25th week of 2010 patent applcation highlights part 23 |
Patent application number | Title | Published |
20100156294 | DISCHARGE LAMP HAVING A CATHODE WITH CARBON SOLID-SOLVED IN A TUNGSTEN METAL SUBSTRATE OF THE CATHODE - A discharge lamp having a cathode containing lanthanum oxide (La | 2010-06-24 |
20100156295 | ELECTRODELESS BULB, AND ELECTRODELESS LIGHTING SYSTEM HAVING THE SAME - Disclosed are an electrodeless bulb ( | 2010-06-24 |
20100156296 | IMAGE DISPLAY APPARATUS - An image display apparatus has a plurality of phosphor films two-dimensionally disposed on a substrate, a matrix-pattern rib formed on the substrate to partition between the phosphor films, a plurality of metal backs each covering at least one phosphor film, and resistance wirings having a sheet resistance higher than that of the metal backs for electrically connecting the plurality of metal backs to each other. The resistance wirings are disposed to the apexes of the matrix-pattern rib and composed of a plurality of column lines and a plurality of row lines, the metal backs have first portions for covering the phosphor films on the substrate and second portions formed along the rib to connect the first portions to the column lines. | 2010-06-24 |
20100156297 | COLOR VARIABLE FIELD EMISSION DEVICE - A field emission device having a simple structure and capable of readily changing emission colors of light by adjusting emission intensity of red, green and blue light is provided. In the field emission device, current that flows into each cathode electrode block is adjusted according to a very low control pulse signal of 0 to 5 V with a predetermined voltage applied to an anode electrode and a gate electrode over time, so that emission intensities of red, green and blue are individually adjusted. Therefore, the current that flows into each cathode electrode block is adjusted in a simple manner using a control pulse signal of a low level without a separate pulse driving high-voltage power supply, so that emission intensities of red, green and blue can be arbitrarily adjusted and emission colors of the field emission device can be readily changed. | 2010-06-24 |
20100156298 | LED Lighting Arrangement - An LED lighting arrangement comprising at least one LED, for producing light is disclosed. A power supply provides power for the at least one LED. At least one control circuit is coupled to the at least one LED in a way that directly or indirectly uses, to power the at least one control circuit, one or more forward voltage drops across the at least one LED. Beneficially, one or more additional control circuits can be added without redesign of the power supply for the at least one LED. | 2010-06-24 |
20100156299 | Ballast for a Discharge Lamp With Adaptive Preheating - The present invention relates to an electronic ballast for discharge lamps (LA) which have preheatable electrodes (E | 2010-06-24 |
20100156300 | Plasma excitation module - A plasma excitation module including a chamber, a plurality of coils and a multi-duct gas intake system is provided. The chamber has a dielectric layer. The coils are disposed at an outer side of the dielectric layer, and the coils are separated from each other by an interval and in parallel connection. The multi-duct gas intake system surrounds the dielectric layer and is communicated with the chamber. | 2010-06-24 |
20100156301 | ELECTRODELESS PLASMA LAMP AND DRIVE CIRCUIT - An electrodeless plasma lamp and a method of controlling operation of a plasma lamp are provided. The plasma lamp may a power source to provide radio frequency (RF) power and a lamp body to receive the RF power from a feed. The lamp body may comprise a dielectric material having a dielectric constant greater than 2 and bulb is provided that contains a fill that forms a plasma that emits light when at least a portion of the RF power is coupled to the fill. A light guide directs light from the bulb to a photosensor that is shielded from light output from a front side of the lamp body. The lamp includes a drive circuit to control operation of the lamp based on a level of light detected by the photosensor. | 2010-06-24 |
20100156302 | Method of Driving a Light Source, Light Source Apparatus for Performing the Method and Display Apparatus Having the Light Source Apparatus - A light source apparatus includes a light source module, a light sensor, a data converter, a light source controller and a light source driver. The light source module includes a light source. The light sensor generates sensing data by sensing the amount of light generated from the light source. The data converter converts the sensing data which exceeds a maximum value of reference data of a control range into converted sensing data within the control range. The light source controller generates a control signal for controlling the amount of light from the light source based upon the sensing data corresponding to no more than the maximum value or based upon the converted sensing data. The light source driver drives the light source by providing the light source with a driving signal based upon the control signal. | 2010-06-24 |
20100156303 | Wind power plant and method for operating obstacle or hazard lighting of a wind power plant - A method for operating obstacle or hazard lighting of a wind power plant with a red beacon unit and a white beacon unit is provided. The red beacon unit is operated 24 hours a day and the white beacon unit is switched on and off, depending on the ambient brightness. | 2010-06-24 |
20100156304 | LIGHTING CONTROL SYSTEM HAVING A TRIM CIRCUIT - A lighting control system suitable for a surgical lighting device. The lighting control system includes circuitry that compensates for the effects of temperature changes in a lighting device, and that compensates for forward voltage variations among LED lighting modules to provide substantially uniform light output. | 2010-06-24 |
20100156305 | FIELD EMISSION DEVICE - Provided is a field emission device having a simple structure and capable of pulse driving and local dimming. The field emission device turns a current flowing from each cathode electrode block on or off in response to a switching control signal having a very low voltage ranging from 0 to 5 V while a constant voltage is applied to an anode electrode and a gate electrode to control a field emission current. Compared with a conventional field emission device, the field emission device having a simple structure is capable of pulse driving and local dimming without using a separate pulse driving high voltage power source. | 2010-06-24 |
20100156306 | BACKLIGHT DRIVING SYSTEM - A backlight driving system driving a plurality of lamp groups comprises a phase controller, a pulse width module (PWM) controller, a plurality of power stages, a plurality of transformers and a plurality of switch circuits. The phase controller generates a plurality of phase signals. The PWM controller generates PWM signals. | 2010-06-24 |
20100156307 | POWER SUPPLY FOR LIGHT EMITTING DIODE DISPLAY - There is provided a power supply for a light emitting diode display using a light emitting diode as a backlight unit that unites a DC power supply provided from outside the light emitting diode display and a driving power supply provided inside the light emitting diode display. A power supply of a light emitting diode display according to an aspect of the invention may include: a power conversion unit converting commercial AC power into at least one driving power having a predetermined voltage level; and a backlight driving unit generating a backlight driving signal using the driving power from the power conversion unit, wherein the power conversion unit and the backlight driving unit are mounted onto one printed circuit board. | 2010-06-24 |
20100156308 | ADJUSTABLE OUTPUT BALLAST FOR POWERING BOTH FLUORESCENT LAMPS AND LED LAMPS - A ballast is provided for powering either of a fluorescent lamp or an LED lamp. The ballast includes a power supply and a pair of switching elements connected in series and coupled across an output end of the power supply. A voltage is provided across a pair of lamp output terminals coupled to the switching elements during a predetermined time period after startup of the ballast. A current condition is detected across the pair of lamp output terminals during the predetermined time period. Based on the detected current condition, the presence of a fluorescent lamp or an LED lamp connected to the ballast may be determined, and either of a first or second voltage output is provided across the lamp output terminals suitable for powering the appropriate lamp after lapsing of the predetermined time period. | 2010-06-24 |
