voltage converting circuit electrically connected to the subsystem circuit, receiving a system voltage and a first reference voltage, and converting the system voltage to a first output voltage based on the first reference voltage; and a second voltage converting circuit electrically connected to the subsystem circuit and receiving the system voltage and a second reference voltage, and converting the system voltage to a second output voltage to the same output end of the first voltage converting circuit based on the second reference voltage; wherein the second voltage converting circuit outputs the second output voltage to the subsystem circuit when the first output voltage at the output end is smaller than a threshold. | 2009-07-02 |
20090167280 | Voltage Generating Circuit - A voltage generating circuit for generating a plurality of associated voltages includes a constant current source for generating a constant current; a plurality of resistors connected in series to the constant current source in series for generating a plurality of associated reference voltages; and a first controlled switch connected to a first resistor in parallel, wherein the plurality of associated reference voltages are changed by optionally conducting the first controlled switch to control the flow of the constant current through the first resistor. | 2009-07-02 |
20090167281 | BANDGAP REFERNCE VOLTAGE GENERATING CIRCUIT - A bandgap reference voltage generating circuit, includes: at least two bipolar transistors; an operational amplifier; a first PMOS transistor; and a second PMOS transistor whose source is connected to the upper limit power supply voltage and which supplies the reference current to the bipolar transistors. Further, the bandgap reference voltage generating circuit includes a third PMOS transistor whose source is connected to the upper limit power supply voltage; a fourth PMOS transistor whose source is connected to the upper limit power supply voltage and gate is connected to a drain of the third PMOS transistor; a first NMOS transistor whose source is connected to the lower limit power supply voltage and drain is connected to a drain of the fourth PMOS transistor; and a second NMOS transistor whose drain is connected to the operational amplifier and gate is connected to the drain of the first NMOS transistor. | 2009-07-02 |
20090167282 | VOLTAGE REGULATOR AND METHOD OF CALIBRATING THE SAME - A voltage regulator is provided that includes a power cell to provide a calibrated output voltage based on a voltage identification (VID) offset, and a master controller to provide a VID code to the power cell. The power cell to calibrate the output voltage based on the VID code received from the master controller and based on the VID offset. | 2009-07-02 |
20090167283 | CIRCUIT FOR MULTIPLEXING DIGITAL AND ANALOG INFORMATION VIA SINGLE PIN OF DRIVER FOR SWITCHED MOSFETS OF DC-DC CONVERTER - Multiple characteristics of a DC-DC converter, such as its mode of operation (e.g., either forced continuous conduction mode, or discontinuous conduction mode), and an operational parameter (such as the dead-time between switching times of the output switching devices (upper and lower MOSFETs) of the converter, whose associated driver integrated circuit has a pin usage that leaves only a single pin available for auxiliary purposes, are programmed by a single pin-based digital and analog information extracting circuit that couples both digital information and analog information within the same control signal to the driver IC by way of only the one available pin. | 2009-07-02 |
20090167284 | MULTI-MAGNETIC DEVICE - In some embodiments an inductor is external to a tightly coupled transformer. The inductor is coupled in series with at least one input of the tightly coupled transformer, and the inductor does not rely on any leakage inductances of the tightly coupled transformer. The tightly coupled transformer and the inductor are included in the same package. Other embodiments are described and claimed. | 2009-07-02 |
20090167285 | RESONANCE CIRCUIT FOR USE IN H-BRIDGE DC-DC CONVERTER - The present invention discloses a resonance circuit for use in an H-bridge DC-DC converter, the resonance circuit comprising: an H-bridge converter, capable of converting unstable DC power into stable DC power; a first resonance circuit, disposed on a buck side of the H-bridge converter for reducing the turn-off loss of a first active switching element; and a second resonance circuit, disposed on a boost side of the H-bridge converter for reducing the turn-on loss of a second active switching element. The H-bridge converter comprises: a first active switching element and a second active switching element; a coupled inductor with dual windings capable of storing energy; and a first passive switching element and a second passive switching element. The first resonance circuit comprises: a first inductor, a second inductor, a first auxiliary inductor, a first passive switching element, a second passive switching element and a first auxiliary capacitor, wherein the second inductor comprises a primary winding and an auxiliary winding. The second resonance circuit comprises: a second auxiliary inductor, a third active switching element, a first auxiliary inductor, a first passive switching element, a fourth passive switching element, a third capacitor, a fourth capacitor and a second auxiliary capacitor. | 2009-07-02 |
20090167286 | Cable Detection System - A cable detection system, includes a source of an input electrical AC signal for coupling to a first lead pin of a cable connector. A detector is coupled to a different second lead pin of the cable connector. The detector detects an electrical AC output signal derived by capacitive coupling of the input electrical AC signal occurring within a cable incorporating first and second leads corresponding to the first and second lead pins. The detector further enables a determination of whether the cable is connected to the cable connector in response to an amplitude dependent characteristic of the detected AC output signal. | 2009-07-02 |