Electricity: power supply or regulation systems inventions 05/09

20090134850 - Control of power flow in a transmission line: A method for controlling the power flow in an ac transmission line including prompt handling of voltage recovery and only thereafter thermal constraints.... Agent: Venable LLP

20090134851 - Electric power storage system using capacitors and control method thereof: In an electric power storage system according to the present invention, in the case of charging, a plurality of capacitors of each circuit block of the electric power storage system are switched to a serial connection to initiate the charging. When the output voltage of power storage means reaches the... Agent: Cheng Law Group, PLLC

20090134853 - Power supply apparatus: A power supply apparatus that supplies voltage of a battery to a load is disclosed. The power supply apparatus includes a booster circuit connected to the battery and a power storage section, which temporarily stores the power output by the booster circuit. The power storage section is connected in parallel... Agent: Woodcock Washburn LLP

20090134852 - System and method using a current mirror to program an output voltage and current: A programmable AC/DC or DC/DC power supply adapted to compensate for voltage drop in a cable extending to a portable electronic device. The invention reduces the number and size of cable wires and tip components needed to remotely control an output voltage level and an output current limit. The voltage... Agent: Snell & Wilmer L.L.P. (main)

20090134854 - Apparatus and methods for controlling operation of a single-phase voltage regulator in a three-phase power system: Provided are methods for controlling operation of a voltage regulator of a single-phase of a three-phase power system to regulate a measured voltage. One of the methods includes recording a first elapsed time between detecting a first excursion of the measured voltage from an in-band area to an out-of-band area,... Agent: Law Offices Of Eugene M. Cummings, P.C.

20090134855 - Method for controlling a direct current chopper controller: A method of controlling a direct current (“DC”) chopper controller having a switch and a storage choke in which the choke has a current dependent on the switching of the switch on and off includes the following. A current variable derived from one of the time averaged value of the... Agent: Brooks Kushman P.C.

20090134857 - Apparatus and method for adjusting working frequency of voltage regulator down circuit (vrd) by detecting current: The present invention provides an apparatus for adjusting a working frequency of a VRD. The apparatus includes a current detecting circuit, a variable resistance module, and a controller. The current detecting circuit is adapted for determining an output load state of the VRD by detecting a value of a current... Agent: J C Patents, Inc.

20090134856 - Method of optimum current blanking time implementation in current sense circuit: In a method and system for sensing current in a switching regulator (SWR) operating in a current mode, a power switch is coupled to receive the current from a switching element, the power switch being controlled by a gate signal. An inrush of the current causes an initial transient spike... Agent: Texas Instruments Incorporated

20090134860 - Power supply apparatus: In a power supply apparatus that is so configured as to produce from an input voltage an output voltage Vo within a predetermined permissible variation range, the output voltage Vo is so controlled as to decrease within the permissible variation range as the output current lo increases. This configuration offers... Agent: Arent Fox LLP

20090134859 - Switching power supply device: A switching power supply device has lower correction circuit losses, and enables adjustments without affecting overcurrent limiting or other characteristics. An integrated circuit IC for power supply control generates a switching signal based on a feedback signal from a feedback circuit and a voltage signal from a current detection input... Agent: Kanesaka Berner And Partners LLP

20090134858 - Voltage regulating apparatus and method and voltage regulator thereof: A voltage regulating apparatus and method and voltage regulator thereof are presented. The apparatus includes a first regulator and a second regulator. The first regulator is used for receiving an input voltage and outputting a first voltage according to the input voltage. When the input voltage reaches a steady voltage... Agent: Birch Stewart Kolasch & Birch

20090134861 - Power supply circuit and electronic apparatus: A power supply circuit includes: an input terminal; a DC voltage converter that converts a DC input voltage supplied to the input terminal into a DC output voltage; an output terminal that outputs the DC output voltage; a bypass circuit provided to the DC voltage converter between the input terminal... Agent: Staas & Halsey LLP

20090134862 - Transformer operation control apparatus and method for suppressing magnetizing inrush current: A control portion 80 for a breaker 10 causes the breaker 10 to apply a current of a first apply phase (R phase) at a timing where a residual flux of R phase agrees with a steady magnetic flux. Thereafter, the control portion 80 determines whether or not the current... Agent: Buchanan, Ingersoll & Rooney PC