20100156309 | LED ILLUMINANT DRIVING CIRCUIT AND AUTOMATIC BRIGHTNESS COMPENSATION METHOD THEREOF - An LED illuminant driving circuit and an automatic brightness compensation method thereof are provided herein. The automatic brightness compensation method includes: providing a target value; detecting an operation period of a pulse of an output of the LED illuminant driving circuit, the pulse is adapted to an LED illuminant for making the light emitting; deciding a peak value according to the target value and the operation period; and setting a peak level of the pulse according to the peak value. The LED illuminant driving circuit and the automatic brightness compensation method thereof provides a stable average current/voltage to the LED illuminant and avoids brightness variations of the light emitting. | 2010-06-24 |
20100156310 | LOW FREQUENCY ELECTRODELESS PLASMA LAMP - An electrodeless plasma lamp and a method of generating light are provided. The plasma lamp may comprise a power source to provide radio frequency (RF) power, and a bulb containing a fill that forms a plasma when the RF power is coupled to the fill. The plasma lamp further comprises a resonant structure having a quarter wave resonant mode. The resonant structure includes a lamp body comprising a dielectric material having a relative permittivity greater than 2, an inner conductor, and an outer conductor. The power source is configured to provide the RF power to the lamp body at about a resonant frequency for the resonant structure. | 2010-06-24 |
20100156311 | Electronic Device and Light Emission Control Method For Electronic Device - In an electronic device having a light emitting section that emits light by utilizing recombination of electrons and holes and in a light emission control method for this electronic device, an electronic device and a light emission control method for this electronic device are provided in which lifetime improvement is achieved in the light emitting section. | 2010-06-24 |
20100156312 | ELECTRONIC BALLAST FOR RESTARTING HIGH-PRESSURE DISCHARGE LAMPS IN VARIOUS STATES OF OPERATION - A high-pressure discharge lamp ballast is provided for igniting and re-igniting a high-pressure discharge lamp in various states of operation. A power supply circuit is coupled to a power source and supplies AC power to the lamp. An ignition voltage generating circuit supplies a high-voltage ignition pulse for igniting the lamp. A pulse control circuit alternatively controls the ignition voltage generating circuit in a first control mode to provide the high-voltage ignition pulses for a first time period and in a second control mode to delay the high-voltage ignition pulses for a second time period. An abnormality detection circuit detects an abnormal lighting state of the lamp wherein a measured condition of the lamp corresponds to a predetermined condition. The pulse control circuit increases a ratio of the second time period relative to the first time period upon detection of an abnormal lighting state of the lamp by the abnormality detection circuit. | 2010-06-24 |
20100156313 | Stepwise repairing for electrode of discharge lamp - A drive device that drives a discharge lamp including first and second electrodes includes a lighting circuit, a current control unit, a deformation detection unit, a current modulation unit, and a modulation enhancement unit. The lighting circuit supplies alternating current to the electrodes. The current control unit regulates the lighting circuit to control the alternating current. The deformation detection unit detects deformation of the surface shape of the electrodes. The current modulation unit modulates the controlled alternating current when the deformation is detected. The modulation enhancement unit increases a modulation ratio when the deformation is detected while modulating the alternating current. | 2010-06-24 |
20100156314 | Light source driver circuit - A light source driver circuit includes a voltage input terminal, a light source module, a transformer module, a voltage regulator module, a first switch and a control module. The voltage input terminal receives an input voltage. The light source module includes a plurality of light-emitting units. The transformer module is electrically connected to the light-emitting units. The voltage regulator module connected to the voltage input terminal provides a stable output voltage. The first switch electrically connected to the transformer module and the voltage regulator module receives the stable output voltage to determine whether the first switch is to be turned on or off. The control module is electrically connected to the first switch. The control module and the first switch are controlled so that the light source module the input voltage can be drived by the input voltage. | 2010-06-24 |
20100156315 | LED DRIVER WITH FEEDBACK CALIBRATION - Power management in a light emitting diode (LED) system having a plurality of LED strings is disclosed. A voltage source provides an output voltage to drive a plurality of LED strings. An LED driver implements a feedback mechanism to monitor the tail voltages of the active LED strings to identify the minimum tail voltage and adjust the output voltage of the voltage source based on the lowest tail voltage. A loop calibration module of the LED driver calibrates the feedback mechanism of the LED driver based on a relationship between a digital code value used to generate a particular output voltage and another digital code value generated based on the minimum tail voltage resulting from the particular output voltage. | 2010-06-24 |
20100156316 | LIGHT SOURCE APPARATUS AND DRIVING CIRCUIT THEREOF - A light source apparatus and a light source driving circuit are provided. The light source driving circuit includes an operation amplifier (OP-AMP), a transistor, and a switch unit. A first input terminal and an output terminal of the OP-AMP couple to a predetermined voltage and a control terminal of the transistor, respectively. A first terminal of the transistor couples to a light source. The switch unit includes a first signal terminal receiving a first voltage greater than a predetermined voltage, a second signal terminal coupled to a second input terminal of the OP-AMP, a third signal terminal coupled to a second terminal of the transistor, and an enabling terminal receiving a driving voltage. A voltage of the third signal terminal or a voltage of the first signal terminal is determined to transmit to the second signal terminal in accordance with the driving voltage. | 2010-06-24 |
20100156317 | LIGHT-EMITTING ELEMENT DRIVING CIRCUIT - A light-emitting element driving circuit includes a PWM signal output circuit configured to output a plurality of PWM signals each having one logic level whose duty ratio corresponds to gradation data and each corresponding to each of a plurality of light-emitting elements, on the basis of the gradation data indicating brightness of each of the plurality of light-emitting elements. A driving signal output circuit is configured to change the duty ratio of each of the plurality of inputted PWM signals to output the plurality of changed PWM signals as a plurality of driving signals, on the basis of instruction data for changing the brightness of the plurality of light-emitting elements. A driving circuit is configured to drive the plurality of light-emitting elements on the basis of a duty ratio of each of the plurality of driving signals. | 2010-06-24 |
20100156318 | Light Source System For Use With Medical Devices - A light source system adapted to embrace the head of the scope of a C-Arm Fluoroscopic machine. The light source system comprises of a cylindrical hollow frame having an outer surface and an inner surface defining an aperture for passage of the head of a scope of a C-Arm Fluoroscopic machine. Retained within the frame is a plurality of light emitting sources which are electrically connected to a power source. The frame consists of two semi-circular portions that are releasably connected by a fastening means for attachment to the head of a scope of a C-Arm Fluoroscopic machine. The light source system further includes a sterile hollow drape connected to the upper face of the frame. The sterile hollow drape is adapted to cover the C-Arm Fluoroscopic machine. The light source system also further includes a transparent grid sheet attached to the lower face of the frame whereby the plurality of light sources reflect a grid pattern projected form the transparent grid sheet. | 2010-06-24 |
20100156319 | LED Lighting System with Accurate Current Control - A light emitting diode (LED) lighting system and method are disclosed. The LED lighting system and method include an LED controller to accurately control a current in an LED system. The LED controller includes components to calculate, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system wherein the LED current time period is duty cycle, modulated at a rate of greater than fifty (50) Hz and to utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period. The LED system and method further involve components to compare the actual charge amount to a desired charge amount for the active time period and compensate for a difference between the actual charge amount and the desired charge amount during the future active time period. | 2010-06-24 |
