Electricity: power supply or regulation systems inventions 03/08

20080074095 - Bi-directional regulator: A regulated power supply apparatus is provided. The apparatus includes an input power converting circuit for generating a rectified voltage signal, an output power converting circuit comprising a plurality of switching elements, the output power converting circuit coupled to receive the rectified voltage signal, an output power storing element coupled... Agent: Haverstock & Owens LLP

20080074093 - System and method for reducing body diode conduction: A circuit for minimizing the effect of a parasitic body diode by combining a power electronics switching circuit with a pinch-off switch and a delay function.... Agent: Klein, O'neill & Singh, LLP

20080074094 - Systems and methods for sensed current-mode feedback in switching regulators: Various systems and methods for implementing feedback in a switching regulator are disclosed. For example, various current feedback circuits are disclosed that include a current feedback node and a sense node. In addition, the current feedback circuits include an operational amplifier with two inputs. One of the inputs is electrically... Agent: Hamilton And Desanctis

20080074096 - Switching regulator, power supply circuit and secondary cell charging circuit including the same: A switching regulator is disclosed that is able to prevent reverse direction current flow without using a dedicated diode even when a PMOS transistor is used as a switching transistor of a step-down switching regulator. A selection circuit is provided to control connection of the substrate gate of the switching... Agent: Cooper & Dunham, LLP

20080067985 - Pwm boost system and start-up method thereof: A PWM (pulse width modulation) boost system includes a boost circuit, a voltage dividing circuit, a comparator, a PWM circuit, a pre-oscillator, and a current limit circuit. A start-up method of the PWM boost system includes (1) providing an error voltage; (2) generating a PWM signal according to the error... Agent: Egbert Law Offices

20080067986 - Regulator circuit: A regulator circuit is provided which has a reference voltage outputting unit, a first operational amplifier, a voltage-dividing unit, and a second operational amplifier. The reference voltage outputting unit is connected to a power source voltage, has a rectifying element, and outputs a first reference voltage. The first reference voltage... Agent: Volentine & Whitt PLLC

20080067990 - Coupled-inductor assembly with partial winding: An embodiment of a coupled-inductor structure includes a core and a conductor. The core includes first and second members, and spaced-apart forms extending between the members, and the conductor is partially wound about one of the forms. Because the conductor is only partially wound about a form of the core,... Agent: Graybeal, Jackson, Haley LLP

20080067989 - Method and circuit for controlling dc-dc converter: A DC-DC converter reducing reversed current in a low load state and increasing output voltage response speed. An error amplification circuit generates an error signal from the output voltage. A pulse signal generation circuit generates a first pulse signal in accordance with the error signal. A comparison circuit generates a... Agent: Arent Fox LLP

20080067988 - Switching regulator: In a switching regulator, an inductor L1 (in FIG. 1) and an output capacitor C1 are connected on the output side of a series circuit consisting of a switching element (MOS transistor P1) and a synchronous rectification element (MOS transistor N1), and an N-channel MOS transistor Q1 is connected between... Agent: Rabin & Berdo, PC

20080067987 - Variable voltage regulating device: The present invention relates to a variable voltage regulating device for modulating output voltage, comprising the implementation means of duty cycle modulation and control signal modulation. The duty cycle modulation mechanism entails the use of pulse signals with different duty cycles to produce different voltage signals in the resistor-capacitor network,... Agent: G. Link Co., Ltd.