20090128100 - Power system control apparatus and power system control method: A SVC control section detects a bus voltage from an instrument transformer, and adjusts reactive power generated by a SVC according to the detected bus voltage. A cooperative control section generates a control command for controlling the interconnection and parallel-off of a phase lead capacitor and a phase lag reactor... Agent: Buchanan, Ingersoll & Rooney PC

20090128101 - Power conversion circuit: A power conversion circuit comprising an input; an output; an electrical energy storage element having one side connected to the input; and at least two sub-circuits, wherein each respective sub-circuit is connected in series between the output and the other side of said electrical energy storage element; and wherein each... Agent: Studebaker & Brackett PC

20090128102 - Balancing device: A compensator for balancing an ac voltage network with a load connected between two phases. The compensator includes a voltage-source converter and a balancing device. The balancing device includes an inductance connected between phases before the load.... Agent: Venable LLP

20090128103 - Ac high voltage power supply device, charging device, developing device, and image forming apparatus: An AC high voltage power supply device includes a comparison circuit configured to compare a first signal of a sinusoidal waveform and a second signal of a triangular waveform; a switching amplifier circuit configured to perform a switching operation based on a comparison result signal output from the comparison circuit... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090128104 - Fully integrated on-chip low dropout voltage regulator: A low dropout voltage regulator (LDO) includes a bias voltage generator, a differential error amplifier, an output driver, a controlled active load, a Double Ended Cascode Miller compensation block. The bias voltage generator produces a plurality of bias voltages. The differential error amplifier produces a differential output voltage based on... Agent: Hogan & Hartson LLP

20090128105 - Power converter having airplane power source frequency detector: A power converter having an aircraft power source detector configured to limit the amount of power that can be drawn by the power converter when utilized in an aircraft. The power converter may detect an artifact of the aircraft power source, such as the 400 Hz ripple noise on an... Agent: Robert C. Klinger

20090128106 - Power supply controller and semiconductor device: A voltage-dividing circuit 60, which is formed of serially connected voltage-dividing resistors R1, R2, R3, is disposed between the source terminal S of a power MOSFET 15 and the ground. The divided voltage Va at a connecting point A is applied to one of the input terminals of a comparator... Agent: Oliff & Berridge, PLC

20090128107 - Low dropout voltage regulator: Improved designs of an LDO voltage regulator with ultra low quiescent current are disclosed. According to one embodiment, an LDO voltage regulator is designed to completely cancel an intermediate gain stage while decreasing a quiescent current and to stabilize a loop circuit by means of two zeros introduced in a... Agent: Silicon Valley Patent Agency

20090128108 - Constant voltage power supply circuit: A first output transistor forms a first current path between an input and an output terminal and has a first control terminal applied with a first control signal. A second output transistor forms a second current path between the output and a ground terminal and has a second control terminal... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090128110 - Compact frequency compensation circuit and method for a switching regulator using external zero: A compensation circuit in a monolithic switching regulator controller being incorporated in a closed loop feedback system of a switching regulator includes error amplifier having an output terminal with an output impedance and a degeneration resistance terminal coupled to a first terminal of the switching regulator controller. The compensation circuit... Agent: Patent Law Group LLP

20090128109 - Dc/dc converter with dynamic offset compensation: The present invention provides a DC/DC up-converter (100) that is implemented in form of a switching regulator (100). The DC/DC converter (100) makes use of a switching transistor (104) that controls a charging current for a capacitive element (112). Moreover, the DC/DC converter (100) provides control means (106, 140) to... Agent: Nxp, B.v. Nxp Intellectual Property Department

20090128112 - Duty-cycle independent current limit for a power regulator: One embodiment of the invention includes a power regulator system. The system comprises an error amplifier that provides an error voltage based on a comparison of a reference voltage and a feedback voltage associated with an output voltage of the power regulator system. The system also comprises a pulse-width modulation... Agent: Texas Instruments Incorporated

20090128111 - Reverse current protection apparatus for a synchronous switching voltage converter: A synchronous switching voltage converter that avoids a reverse current is provided. The synchronous switching voltage converter comprises a first switch, a second switch, an inductor, a current sensing unit, and a current comparing unit. A first current flows through the inductor. The current sensing unit provides a second current... Agent: North America Intellectual Property Corporation