20100156320 | LED CIRCUIT WITH HIGH DIMMING FREQUENCY - A LED circuit comprises: an inductor, a group of LEDs, a capacitor, a power MOS and a switching circuit. The inductor is connected to a voltage supply and a first node; the group of LEDs is connected to the first node and a ground potential; the capacitor is connected to the first node and a ground potential; the power MOS is connected to the first node and a ground potential, wherein the gate of the power MOS receives a switching signal such that the capacitor is charged when the power MOS is turn on to further turn on the LEDs and the capacitor is discharged when the power MOS is turn off to turn off the LEDs. The switching circuit is to generate the switching signal. | 2010-06-24 |
20100156321 | Lamp Driving Device - A lamp driving device includes a DC power supply, a square wave switch, a square wave controller, a plurality of lamps, a starting transformer, and a common transformer; a plurality of starting transformers and a plurality of common transformers are disposed at both sides of the plurality of lamps respectively, the plurality of starting transformers and the plurality of common transformers can have their primary sides or secondary sides cascaded and connected to the square wave switch; the present invention can effectively control the output power to the lamps, reduce the size and the temperature of the device, and improve the overall efficiency by connecting the primary sides or secondary sides in series. | 2010-06-24 |
20100156322 | LOW POWER NON-ISOLATED DRIVER - The present invention mainly discloses low power non-isolated driver that can be used for LED lighting and other non-isolated power supply appliance, in which the input side is connected to an AC or DC input, a PWM control circuit is connected to the buck converter switch, a capacitor filters the output voltage ripple and an output voltage/current control circuit provides feedback signal to the PWM control circuit. The present invention has such features of less component number, low total cost, high reliability, and better line/load regulation. | 2010-06-24 |
20100156323 | Light emitting device driver circuit and method for driving light emitting device - The present invention discloses a light emitting device driver circuit and a method for driving a light emitting device. The circuit comprises: a power stage performing power conversion on an input voltage to supply an output current to one or more light emitting devices; and a control circuit sensing the output current of the power stage to feedback control the power stage accordingly. | 2010-06-24 |
20100156324 | LED DRIVER CIRCUIT WITH OVER-CURRENT PROTECTION DURING A SHORT CIRCUIT CONDITION - An LED driver circuit is provided for protecting one (or more) LEDs connected in series from over-current damages which may result from a short circuit condition. The driver circuit includes a current control circuit for receiving an input signal from a power source and providing a current output for powering the LED. A voltage sensor detects a voltage across the LED. An LED current restriction circuit such as a switching element restricts a current flow into the LED. A short circuit response circuit controls the LED current restriction circuit dependent on a comparison between the voltage detected by the voltage sensor and a predetermined threshold value. When the detected voltage is less than or equal to the threshold value, the response circuit determines a short circuit, and a signal is sent to the current restriction circuit to restrict current flow into the one or more LEDs. | 2010-06-24 |
20100156325 | HIGH EFFICIENCY POWER CONDITIONING CIRCUIT FOR LIGHTING DEVICE - A power conditioning circuit in a light bulb efficiently converts an Alternating Current (AC) input voltage into Direct Current (DC) power for operating LEDs in the light bulb. The power conditioning circuit discharges capacitors when a voltage level of the input voltage drops below a given voltage necessary to operate the LEDs. The capacitors are then recharged when the input voltage is high enough to power the LED. The capacitors are configured to operate as voltage dividers while being charged thus reducing a peak voltage level of the output voltage used for powering the LEDs. The reduced output voltage reduces the overall amount of energy used by the light bulb and reduces the amount of heat radiated by the light bulb. | 2010-06-24 |
20100156326 | ELECTRONIC CANDLE - An electronic candle includes a bottom seat on which is a circuit board. The circuit board includes at least a first illuminating element, the bottom seat contains a control set which is coupled with the circuit board, and the bottom seat is covered by a cap, an upper part of which is a candle sheath approximately in a candle shape. An interior of the candle sheath receives at least a second illuminating element, and the upper part of the cap is provided additionally with a speaker. The first illuminating element can produce a flashing effect following rhythm, through collaboration of the control set and the circuit board. The circuit board is provided with a storage unit to store a music file, such that a user can store an MP3 file or an MP4 file into the storage unit, to facilitate listening in a later time. | 2010-06-24 |
20100156327 | Portable Electronic Device with Touch Illumination Function and Touch Illumination Method Thereof - A portable electronic device with a touch illumination function and a touch illumination method thereof are provided. The portable electronic device with the touch illumination function includes an input module, a touch sensor, and an illumination module. The touch sensor is disposed around the input module, senses a touch motion of the input module, and generates a touch signal according to the touch motion. The illumination module is disposed around the input module, coupled with the touch sensor, and controls the illumination module to generate a light source to illuminate the input module according to the touch signal. | 2010-06-24 |
20100156328 | METHOD OF CONTROLLING MOTOR IN IMAGE READING APPARATUS - Disclosed herein is a method of controlling a motor in an image reading apparatus. It may be possible to optimize the drive current of the motor for driving the movement of the scanning module by using information associated with, for example, the time it takes for the scanning module to return to a home or rest position after the scanning module is moved from the home position to a predetermined position. Such optimized drive current can result in improvements in the reading performance of an image by the image reading apparatus and reduction of power consumption. | 2010-06-24 |
20100156329 | Bidirectional different speed ratio electric motor driving device with bidirectional input - The present invention discloses that the output end of the electric motor capable of being operated in bidirectional rotation is transmitted to the input end of different rotating speed ratio and direction output transmission device, and it is through the output end of the different rotating speed ratio and direction output transmission device to further provide different directional rotating output for driving the rotating load, wherein the user can operatively control the driving input direction to provide different rotating directional different speed change ratio output in different driving input direction. | 2010-06-24 |
20100156330 | APPARATUS FOR CONTROLLING PERMANENT-MAGNET ROTARY ELECTRIC MACHINE - It is an apparatus for controlling a permanent magnet rotary electric machine. After the apparatus controls a current control portion in a state, in which a rotor of the permanent magnet rotary electric machine rotates at a constant speed, to supply a predetermined current to an armature, the apparatus performs a dq vector control process by determining a predetermined temporarily set value as a magnetic pole position correction quantity while a d-axis current command value and a q-axis current command value in the dq vector control process performed on a dq coordinate system that has a d-axis extending in the direction of a magnetic field of the permanent magnet of the rotor and a q-axis extending in a direction perpendicular to the d-axis. Then, the apparatus obtains the magnetic pole position correction quantity based on a predetermined operation expression using the d-axis voltage command value and the q-axis voltage command value which are obtained when the dq vector control process is performed. | 2010-06-24 |
20100156331 | DEVICE FOR CONTROLLING A POLYPHASE ROTATING MACHINE - A device for controlling a polyphase rotating machine, the machine comprising a stator, a rotor, and sensors, the device being capable of receiving: at least one first sensing signal (U; V; W) representing a position of the rotor relative to the stator and output by a first sensor; and a second sensing signal (V; W; U) representing the position and phase-shifted relative to the first signal and output by a second sensor. The control device comprises: means (K, R) for combining the first and second sensing signals into a combined signal, the means including at least one controlled switching element capable adopting at least in two states, the combined signal being based on a state of the first element and enabling the machine to be controlled. | 2010-06-24 |