20080067991 - Current generating apparatus and feedback-controlled system utilizing the current generating apparatus: The present invention discloses a current generating apparatus for generating an output current. The current generating apparatus includes: a first current mirror; a first bias current generator for providing a first bias current, and the first bias current generator includes: a first current source for providing the first current; and... Agent: North America Intellectual Property Corporation

20080067992 - Regulator with load tracking bias: An electrical circuit that provides accurate, regulated output voltage over a wide range of input voltages, while exhibiting each of three desired characteristics: accuracy across different supply/process/temperature; stability and linearity yielding phase/gain margins; and high (good) power supply rejection ratio (PSRR). The circuit comprises an output node having a load... Agent: Dillon & Yudell LLP

20080067993 - Frequency regulated hysteretic average current mode converter: A switch mode power converter that precisely controls average switching current and operating frequency. The switching control operative in hysteretic average current mode control provides wide bandwidth operation without the need for slope correction. The switching converter ripple current is varied by a frequency comparator in response to a comparison... Agent: Texas Instruments Incorporated

20080067994 - Constant current mode ripple attenuation method in flyback power supply: A modification of a control loop of a primary side sensing power control system that uses a different and unique relationship to accomplish the constant current control while attenuating the affects of a ripple voltage.... Agent: Fenwick & West LLP

20080067995 - System and method of power distribution control of an integrated circuit: A device is disclosed that includes a first pin to supply power to a first power domain of an integrated circuit, a second pin to supply power to a second power domain of the integrated circuit, a switching regulator and a controller. The switching regulator is coupled to the first... Agent: Qualcomm Incorporated

20080067996 - Reference current generator adjustable by a variable current source: A reference current generator for outputting a current proportional to absolute temperature includes a fixed current source transistor, a variable current source transistor and an output transistor which are connected to a drain voltage line. The fixed current source transistor is connected to a source voltage via a series of... Agent: Nixon Peabody, LLP

20080067997 - Power feeding system, electrical apparatus, power feeding apparatus, and computer readable storage medium: A power feeding system includes a power feeding apparatus and a power line communication unit. The power feeding apparatus feeds power from a power line to an external apparatus. The power line communication unit communicates via the power line, which is a communication medium. The power feeding apparatus includes an... Agent: Oliff & Berridge, PLC

20080067998 - Optical pointing device and power supply semiconductor device therefor: An optical pointing device and a power supply semiconductor device therefore are provided. The optical pointing device includes: an optical unit for irradiating light to an object using a light source and receiving light reflected by the object to output an optical image; a motion sensor for receiving the optical... Agent: Cantor Colburn, LLP

20080061748 - Reducing common mode noise of power factor correction converters using general balance concept: Common mode (CM) noise is substantially canceled in a switching power supply circuit such as a boost converter by providing a split inductor and analyzing the switching power supply circuit as a bridge circuit formed of the switch, portions of the split inductor and parasitic capacitances of respective portions of... Agent: Whitham, Curtis & Christofferson & Cook, P.C.

20080061749 - Power supply step-down circuit and semiconductor device: A power supply step-down circuit is adapted to a semiconductor integrated circuit having a first operation mode and a second operation mode having a smaller current consumption than the first operation mode. The power supply step-down circuit includes a first step-down circuit activated only during the first operation mode to... Agent: Arent Fox LLP

20080061750 - Ripple generation in buck regulator using fixed on-time control to enable the use of output capacitor having any esr: A buck switching regulator formed on an integrated circuit and receives an input voltage and provides a switching output voltage on a switch output node using a fixed on-time, minimum off-time feedback control scheme. The buck switching regulator includes a first capacitor and a first resistor formed on the integrated... Agent: Patent Law Group LLP

20080061751 - Selection device and driving system utilizing the same: A selection device for selecting an output state of a switch device is disclosed. The selection device includes a power source, a rectification element, a driving unit, and a control unit. The switch device includes an upper-arm switch and a lower-arm switch. The power source provides a power signal. The... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20080061752 - Programmable constant power foldback: System and methodology for supplying power to a load using a pass device for connecting the load. A current limit circuit prevents current supplied to the load from exceeding a current threshold. A foldback circuit modifies the current threshold in accordance with a prescribed condition. The foldback circuit is configured... Agent: Mcdermott Will & Emery LLP

20080061753 - Power factor correction circuit using step down regulator: A PFC circuit using a step down regulator includes an input port receiving input AC mains voltage, an output port providing an output DC mains voltage, a mains rectifier connected to the input port, a step down circuit connected to the mains rectifier for providing the output DC mains voltage... Agent: Morgan Lewis & Bockius LLP

