Electricity: power supply or regulation systems inventions 03/07

20070069698 - Circuit for multiplexing digital and analog information via single pin of driver for switched mosfets of dc-dc converter: Multiple characteristics of a DC-DC converter, such as its mode of operation (e.g., either forced continuous conduction mode, or discontinuous conduction mode), and an operational parameter (such as the dead-time between switching times of the output switching devices (upper and lower MOSFETs) of the converter, whose associated driver integrated circuit... Agent: Akerman Senterfitt

20070069699 - Dc/dc converter with inductor current sensing capability: A DC/DC converter for converting an input voltage to an output voltage comprises a switch, an inductor, two voltage dividers, a capacitor, and a controller. The switch coupled to the input voltage. The inductor having a parasitic direct current resistance is used for coupling the switch to an output node... Agent: Carlton Fields, Pa

20070069700 - Low-power voltage reference: A circuit provides a voltage reference using very low power. It can also be used as a shut regulator for a quiescent current as low as 1.5 μA. It includes a transconductance amplifier, a gain stage, and a power transistor. One embodiment of this invention utilizes a work function difference... Agent: Perkins Coie LLP Patent-sea

20070069701 - Low cost stability improvement for a linear voltage regulator: An information handling system has a printed circuit board power supply using a linear regulator and a very low ESR output capacitor. At least one printed circuit board conductive land having a desired resistance and coupled between the output capacitor and linear regulator output terminal may be used to stabilize... Agent: Baker Botts, LLP

20070069702 - Apparatus for regulating output voltages: An apparatus for regulating output voltages is used to regulate and output DC voltages, and can output a plurality of DC voltages through a simple structure. The apparatus for regulating output voltages can handle the current mode, and has the function of overcharge protection. The apparatus for regulating output voltages... Agent: Rosenberg, Klein & Lee

20070069705 - Circuits and methods for providing multiple phase switching regulators which employ the input capacitor voltage signal for current sensing: Circuits and methods to correct the load sharing in multiphase switching regulators are provided. Using these systems and methods, the input capacitor voltage signal can be sampled and used for current sensing of the regulator's stages. Differences in the amount of output current for a converter stage can then be... Agent: Fish & NeaveIPGroup Ropes & Gray LLP

20070069703 - Controller for dc-dc converter and method for controlling dc-dc converter: A DC-DC converter that suppresses increase in area and obtains high conversion efficiency irrespective of the output current. A controller controls a first output transistor and a second output transistor in a PWM operation mode or a linear operation mode based on output voltage of the DC-DC converter. The controller... Agent: Arent Fox PLLC

20070069704 - Multiphase dc chopper and method for operating a multiphase dc chopper: A multiphase DC chopper converts an input voltage of an input capacitor into an output voltage of an output capacitor. The multiphase DC chopper has a plurality N of DC choppers connected in parallel between the input capacitor and the output capacitor in which case the nth DC chopper, with... Agent: Lerner Greenberg Stemer LLP

20070069706 - Digital double-loop output voltage regulation: A switched mode voltage regulator has a digital control system that includes dual digital control loops. The voltage regulator comprises at least one power switch adapted to convey power between respective input and output terminals of the voltage regulator and a digital controller adapted to control operation of the power... Agent: Brian M. Berliner O'melveny & Myers LLP

20070069707 - Method and apparatus for switching regulator capable of quick feedback from load: This patent specification describes a power adapter which includes a first amplifier configured to amplify a voltage difference between a voltage proportional to an output voltage of a switching regulator and a first reference voltage, a current detector configured to detect a current proportional to an output current of the... Agent: Cooper & Dunham, LLP

20070069708 - Differential mode inductor with a center tap: A differential mode inductor includes a first inductor lead that receives a current. A first arm receives the current from the first inductor lead. A center tap receives the current from the first arm. A second arm receives the current from the center tap. The second arm is substantially parallel... Agent: Baker Botts LLP