20100156332 | COMPENSATING SYSTEM AND METHOD FOR COGGING TORQUE OF MOTOR - A compensating system for compensating a cogging torque of a motor includes a speed measuring apparatus, a moment of inertia measuring apparatus, a rotor position sensor, a processor, a plurality of band-pass filters, and a current control apparatus. The processor receives a speed, a moment of inertia, and a rotor position of the motor, to determine the cogging torque of the motor. Each band-pass filter is arranged with a different frequency to filter different frequencies of waveforms of the cogging torque. The processor determines a Fourier transformation of the cogging torque according to a number of Fourier coefficients from the band-pass filters, a cogging torque at a preset rotor position, and a cogging current according to the Fourier transformation of the cogging torque. The current control apparatus outputs a current opposite to the cogging current, to compensate the cogging torque of the motor. | 2010-06-24 |
20100156333 | Motor control device and drive device for hybrid vehicle - A hybrid drive device includes a first motor; an operative mechanism that drivingly connects the first motor to an engine of a vehicle; a second motor that is drivingly connected to a drive wheel; an engine rotation speed sensor that detects a rotation speed of the engine; a magnetic pole position sensor that detects a magnetic pole position of the second motor; a current sensor that detects a current flowing to the first motor; a sensorless motor control device that estimates a magnetic pole position of the first motor based on the current detected by the current sensor, and drivingly controls the first motor; and a second motor control device that drivingly controls the second motor based on the magnetic pole position detected by the magnetic pole position sensor. | 2010-06-24 |
20100156334 | Sensorless motor control device - A sensorless motor control device includes a magnetic pole position estimating unit that does not use a sensor to detect a magnetic pole position of a motor having a salient rotor, and overlays a high-frequency current on the motor to estimate the magnetic pole position of the rotor of the motor; and a high-frequency current control unit for changing a magnitude of the high-frequency current based on a magnitude of one of a torque and a current of the motor. | 2010-06-24 |
20100156335 | METHOD OF DETERMINING THE GAIN OF A BEMF AMPLIFIER AND RELATIVE CONTROL CIRCUIT OF AN INDUCTION ELECTRIC MOTOR - A method for determining gain of a back-electromotive force amplifier may include setting an electric motor into a tri-state function mode and storing a first quasi steady-state value for back-electromotive force from the difference signal, and forcing a reference current through the electric motor and determining a first value of the gain of the amplifier for equaling a difference signal to the first quasi steady-state value. The method may further include setting the electric motor into a tri-state function mode a second time and storing a second quasi steady-state value for back-electromotive force from the difference signal, and increasing the first value of the gain by an amount proportional to a difference between the second quasi steady-state value and the first quasi steady-state value. | 2010-06-24 |
20100156336 | LOW SPEED CONTROL METHOD AND APPARATUS FOR SERVO MOTOR - A low speed control method and an apparatus for a servo motor. The control apparatus comprises: an encoder capable of acquiring a speed signal from a servo motor and encoding the speed signal to output a low-resolution encoded signal; an insertion calculation unit capable of receiving the low-resolution encoded signal from the encoder to be processed by an interpolation operation for converting the low-resolution encoded signal into a high-resolution encoded signal to be outputted therefrom; a servo control chip capable of setting internal parameters and receiving the high-resolution encoded signal from the insertion calculation unit to be processed by a calculation process so as to output a switch control instruction; and a power module capable of receiving the switch control instruction from the servo control chip and then transmitting the same to the servo motor for adjusting the operation speed of the servo motor. | 2010-06-24 |
20100156337 | APPARATUS AND METHOD FOR DRIVING 2-PHASE SRM MOTOR - Disclosed is an apparatus and method for driving a 2-phase SRM. The method comprises initializing 2-phase based on a detected position of a rotor by an initializing sensor at the time of an initial driving, and normally driving 2-phase based on a detected position of the rotor by a driving sensor. Accordingly, a sufficient amount of torque is generated when the 2-phase SRM is driven at a high speed. The apparatus comprises an initializing sensor which detects each position of each phase of a 2-phase SRM, and generates an initializing sensor signal based on the detected result; a driving sensor which detects each position of each phase of the 2-phase SRM, and generates a driving sensor signal based on the detected result; and a microprocessor which initially drives the 2-phase SRM based on the initializing sensor signal at the time of an initial driving, and normally drives the 2-phase SRM based on the driving sensor signal at the time of a normal driving. | 2010-06-24 |
20100156338 | SYSTEM AND METHOD FOR MONITORING AND CONTROLLING STATOR WINDING TEMPERATURE IN A DE-ENERGIZED AC MOTOR - A system and method for measuring and controlling stator winding temperature in an AC motor while idling is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of a multi-phase AC motor. The circuit further includes a plurality of switching devices to control current flow and terminal voltages in the multi-phase AC motor and a controller connected to the circuit. The controller is configured to activate the plurality of switching devices to create a DC signal in an output of the motor control device corresponding to an input to the multi-phase AC motor, determine or estimate a stator winding resistance of the multi-phase AC motor based on the DC signal, and estimate a stator temperature from the stator winding resistance. Temperature can then be controlled and regulated by DC injection into the stator windings. | 2010-06-24 |
20100156339 | Portable solar battery charger - A portable solar powered battery charger made of multiple panels which can be deployed in a variety of configurations, depending on the amount and shape of the space available. If less than the total number of panels is deployed to gather solar energy, then the electrical configuration is adjusted accordingly with a multiposition switch. The panels include a set of telescoping legs, which can be extended to keep the charger positioned in a window. The panels of the charger can be rotated apart to be deployed on a curved surface such as an umbrella or a tent. | 2010-06-24 |
20100156340 | METHOD AND APPARATUS FOR CHARGING AN ENERGY STORE - The invention relates to a method and an apparatus ( | 2010-06-24 |
20100156341 | Electronic Apparatus and Battery Unit - According to one embodiment, an electronic apparatus includes a main body and a battery unit which supplies power to the main body. The battery unit includes a first battery having a first connecting portion connected to the main body and a second connecting portion provided independent of the first connecting portion, and a second battery connected to the first battery via the second connecting portion. The second connecting portion is configured to be connected to the second battery in two different directions. | 2010-06-24 |
20100156342 | Multi-functional rechargeable charger and power supply with dual direct current outputs - A hand held charger for a plurality of different manufacturers electronic hand devices capable of supplying electrical capacity in devices from the 3.6 to 4.2 volt range and capable of operating on lithium or rechargeable Li-Ion batteries, the charger having a sensing means to determine which type of batteries are presently installed in the charger, the charger having both a mini-USB and 3/32 stereo-mono input and a USB and 3/32 stereo-mono output, as well as incorporating flashlight LED and capacity indicia indicator. | 2010-06-24 |
20100156343 | Wireless Charger System For Battery Pack Solution And Controlling Method Thereof - There is provided a wireless charger system for a battery pack solution that is provided so that a wireless charger system composed of a wireless charger apparatus and a battery pack can supply a power source to a portable terminal block through the wireless power transmission. The wireless charger apparatus | 2010-06-24 |
20100156344 | POWER RECEIVER, AND ELECTRONIC APPARATUS AND NON-CONTACT CHARGER USING SAME - An electronic apparatus ( | 2010-06-24 |