20080061754 - Switching power supply unit and control method of switching power supply unit: Decrease in a voltage supplied to a load caused by load fluctuations is minimized. A pulse frequency modulated signal generating unit 13 outputs a signal PFMOUT having a pulse frequency modulated according to a voltage supplied to the load 20. A pulse width modulated signal generating unit 14 outputs a... Agent: Foley And Lardner LLP Suite 500

20080061755 - Synchronous rectification switching regulator and switching method: A synchronous rectification switching regulator includes a reverse current prevention circuit unit that detects a symptom of a reverse current flowing in a direction from an output terminal to a second switching element or a generation of the reverse current based on a voltage of a connecting portion for connecting... Agent: Dickstein Shapiro LLP

20080061756 - Switching power supply device and semiconductor integrated circuit: A capacitor is disposed between the output side and the ground potential of an inductor which creates an output voltage. A first switch element supplies a current from an input voltage to an input side of the inductor, and a second switch element which is turned on when the first... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20080061757 - Output load adaptable mosfet gate drive voltage level in a dc-dc controller: The output current of a fixed-frequency DC to DC converter is sensed, creating a voltage representative of the load current. This voltage is then compared to one or more threshold voltages using a plurality of comparators, creating a plurality of logic signals indicative of which of a plurality of ranges... Agent: Texas Instruments Incorporated

20080061758 - Switching regulator, control circuit of switching regulator, and method of controlling operation of switching regulator: A switching regulator is disclosed that includes a switching transistor; an inductor; a voltage comparator circuit part comparing a voltage at the connection of the switching transistor and the inductor and a predetermined voltage and outputting a first signal; a phase comparator circuit part comparing the phases of a control... Agent: Cooper & Dunham, LLP

20080061759 - Power supply topologies with pwm frequency control: A power supply topology with pulse width modulation frequency control allows the use of an inductor with higher inductance in a converter. By controlling the switching frequency of the pulse width modulation signal, the inductor can achieve high efficiency during a light load condition and is also suitable for a... Agent: Murabito, Hao & Barnes, LLP

20080061760 - Band gap reference circuit and temperature information output apparatus using the same: A BGR circuit includes a temperature-proportional current generating part configured to generate a current in proportion to a change in temperature through a plurality of current paths; a temperature-inverse proportional current generating part generates a current in inverse proportion to a change in temperature through a plurality of current paths.... Agent: Venable LLP

20080061761 - Temperature sensing circuit: A temperature sensing circuit includes first, second and third proportional to absolute temperature (PTAT) units, and first and second subtracters. The first PTAT unit generates a first output voltage based on a reference current and a current of N times the reference current, where N is an emitter current density... Agent: Volentine & Whitt PLLC

20080054861 - Dual path linear voltage regulator: A voltage regulator comprising two feedback loops for regulating a load voltage, where the first feedback loop comprises a pass transistor to source current to the load, and the second feedback loop comprises a shunt transistor to shunt current from the pass transistor to ground. The use of two feedback... Agent: Seth Kalson C/o Intellevate, LLC

20080054860 - Hybrid linear switching voltage regulator: A method, apparatus, and system are described in which a hybrid of two standard types of voltage regulators is formed. The hybrid voltage regulator may share a switching waveform with a switching waveform generator already in use on the circuit board, which may be a switching voltage regulator. This switching... Agent: Blakely Sokoloff Taylor & Zafman

20080054862 - Electronic device: An electronic device includes: a DC power source which supplies a first DC supply voltage; a DC voltage converter which is enabled or disabled in response to a first control signal, and which converts the first DC supply voltage into a second DC supply voltage different from the first DC... Agent: Greer, Burns & Crain