20090128113 - Power converter having auto conversion function for pulse skip mode and control method: A power converter having an auto conversion function for a pulse skip mode (PSM) and a related control method are provided. The power converter having an auto conversion function for a PSM and a control method thereof can provide a PSM capable of preventing unnecessary switching operations and, thus, improving... Agent: Volentine & Whitt PLLC

20090128114 - Power supply output voltage trimming: A power supply trim control signal is produced by integrating differences between monitored and target values of the output voltage of a power supply. Register storage requirements are reduced by producing the target value from a nominal voltage value and one of a plurality of margin offsets selected in accordance... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090128115 - Voltage regulator and controlling method thereof: A controlling method of a voltage regulator is provided. The voltage regulator at least includes a differential circuit and a pump high-voltage circuit which has a bias path, an output transistor and an output terminal. The controlling method includes steps of: providing at least a pre-charge path to the pump... Agent: Volpe And Koenig, P.C.

20090128116 - Switching regulator: A switching regulator includes a switching element that switches between on and off according to a control signal, an inductor that is charged with the input voltage by switching of the switching element, a rectification element that discharges the inductor when the switching element is off and charging the inductor... Agent: Cooper & Dunham, LLP

20090128117 - Voltage conversion device: A voltage transformer, which is placed between a DC power source (B) and a motor (M1), includes: a voltage sensor (10) and an electric current sensor (11), which senses input and output of electric power to and from the DC power source (B); a buck-boost converter (12) having power control... Agent: Oliff & Berridge, PLC

20090128118 - Power supply voltage control apparatus: A power supply voltage control apparatus capable of freely setting a clock period setting margin according to a system clock frequency, and capable of converging power supply voltage to minimum power supply voltage where normal operation is possible in a short period of time without errors in operation of internal... Agent: Greenblum & Bernstein, P.L.C

20090128119 - Differential output circuit: A differential output circuit comprising: a first power supply line; a constant current source that includes a current input terminal coupled to the first power supply line; an output common mode voltage setting unit that includes a variable resistor element, one end of the variable resistor element being coupled to... Agent: Arent Fox LLP

20090128120 - Reference voltage generation circuit, ad converter, da converter, and image processor: A reference voltage generation circuit includes a plurality of resistors that divide a prescribed input reference voltage into a plurality of divisional voltages and a plurality of analogue switches one of which selects one of the divisional voltages to output the selected divisional voltage as a desired reference voltage. Each... Agent: Harness, Dickey & Pierce, P.L.C

20090128121 - Bi-directional power supply with isolated output: The present invention pertains to a capacitor isolated electronic power converter having a direct current power source in series with a first inductor; and a first switch for switching contact with a second inductor in series with the power source return; an output load in series with a third inductor... Agent: HowardIPLaw Group

20090121690 - Voltage regulator: Provided is a voltage regulator that is excellent in transient response characteristics even if a resistance of a resistor in a phase compensation circuit is large. In the voltage regulator, the resistor of the phase compensation circuit is so configured as to change the resistance thereof according to a voltage... Agent: Bruce L. Adams, Esq Adams & Wilks

20090121691 - Voltage supply device and nonvolatile memory device having the same: A voltage supply device comprises: a charge pump configured to boost a power voltage and to supply the boosted power voltage to a output line; and a voltage control circuit configured to maintain a voltage level of the output line at a target voltage level; wherein the voltage control circuit... Agent: Mills & Onello LLP

20090121692 - Vibration-reduction fan driving circuit: Avibration-reduction an driving circuit is applicable to a fan that operates according to a current signal sent thereto, and is characterized in a current buffer unit connected to a drive current supplied from a power source and having a relatively large magnitude of change in current. The current buffer unit... Agent: Nikolai & Mersereau, P.A.