20100156345 | Systems, Apparatus and Devices for Wireless Charging of Electronic Devices - Disclosed are systems, apparatus and devices for wireless charging of electronic devices that include magnets in close proximity to primary and secondary inductive charging coils to move the coils within close proximity and within axial alignment to one another. The system includes a charging apparatus including a first coil having within close proximity a first magnet, the primary coil and magnet together capable of moving within the charging apparatus in accordance with magnetic attraction. A battery charging device includes a secondary coil having within close proximity a second magnet. The magnets can attract so that the coils are moved close together. In this way the respective coils are coupled so that inductive charging may be provided. An engagement structure of the charging apparatus can help to maintain the first coil in a particular orientation within the charging apparatus so that the alignment of the coils is optimized. | 2010-06-24 |
20100156346 | RESONANCE-TYPE NON-CONTACT CHARGING APPARATUS - A resonance type non-contact charging apparatus is disclosed. A charger of the apparatus receives the high frequency power from a secondary side resonance coil of the apparatus. A power ratio detecting section of the apparatus detects the ratio of the reflected power from a primary side resonance coil to the high frequency power source with respect to the output power from the high frequency power source to the primary side resonance coil. A stop control section of the apparatus stops the high frequency power source when the ratio detected by the power ratio detecting section becomes greater than or equal to a predetermined threshold value. | 2010-06-24 |
20100156347 | Wireless charging system and method - A wireless charging system can optimize charging efficiency regardless of a location of a mobile terminal. The wireless charging system wirelessly charges a mobile terminal using electromagnetic induction between a first coil included in a charging pad and a second coil included in the mobile terminal. The charging pad can detect a location of the mobile terminal on the charging pad. The charging pad can move the first coil to correspond to the detected location of the mobile terminal; and supply power to the first coil and charging a battery. | 2010-06-24 |
20100156348 | CHARGER AND CHARGING METHOD - A charger adapted for charging at least one energy storage device to be charged by means of an electrical charging power provided by an electrical power supply grid is provided. The charger includes a grid parameter detector unit adapted for detecting at least one electrical grid parameter of the electrical power supply grid and for outputting a grid parameter detection signal on the basis of the at least one detected electrical grid parameter. A control unit receives the grid parameter detection signal and determines a control signal, wherein a charging power adjustment unit adjusts the electrical charging power on the basis of the control signal. | 2010-06-24 |
20100156349 | SYSTEM AND METHOD FOR PAY AS YOU GO CHARGING FOR ELECTRIC VEHICLES - A vehicle charging station for use in transmitting electrical charging power to a vehicle for use in charging the vehicle is provided. The vehicle charging station includes a controller configured to receive a request for authorization from the vehicle, and transmit a response to the vehicle, wherein the response indicates either an approval or a denial of the request. The vehicle charging station also includes an electricity power meter configured to receive a quantity of electrical charging power and measurement information from the controller, measure the quantity of electrical charging power delivered to the vehicle, and transmit the measurement of the quantity of received electrical charging power to the controller. | 2010-06-24 |
20100156350 | Battery packs - One aspect according to the present invention includes a battery pack and a shock absorbing device interposed between a battery cell holder and a case body and capable of keeping the battery cell holder and the battery cells not to directly contact with an inner surface of the case body. | 2010-06-24 |
20100156351 | DETERIORATION DETECTING METHOD AND DETERIORATION SUPPRESSING METHOD FOR RECHARGEABLE LITHIUM BATTERIES, DETERIORATION DETECTOR, DETERIORATION SUPPRESSOR, BATTERY PACK, AND CHARGER - According to a deterioration detecting method for rechargeable lithium batteries, battery voltages of a rechargeable lithium battery before and after the completion of charging or discharging are measured. An evaluation value is calculated based on the measured battery voltages. This evaluation value is compared with a reference value of the rechargeable lithium battery stored in advance. A deterioration level of the rechargeable lithium battery is estimated based on this comparison result. In addition, further deterioration can be suppressed by controlling charging and discharging of the rechargeable lithium battery based on the estimated deterioration level. | 2010-06-24 |
20100156352 | Controller and Control Method for Charging of the Secondary Battery - A charging/discharging controller ( | 2010-06-24 |
20100156353 | LITHIUM NANOPARTICLE COMPOSITIONS FOR USE IN ELECTROCHEMICAL APPLICATIONS - Nanoscale lithium compositions are disclosed which are suitable for use in electrochemical applications such as electrodes and batteries. The compositions can include nanoparticles having lithium metal and/or lithium alloy cores. A shell material is contemplated comprising lithium nitride or another material that conducts lithium ions. Methods of preparing lithium compositions and methods of preparing electrodes comprising lithium compositions are further disclosed. The crystal structure of the nanoscale lithium compositions is preferably body centered cubic, allowing low volume expansion and high diffusivity of lithium from or into the core structures during discharge and charge processes, respectively. | 2010-06-24 |
20100156354 | 3-PHASE HIGH POWER UPS - A 3-phase uninterruptible power supply (UPS) including first, second, and third AC/DC converters, a DC/DC converter, and at least one DC/AC converter coupled to multiple electrical buses. The first, second, and third AC/DC converters each being configured to receive AC power and to provide multiple DC signals to the multiple electrical buses. The DC/DC converter being configured to convert DC voltages present on the multiple electrical buses to a DC voltage that can be used to charge a battery. The DC/AC converter being configured to receive DC power from the multiple electrical buses and to provide an AC output. The 3-phase UPS being configured such that when suitable AC power is provided to the AC/DC converters, the DC/DC converter is configured to charge a battery, and when suitable AC power is not provided to the AC/DC converters, the DC/DC converter is configured to provide DC power to the multiple electrical buses using power provided by the battery. | 2010-06-24 |
20100156355 | SYSTEM AND METHOD FOR CHARGING A PLUG-IN ELECTRIC VEHICLE - A battery charging system and method for charging a plug-in electric vehicle with power from an external power source, such as a standard 110 volt or 220 volt AC wall outlet. The method senses various internal and external conditions and uses this information to charge the plug-in electric vehicle in an optimum fashion that reduces charging time yet avoids damage to components of the charging system. In one embodiment, the battery charging system includes an external power source, a battery charger with sensors for monitoring the external power source and the charger, a battery unit with sensors for monitoring the battery, a battery charging control module for processing the information, and a user interface that allows user-specified custom charging constraints. All of these components, with the exception of external power source, may be located on the vehicle. | 2010-06-24 |
20100156356 | METHOD OF QUICK CHARGING LITHIUM-BASED SECONDARY BATTERY AND ELECTRONIC DEVICE USING SAME - A charging current is maintained at a predetermined constant quick charging current (S | 2010-06-24 |
20100156357 | System and method for charging rechargeable batteries - The present invention provides for a novel system and method of charging rechargeable batteries of all types, sizes, and voltages, including lithium-ion batteries, through the application of an oscillatory or other time-dependent voltage and/or current prior to, following, and/or simultaneously with the application of a constant voltage and/or current during the charging phase of the rechargeable battery. The novel battery charging method results in a reduction in charging time and an increase in discharge capacity and cell lifetime without adversely affecting the capacity of the battery. | 2010-06-24 |