20080054863 - Power supply system with remote control circuit and power supply system operation method: A power supply system with a remote control circuit and a power supply system operation method are provided. The power supply system uses a remote control power supply device and a battery to provide a system with power, while the remote control circuit includes a first-resistor, a first-operational amplifier, a... Agent: Jianq Chyun Intellectual Property Office

20080054864 - Voltage regulator or non-volatile memories implemented with low-voltage transistors: A voltage regulator integrated in a chip of semiconductor material is provided. The regulator has a first input terminal for receiving a first voltage and an output terminal for providing a regulated voltage being obtained from the first voltage, the regulator including: a differential amplifier for receiving a comparison voltage... Agent: Stmicroelectronics Inc. C/o Wolf, Greenfield & Sacks, P.C.

20080054865 - Transient voltage compensation apparatus and power supply using the same: A transient voltage compensation apparatus and a power supply using the same are provided. The power supply mainly uses an energy transferring circuit coupled between an input terminal and an output terminal of a power converter. When a load of the power supply is switched in a very short time,... Agent: Jianq Chyun Intellectual Property Office

20080054866 - Single wire synchronization circuitry for power converters: Synchronization circuitry and synchronization system for synchronizing a plurality of convert/controllers that is electrically-coupled to a common synchronization node are disclosed. The synchronization system includes the synchronization circuitry, oscillation circuitry, and a leading edge detector and pulse generator. The synchronization circuitry includes pull-up circuitry and pull-down circuitry for generating a... Agent: Texas Instruments Incorporated

20080054867 - Low dropout voltage regulator with switching output current boost circuit: A low dropout voltage regulator with switching output current boost circuit. In one aspect of the invention, a voltage regulator circuit includes a low dropout voltage regulator providing an output voltage at an output based on an input voltage at an input, and a boost circuit connected to the low... Agent: Sawyer Law Group LLP

20080054868 - Pseudo average current mode control scheme for switching power converters: A Pseudo Average Output Current Control scheme is provided. The control scheme allows only detecting one part of the inductor current of the switching converter to control the average output current of the switching converter follow the reference current. The control scheme is noise insensitive and makes the whole controlled... Agent: Qi Cui Wei

20080054869 - Switching mode power supply and method for determining a compensation factor thereof: A switching mode power supply is configured to have two modes, a normal mode and a measure mode. To determine a compensation factor to compensate the switching mode power supply in the normal mode, the switching mode power supply is switched to the measure mode to measure a frequency response... Agent: Rosenberg, Klein & Lee

20080054870 - Power supply system and power supply system control method: A power accumulating unit of a power supply system includes a first switch section configured to achieve a first voltage output state in which an output voltage is substantially equal to a first motor driving voltage and a second switch section configured to achieve a second voltage output state in... Agent: GlobalIPCounselors, LLP

20080054871 - Temperature compensating circuit: Provided is a temperature compensating circuit, which conducts a temperature correction having a continuous characteristic, and is small in the circuit scale. An output voltage VOUT at a connection point 14 is determined on the basis of a current Ia2, a current Ib2, and a current Ic2, and an output... Agent: Brinks Hofer Gilson & Lione

20080054872 - Integrated circuit device: An integrated circuit device includes: an internal circuit disposed on an inside area of the integrated circuit device; and at least one regulator circuit that generates a regulation voltage formed by stepping down a power supply voltage provided from outside, wherein an output terminal of the regulator circuit is connected... Agent: Harness, Dickey & Pierce, P.L.C

20080054873 - Power supply device and operations control method thereof: In a disclosed power supply device, a LDO and a switching regulator are connected in parallel with each other. The power supply device selects and actuates either of the LDO or the switching regulator in accordance with a switching signal from the outside. When making the switch from the LDO... Agent: Cooper & Dunham, LLP

20080054874 - Power converter employing regulators with a coupled inductor: A power converter includes a power train with a coupled inductor and a plurality of regulators, and method of forming and operating the same. In one embodiment, the power train includes a coupled inductor including a magnetic core with a common leg, a first leg and a second leg. The... Agent: Slater & Matsil, L.L.P.