20090121693 - Constant voltage circuit: A voltage change detecting circuit part amplifies an output signal of a differential amplifying circuit so that a slew rate thereof may be larger than that of a control signal output from a first error amplifying circuit to an output transistor, responding to change of an output voltage output from... Agent: Dickstein Shapiro LLP

20090121694 - Non-invasive load current sensing in low dropout (ldo) regulators: A low dropout (LDO) voltage regulator includes an output terminal for providing a regulated voltage output to a load, and a plurality of PFETs connected in parallel. Each PFET drains a level of current and the sum of the levels of current are provided as a current output at the... Agent: Ratnerprestia

20090121695 - Methods and apparatus for a multiphase power regulator: Methods and apparatus for a multiphase power regulator according various aspects of the present invention operate in conjunction with an active transient response (ATR) system for applying a correction signal to a multiphase pulse width modulator. In the event of a transient, the ATR system may adjust the output of... Agent: The Noblitt Group, PLLC

20090121696 - Controller of dc-dc converter and controlling method thereof: A PWM controller of a DC-DC converter is provided. The DC-DC converter converts an input voltage into an output voltage and comprises an output inductor coupled between an output of the DC-DC converter and a phase node. A first sense circuit senses a signal from the phase node to generate... Agent: Wang Law Firm, Inc.

20090121697 - Circuit and method for reducing output noise of regulator: A circuit and a method for reducing output noise when a pulse width modulation mode is started. A pulse width modulation circuit generates a first pulse signal having a duty cycle that is in accordance with an output voltage of a regulator circuit. A drive circuit generates the output voltage... Agent: Freescale Semiconductor, Inc. Law Department

20090121701 - Bandgap reference generating circuit: A bandgap reference generating circuit includes an operational amplifier configured to generate a bandgap reference voltage; and a gain controller configured to control a gain of the operational amplifier with different values in a normal mode and a low power mode.... Agent: Mannava & Kang, P.C.

20090121699 - Bandgap reference voltage generation circuit in semiconductor memory device: Bandgap reference voltage generation circuit in semiconductor memory device includes a first current generator configured to generate a first current proportional to a change of a temperature by using temperature characteristic of a diode-connected MOS transistor, a second current generator configured to generate a second current inversely proportional to the... Agent: Mannava & Kang, P.C.

20090121698 - Bandgap voltage reference circuits and methods for producing bandgap voltages: A bandgap voltage reference circuit includes a first circuit portion and a second circuit portion. The first circuit portion generates a voltage complimentary to absolute temperature (VCTAT). The second circuit portion generates a voltage proportional to absolute temperature (VPTAT) that is added to the VCTAT to produce a bandgap voltage... Agent: Fliesler Meyer LLP

20090121700 - Constant voltage circuit: An inverse temperature characteristic generating circuit decreases an output voltage Vout by a voltage VGS, and supplies the resultant voltage as a voltage VA to a temperature characteristic generating circuit. The temperature characteristic generating circuit includes a differential amplification circuit that receives a terminal voltage VAP between resistances R22 and... Agent: Mcdermott Will & Emery LLP

20090121702 - Methods and apparatus to provide self-tracking pre-driver controls: Methods and apparatus for a self-tracking high-side pre-driver control are described. In an example, a method is described comprising charging a first terminal associated with a first capacitive element to a first voltage with respect to ground and a second terminal associated with a second capacitive element to a second... Agent: Texas Instruments Incorporated

20090115379 - Soft-start circuit for power regulators: One embodiment of the present invention includes a system for providing a soft-start for a power regulator comprising a differential transistor pair that receives an input current and conducts a first current through a first transistor and a second current through a second transistor. One of the first and second... Agent: Texas Instruments Incorporated

20090115380 - Internal voltage generator: An apparatus for generating an internal voltage includes an output-voltage detecting unit for detecting a voltage level of an internal voltage, an oscillating unit for generating a periodic signal in response to a detection signal from the output-voltage level detecting unit, a first driving-voltage level detecting unit for detecting an... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090115381 - Automatic frequency control for series resonant switched mode power supply: A switched mode power supply comprises a half bridge circuit or a full bridge circuit. A resonant circuit is connected to the bridge circuit and comprises an inductive element (105, 208): end a capacitive element (106, 209) connected in series, whereby the resonant circuit has a resonant frequency. The rate... Agent: Philips Intellectual Property & Standards

20090115382 - Linear regulator circuit, linear regulation method and semiconductor device: According to one aspect of the embodiment, a linear regulator circuit includes an output transistor outputting an output current based on a input voltage, an error amplifier outputting a control signal based on an electric potential difference between an output voltage based on the output current and a reference voltage,... Agent: Arent Fox LLP

20090115384 - Distributed power management: Apparatuses, methods, and systems for effective power management distribution are provided. In an embodiment, a system for providing power to a circuit block comprises a power management unit (PMU) configured on a first substrate and an integrated circuit (IC) configured on a second substrate. The PMU includes a first regulator... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20090115383 - System and method for controlling mode crossover time in a power supply: A system for controlling mode crossover time in a power supply includes a power output element having a constant voltage control loop and a constant current control loop, the constant voltage control loop having a first error amplifier and the constant current control loop having a second error amplifier. An... Agent: Agilent Technologies Inc.