20100156358 | OSCILLATOR CIRCUIT - An oscillator circuit including a charge/discharge unit, a capacitance amplifier, and a level detection circuit is provided. The charge/discharge unit is used to receive a control signal, and perform a charge or discharge operation on a charge/discharge terminal according to the control signal. The capacitance amplifier, including a first impedance, a second impedance, a voltage follower, and a capacitor, is capable of providing an equivalent capacitance with amplifying characteristics. An input terminal of the level detection circuit is electrically connected to the charge/discharge terminal of the charge/discharge unit, and the level detection circuit generates the control signal to the charge/discharge unit according to the charge/discharge terminal of the charge/discharge unit. The oscillator circuit of the present invention may use a capacitance with a smaller level to provide an equivalent capacitance with amplifying characteristics, and thus achieve an oscillator function. | 2010-06-24 |
20100156359 | SYSTEMS AND METHODS OF CHARGING SUPER-CAPACITORS - Systems and methods for charging a super-capacitor are disclosed. An exemplary method may include outputting a controllable signal, such as a pulse width modulated (PWM) signal, to control a charging circuit. The method may also include determining system voltage. The method may also include reducing a duty cycle of the controllable signal if the system voltage is in regulation, and increasing the duty cycle of the controllable signal if the system voltage is out of regulation to reduce brown-outs during charging of the super-capacitor. | 2010-06-24 |
20100156360 | Eddy current torsional damper for generator - A generator rotor torsional damper system includes a prime mover for generating rotational force, a generator stator, a generator rotor rotatably supported relative to the generator stator and configured to receive a rotational force input from the prime mover, a flywheel rotationally supported relative to the generator rotor by bearings, and an eddy current coupling operably connected between the flywheel and the generator rotor such that rotation of the generator rotor induces rotation of the flywheel in a common rotational direction through engagement by the eddy current coupling. | 2010-06-24 |
20100156361 | System and Method for Transmitting Current Sharing Information among Paralleled Power Trains - An embodiment of the invention relates to a power control device configured to provide current-sharing control in a power converter including a plurality of power trains. The power control device transmits or receives a synchronization signal on a synchronization node to initiate a time frame that includes a plurality of time slots, and to control a switching activity of a power switch in a respective power train. The power control device further includes a current sharing bus node on which a digital current-sharing signal is transmitted in a designated time slot. The power control device determines a load current of the power converter and controls a power train current employing current data received on the current-sharing bus node from another power control device. The power control device may be a master power control device that transmits the synchronization signal on the synchronization node. | 2010-06-24 |
20100156362 | Load transient response time of LDOs with NMOS outputs with a voltage controlled current source - A voltage controlled current source circuit is utilized to clamp the internal compensation node of a low dropout (LDO) regulator with an NMOS output during load transients. The circuit senses a voltage drop of the internal node and mirrors its current to the internal node to hold the internal node voltage when the voltage starts to drop low enough to turn off the output transistor. | 2010-06-24 |
20100156363 | Power system with temperature compensation control - The present invention discloses a power system with temperature compensation control, for selectively supplying power from an external power source or a battery to a load, or charging the battery from the external power source, the power system comprising a buck converter electrically connected between the external power source and the load, and a temperature compensation control circuit for adjusting an output voltage of the buck converter according to a sensed temperature. | 2010-06-24 |
20100156364 | LOW-DROPOUT VOLTAGE REGULATOR AND OPERATING METHOD OF THE SAME - A low-dropout (LDO) voltage regulator that includes an error amplifier which compares a reference voltage with a feedback voltage of an output voltage and outputs an error signal based on the result of the comparison, the error amplifier being biased by an input voltage; a first MOS transistor having a gate electrically connected to the error signal, a source electrically connected to the input voltage and a drain electrically connected to the output voltage; a voltage divider which transmits a predetermined part of the output voltage to the error amplifier as feedback voltage; and a level limiter which limits a level of the output voltage from changing beyond and below an offset voltage when a level of a load current changes. In accordance with embodiments, A predetermined number of comparators and MOS transistor type-switches are provided to enhance the slew ratio of the regulated output voltage and to reduce standby electricity consumption. | 2010-06-24 |
20100156365 | START-UP CIRCUIT AND METHOD FOR HIGH VOLTAGE POWER DISTRIBUTION CIRCUIT - A start-up circuit for a high voltage power distribution circuit includes a transistor, a current source which generates ramped current, an operational amplifier which is connected between the current source and the transistor and controls the transistor, a capacitor which is fed the generated ramped current from the current source and is charged by the generated ramped current, the capacitor being connected to the non-inverting input of the operational amplifier, and a feedback capacitor connected from the transistor output to the non-inverting input of the operational amplifier, which is fed the generated ramped current from the capacitor and is discharged. The transistor is fully enabled when the feedback capacitor is fully discharged. | 2010-06-24 |
20100156366 | STEP-DOWN SWITCHING REGULATOR, CONTROL CIRCUIT THEREOF, AND ELECTRONIC DEVICE USING THE SAME - An output monitoring comparator outputs an ON signal when an output voltage becomes lower than a reference voltage. A pulse modulator generates a pulse signal at a predetermined level, an ON time-period from when the ON signal is outputted. A driver circuit alternately turns ON, after a dead time, a switching transistor and a synchronous rectification transistor, based on the pulse signal. A light load mode detector compares a switching voltage at a connection point of the switching transistor and the synchronous rectification transistor, and ground potential, and at timing at which the ON signal is outputted from the output monitoring comparator, when the switching voltage is higher than the ground potential, nullifies the ON signal. | 2010-06-24 |
20100156367 | CONSTANT VOLTAGE CIRCUIT AND METHOD OF CONTROLLING OUPUT VOLTAGE OF CONSTANT VOLTAGE CIRCUIT - A constant voltage circuit for converting an input voltage input from an input terminal, converting the input voltage to a predetermined constant voltage, and outputting the converted voltage from an output terminal is disclosed that includes an output transistor for outputting a current corresponding to a control signal from the input terminal to the output terminal, a control circuit part for controlling operation of the output transistor so that a proportional voltage proportional to the voltage output from the output terminal is equal to a reference voltage, and a pseudo-load current control circuit part for supplying a pseudo-load current from the output terminal when detecting that the output transistor is switched off according to a voltage difference between the input voltage and a voltage of a gate of the output transistor. | 2010-06-24 |
20100156368 | Power converters with switched capacitor buck/boost - A power converter having a switched capacitor buck/boost operation has first and second switches coupled to a first switching node, third and fourth switches coupled to a second switching node, a capacitor coupled between the first and second switching nodes, and an inductor coupled to the first switching node. A switch controller controls the switches to operate in voltage step-down mode and voltage step-up mode depending on a difference between converter output voltage VOUT and converter input voltage VIN. In a buck-optimized topology operating in a step-down mode, an output current flowing through the first switching node flows through only one switch at a given time. In a boost-optimized topology operating in a step-up mode, an output current flowing through the first switching node flows through only one switch at a given time. As a result, a more compact and efficient power converter may be realized at lower cost. | 2010-06-24 |
20100156369 | HIGH CURRENT VOLTAGE REGULATOR - A linear voltage regulator which includes on its input side an array of switched super capacitors for increasing the overall efficiency between the power source and the load. This apparatus is capable of delivering currents typically from milliamperes to greater than several amperes at very low switching frequencies, hence effectively reducing noise. In addition by using capacitors rather than resistors or transistor devices to drop voltage on the input side, efficiency is enhanced. The array of capacitors is switched by simple analog circuitry or a switching logic with or without a processor subsystem and the capacitors themselves are of the super capacitor type, thus providing very high capacitance, and are effectively series connected during certain phases of operation with the input terminal of the conventional linear voltage regulator portion of the apparatus. Energy stored in the super capacitors during the various phases of operation is reused to improve efficiency. | 2010-06-24 |
20100156370 | Switching regulator and method for eliminating beat oscillation - The present invention discloses a switching regulator eliminating beat oscillation, comprising: a first transistor, a second transistor, and an inductor connected to a common node, wherein the first and second transistors operate to convert an input voltage to an output voltage; a comparator comparing a voltage signal with a saw tooth wave to generate a control signal controlling at least one of the first and second transistors; a feedback loop obtaining a feedback signal from the output voltage and generating the voltage signal according to the feedback signal; and an inductorless filter circuit located in the feedback loop for filtering a predetermined frequency band. | 2010-06-24 |
20100156371 | SINGLE SUPPLY PASS GATE LEVEL CONVERTER FOR MULTIPLE SUPPLY VOLTAGE SYSTEM - The present invention relates to a level converter used in a multiple supply voltage system that is required to design a low-power and high-performance semiconductor, and more particularly, to a single supply pass gate level converter (SPLC) for a multiple supply voltage system, which has low power consumption, operates at high speed, and uses only a single supply voltage. The SPLC includes an input data providing circuit unit which receives an input signal of a low supply voltage; a data inversion circuit unit which receives input data from the input data providing circuit unit and outputs inversed input data; a feedback circuit unit which is fed back by an output of the data inversion circuit unit; and a data output buffer which inverses an output of the data inversion circuit unit and outputs an inversed signal. The input data providing circuit unit, the data inversion circuit unit, the feedback circuit unit, and the data output buffer are all driven by a high supply voltage such that only a single supply voltage which is the high supply voltage is required. | 2010-06-24 |
20100156372 | SWITCHING CONTROL CIRCUIT - A switching control circuit includes an N-channel MOSFET having an input electrode applied with an input voltage and an output electrode connected to one end of an inductor and one end of a rectifying element. The other end of the inductor is connected to a first capacitor. A bootstrap circuit is configured to generate a bootstrap voltage on a second capacitor having one end connected to the output electrode of the N-channel MOSFET. The bootstrap voltage is required when the N-channel MOSFET is turned on. A driving circuit is configured to be applied with a driving voltage corresponding to the bootstrap voltage and turn on/off the N-channel MOSFET to generate an output voltage of a target level on the first capacitor. A clamping circuit is configured to clamp the driving voltage to be at a predetermined level or lower. | 2010-06-24 |
20100156373 | Voltage regulator - Provided is a voltage regulator capable of performing a stable circuit operation while improving undershoot characteristics thereof. When an undershoot has occurred in an output voltage (VOUT), an undershoot improvement circuit ( | 2010-06-24 |
20100156374 | Power Converter with Power Switch Operable in Controlled Current Mode - A power converter and method of controlling a power switch therein to improve power conversion efficiency at low output current. In one embodiment, the power converter includes a first power switch coupled to a source of electrical power and a second power switch coupled to the first power switch and to an output terminal of the power converter. The power converter also includes a controller configured to alternately enable conduction of the first and the second power switches with a duty cycle in response to an output characteristic of the power converter. The controller is configured to control a level of current in the first power switch when the second power switch is substantially disabled to conduct. | 2010-06-24 |
20100156375 | CONTROL DEVICE FOR A SWITCHING CONVERTER - A control device for a switching converter, the converter having at least one transistor supplied by an input voltage and adapted to supply a load by means of an output voltage. The converter also including a circuit adapted to turn on and off the at least one transistor. The control device includes an operation circuit adapted to change the state of the at least one transistor from turned on to turned off or vice versa, respectively when the output voltage goes down or goes up by a first voltage of a given value by defining a first state; the operation circuit including a further circuit adapted to generate a ramp signal and to change the first state of the at least one transistor from turned on to turned off or vice versa when the ramp voltage is equal to the output voltage of the converter. | 2010-06-24 |
20100156376 | Control circuit and method for a digital synchronous switching converter - In addition to an output voltage control loop, a dead-time optimization loop is provided for a digital synchronous switching converter to dynamically adjust the dead-time for the power switches of the converter. It is extracted a minimal feedback signal at a steady state while the output voltage remains under a specification, and a maximal efficiency of the digital synchronous switching converter is thus obtained. | 2010-06-24 |
20100156377 | Systems and methods of increasing power measurement accuracy for power factor correction - Systems and methods for increasing power measurement accuracy for power factor correction (PFC) are disclosed. An exemplary method may include providing a PFC circuit for a power supply, the PFC circuit having a bulk capacitor connected to a rectified AC line. The method may also include measuring output load. The method may also include enabling AC wave skipping if the measured output load drops below a threshold value. | 2010-06-24 |
20100156378 | METHOD AND APPARATUS TO CONTROL A POWER SUPPLY FOR HIGH EFFICIENCY - A power supply control circuit is disclosed. In one aspect, a power supply control circuit includes a controller to be coupled to a switch to regulate an output of a power supply in response to a feedback signal and a parameter change signal. A parameter response circuit is coupled to generate the parameter change signal in response to a difference between a first value of a parameter measured before an event and a second value of the parameter measured after the event. The difference between the first value of the parameter and the second value of the parameter is representative of the relative efficiency of the power supply. | 2010-06-24 |
20100156379 | DEVICE FOR MEASURING THE CURRENT FLOWING THROUGH A POWER TRANSISTOR OF A VOLTAGE REGULATOR - A device for measuring the current flowing through a power transistor of a voltage regulator, the voltage regulator having an input voltage and providing a regulated output voltage and the power transistor coupled between the input and output voltages. The measuring device includes a further transistor adapted to mirror a portion of the current flowing through the power transistor, the further transistor and the power transistor have a first non-drivable terminal in common that is coupled to the input voltage. The measuring device also includes a circuit block to connect the second non-drivable terminals of the power and the further transistor and to provide an output current equal to the portion of the current flowing through the first transistor; the measuring device further including a circuit adapted to detect the output current of said circuit block. | 2010-06-24 |
20100156380 | PHASE DETECTING DEVICE, PHASE CONTROL DEVICE INCLUDING THE PHASE DETECTING DEVICE, AND FUSER CONTROL DEVICE INCLUDING THE PHASE CONTROL DEVICE - A phase detecting device includes a power input unit that receives an AC voltage; a phase detector that detects zero-crossing points of the AC voltage, and outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected; and a power switch that selectively cuts off a flow of AC into the power input unit in response to a mode control signal. | 2010-06-24 |