20090115388 - Dc/dc converter: A DC/DC converter is constituted of a switching element (e.g., a MOS transistor), an LC low-pass filter constituted of an inductor and a capacitor, and a control circuit for controlling the on/off timing of the switching element such that the output voltage is set to a predetermined voltage value. A... Agent: Pillsbury Winthrop Shaw Pittman LLP

20090115385 - Dual circuit wall switch occupancy sensor and method of operating same: A method and apparatus are provided for detecting occupancy in an area using multiple detection technologies (e.g., ultrasound and infrared sensing) to intelligently control switching of plural load circuits whereby one of the circuits is affected by photocell control. A programmable controller implements auto-on, manual-on, reversion to auto-on and override... Agent: Roylance, Abrams, Berdo & Goodman, L.L.P.

20090115386 - Power supply circuit and portable device: In a power supply circuit, a first switching transistor and a second switching transistor are serially connected between another-side terminal GND and a one-side terminal VCC of an input power supply, and a third switching transistor and a fourth switching transistor are serially connected between the one-side terminal VCC of... Agent: Osha Liang L.L.P.

20090115389 - Pulse width modulation regulator system with automatically switching pulse skipping mode: A pulse width modulation (PWM) Regulator System with automatically switching pulse skipping mode (PSM) is disclosed. The PWM regulator system comprises a PWM regulator, a PSM switching module and a pulse generator. The PWM regulator converts the input voltage by PWM. The PSM switching module determines to enter or exit... Agent: Stout, Uxa, Buyan & Mullins LLP

20090115387 - Voltage generating circuit: A voltage generating circuit comprising: a switching device which includes a first end connected to a high potential side power source, and which becomes conductive in a first mode and becomes non-conductive in a second mode; a first transistor including a first main electrode connected to a second end of... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090115391 - Load-dependent frequency jittering circuit and load-dependent frequency jittering method: The present invention discloses a load-dependent frequency jittering circuit, comprising: a load condition detection circuit for receiving a switching signal and generating an output according to a load condition; a number generator for receiving the output of the load condition detection circuit and generating a number; a digital to analog... Agent: Tung & Associates

20090115390 - Power converter with protection mechanism for diode in open-circuit condition and pulse-width-modulation controller thereof: A power converter with a protection mechanism for a diode in an open-circuit condition includes a DC to Dc (DC/DC) conversion circuit, a detection and protection circuit, a pulse-width-modulation (PWM) signal generator, and a logic gate. The detection and protection circuit is used for detecting an open-circuit condition of the... Agent: North America Intellectual Property Corporation

20090115392 - Switching regulator: A switching regulator includes a step-down-and-step-up unit to convert an input voltage to a low voltage or to a high voltage in accordance with a control signal, and a controller including a low-pass filter to receive a reference voltage generated in accordance with an external control signal. The controller causes... Agent: Cooper & Dunham, LLP

20090115393 - Photovoltaic power generation controller and power evaluation method in photovoltaic power generation control: A photovoltaic power generation controller, in which minute power change is detected even with a low-resolution AD converter, thereby being capable of performing maximum power point tracking control with high accuracy, is provided. In the photovoltaic power generation controller of the invention, a control circuit 44 shifts switches 41 to... Agent: Foley & Lardner LLP

20090115394 - Semiconductor integrated circuit: A semiconductor integrated circuit includes: a main-interconnect to which supply voltage or reference voltage is applied; a plurality of sub-interconnects; a plurality of circuit cells configured to be connected to the plurality of sub-interconnects; a power supply switch cell configured to control, in accordance with an input control signal, connection... Agent: Rader Fishman & Grauer PLLC

20090115395 - Power supply system: A power supply system includes a power supply unit, a conductive wire group and a voltage converter. The conductive wire group consists of a numbers of wires and extends from the power supply unit to electrically connect the voltage converter. The voltage converter can electrically connect at least a working... Agent: Pai Patent & Trademark Law Firm