20100156381 | Voltage 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. | 2010-06-24 |
20100156382 | SOFT-START CIRCUIT AND POWER SUPPLY CIRCUIT INCLUDING SAME - A soft-start circuit to generate and output a soft-start voltage having a specified gradient. The soft-start circuit includes a slope voltage generator circuit to generate and output multiple slope voltages having different specified gradients, including a steepest slope voltage whose gradient is steepest among the gradients of the multiple slope voltages and a mildest slope voltage whose gradient is mildest thereamong, at least one voltage conversion circuit to receive the slope voltages and output a voltage whose gradient is milder than the gradient of the steepest slope voltage, and a selection circuit to receive at least one specified reference voltage and the voltage generated by the voltage conversion circuit, compare the voltage by the voltage conversion circuit with the specified reference voltage, and output either the voltage or the specified reference voltage as the soft-start voltage in accordance with a comparison result generated by the selection circuit. | 2010-06-24 |
20100156383 | CURRENT DETECTION CIRCUIT AND VOLTAGE CONVERTER USING THE CURRENT DETECTION CIRCUIT - A first auxiliary switch circuit is connected to one terminal and a first terminal of a main switch circuit and generates a first auxiliary detection current. A second auxiliary switch circuit is connected to the other terminal and a second terminal of the main switch circuit and generates a second auxiliary detection current. A current adjustment detection circuit adjusts the first auxiliary detection current so that the potentials of the other terminal and the first terminal are equal and passes the first auxiliary detection current in a direction of receiving the current from the first auxiliary switch circuit and adjusts the second auxiliary detection current so that the potentials of the one terminal and the second terminal are equal and passes the second auxiliary detection current in a direction of outputting the current to the second auxiliary switch circuit, thereby generating a detection current being proportional to the output current. | 2010-06-24 |
20100156384 | METHODS AND APPARATUS FOR HIGHER-ORDER CORRECTION OF A BANDGAP VOLTAGE REFERENCE - Methods and apparatus for higher-order correction of bandgap voltage references are disclosed. An example bandgap voltage reference circuit disclosed herein comprises a bandgap voltage generation circuit comprising a first resistor, the bandgap voltage generation circuit configured to generate a proportional-to-absolute-temperature current to drive the first resistor to produce a first voltage, the first voltage contributing to an output bandgap voltage, and a first correction circuit electrically coupled to the first resistor and configured to provide a first correction current, the first correction circuit comprising a first nonlinear device configured to generate the first correction current only within a first temperature range, the first correction current decreasing with increasing temperature, the first correction current to drive the first resistor to increase the first voltage only within the first temperature range. | 2010-06-24 |
20100156385 | Multi-Mode Amplifier - An amplifier capable of operating in multiple modes may include (a) first and second voltage inputs and (b) first and second current outputs that have substantially the same amplitude and polarity. Preferably, the inputs and outputs of the amplifier will have high impedances. The amplifier may operate in a first mode—and function as an operational amplifier—when the first and second current outputs are coupled together. The amplifier may operate in a second mode—and function as a type-2 current conveyor—when the second current output is coupled to the second voltage input. The amplifier may additionally include a third current output that has an amplitude that is substantially the same as the amplitudes of the first and second outputs and a polarity that is substantially opposite to the polarities of the first and second outputs. In this configuration the amplifier may function as a four-terminal floating nullor. | 2010-06-24 |
20100156386 | REFERENCE VOLTAGE CIRCUIT - Provided is a reference voltage circuit capable of generating a temperature-independent reference voltage more stably. Each of N-type metal oxide semiconductor (NMOS) transistors ( | 2010-06-24 |
20100156387 | TEMPERATURE INDEPENDENT TYPE REFERENCE CURRENT GENERATING DEVICE - A temperature independent type reference current generating device and methods thereof. A temperature independent type reference current generating device may include a first reference current generator generating a first reference current having a first element decreasing according to a temperature, a second reference current generator generating a second reference current having a second element increasing according to the temperature, and/or mirroring and outputting a second reference current and/or a mirrored second reference current. A temperature independent type reference current generating device may include a first current mirror mirroring a first reference current and/or outputting a mirrored first reference current, and a second current mirror adding a mirrored first reference current and a mirrored second reference current, and/or mirroring a result of an addition to output a mirrored result as an output reference current. | 2010-06-24 |
20100156388 | CASCODE CURRENT MIRROR AND METHOD - Embodiments of a cascode amplifier (CA) include a bottom transistor with a relatively thin gate dielectric and higher ratio of channel length to width and a series coupled top transistor with a relatively thick gate dielectric and a lower ratio of channel length to width. A cascode current mirror (CCM) is formed using a coupled pair of CAs, one forming the reference current (RC) side and the other forming the mirror current side of the CCM. The gates of the bottom transistors are tied together and to the common node between the series coupled bottom and top transistors of the RC side, and the gates of the top transistors are coupled together and to the top drain node of the RC side. The area of the CCM can be substantially shrunk without adverse affect on the matching, noise performance and maximum allowable operating voltage. | 2010-06-24 |
20100156389 | REDUCING THE EFFECT OF BULK LEAKAGE CURRENTS - A current mirroring circuit is provided. The circuit generally comprises a current source; a first drain extended (DE) MOS transistor, a second DE MOS transistor, a current mirror, and differential amplifier. The current source is generally coupled to the current source at its drain, while the current mirror that is coupled to the sources of the first and second DE MOS transistors and to the current source. The differential amplifier generally has a first input that is coupled to the source of the first DE MOS transistor, a second input that is coupled to the source of the second DE MOS transistor, a first output that is coupled to the gate of the second DE MOS transistor, and a second output that is coupled to the gate of the first DE MOS transistor. | 2010-06-24 |
20100156390 | Comparative Signal Strength Detection - A method for signal strength detection begins by comparing a signal strength representation of a signal with a signal strength representation of a reference signal. The method continues by adjusting, when the signal strength representation of the signal compares unfavorably with the signal strength representation of the reference signal, at least one of the signal strength representation of the signal and the signal strength representation of the reference signal until the signal strength representation of the signal compares favorably with the signal strength representation of the reference signal. The method continues by determining signal strength of the signal based on the adjusting of the signal strength representation of the signal and signal strength of the reference signal. | 2010-06-24 |
20100156391 | MEASURING DEVICE - The invention relates to a measuring device comprising a signal unit ( | 2010-06-24 |
20100156392 | FOIL-LEAF ELECTROMETER FOR STATIC FIELD DETECTION WITH TRIGGERED INDICATOR - An apparatus for detecting a static field includes two surfaces of conductive material that are: (i) electrically coupled to each other, and (ii) adjacent to each other. The two surfaces repel each other in the presence of a static field. A rupturable indicator bridging and coupled between the two surfaces ruptures upon repulsion of the two surfaces from each other by at least a predetermined distance. | 2010-06-24 |
20100156393 | CURRENT SENSOR HAVING COIL MOUNTED TO CURRENT CARRYING BUS AND RELATED SYSTEM - A current sensor includes a coil for sensing current in a current carrying bus, and a mount for mounting the coil to the current carrying bus at a distance from the bus. A system including the current sensor includes similar structure. | 2010-06-24 |