20070069709 - Band gap reference voltage generator for low power: A band gap reference voltage generation circuit includes an operational amplifier for receiving first and second voltages and outputting an operational amplified signal; a first voltage generator for generating the first voltage in response to the operational amplified signal; a second voltage generator for generating the second voltage in response... Agent: Blakely Sokoloff Taylor & Zafman

20070069710 - Voltage generator: A voltage generator includes a bias signal generator generating first to fourth bias signals using a reference voltage, the first to fourth bias signals having different voltage levels. A driving signal generator receives the first and third bias signals to generate a pull-up signal in response to a voltage level... Agent: Mcdermott Will & Emery LLP

20070069711 - Diode stack high voltage regulator: v

20070069712 - Driving circuit and electronic device using the same: A driving circuit is disclosed that has low power consumption and supplies a current to a load. The driving circuit includes a constant current circuit section to generate and output a predetermined constant current, a current mirror circuit section to generate a current proportional to an input current supplied from... Agent: Cooper & Dunham, LLP

20070063678 - Semiconductor device: According to this invention, there is provided a semiconductor device having conversion units which change the reference potential of an input signal to a first or second reference potential and outputs the input signal to a first drive unit or second drive unit, change the reference potential of a first... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070063679 - Multi-phase buck converter: A multi-phase buck converter comprising a first switch set, a second switch set, a capacitor, a first power storing and coupling unit, and a second power storing and coupling unit is provided. The first and the second switch sets are for providing an input voltage and a low voltage. One... Agent: Rabin & Berdo, PC

20070063680 - Power controller: A power controller (10) includes a controller (11) and a trigger circuit (12). When the voltage of a power supply received at terminals T1 exceeds a threshold, for example 120 V RMS, reverse-connected Zener diodes Z1 to Z3 conduct and switch on a transistor Q1. This results in a transistor... Agent: Philips Electronics North America Corporation Intellectual Property & Standards

20070063681 - Direct mode pulse width modulation for dc to dc converters: A DC to DC converter has an inverter, an inductor, a voltage sensor, a comparator, a clock generator, a driver and an output capacitor. The inverter converts an input voltage into a square-wave voltage. The inductor is electrically connected to an output of the inverter. The voltage sensor is electrically... Agent: Birch Stewart Kolasch & Birch

20070063682 - Switched mode power converter: A voltage converter having a controller capable of maintaining stable operation of a voltage converter over multiple modes of operation. The voltage converter provides a feedback signal to an error signal generator. One or more controllers, which are selectively established as part of the feedback loop, process the error signal... Agent: Weide & Miller, Ltd.

20070063683 - Process and device for recharging portable electronic devices: The recharging device for portable electronic devices includes at least one protective case for a portable electronic device in the process of being recharged, at least one electrical power supply for a battery of a portable electronic device in the case, a case management device capable of controlling on the... Agent: John S. Egbert Egbert Law Offices

20070063684 - Device for the correction of the power factor in forced switching power supplies: A device corrects the power factor in forced switching power supplies and includes a converter and a control device to obtain a regulated voltage on an output terminal. The control device comprises an error amplifier having an inverting terminal (Vout) and a non-inverting terminal receiving a reference voltage. The device... Agent: Seed Intellectual Property Law Group PLLC

20070063685 - Dc-dc converter: A DC-DC converter for converting an input DC voltage to an output DC voltage has a switch element which is turned ON/OFF by a drive signal, a reference voltage source for outputting a first reference voltage when the switch element is ON or outputting a second reference voltage when the... Agent: Mcdermott Will & Emery LLP

20070063686 - Series regulator and differential amplifier circuit thereof: A series regulator for supplying a stable output voltage to a load has a differential amplifier circuit and an output stage. The output stage has an output control transistor that supplies the output voltage in accordance with a control signal, and a voltage divider circuit that divides the output voltage... Agent: Rossi, Kimms & Mcdowell LLP.

20070063687 - Circuit and method for bias voltage generation: A bias voltage generation circuit is provided which includes a voltage-to-current translation circuit configured to generate a first current that is positively related to a first voltage. A current mirror circuit is configured to generate a first bias voltage that is negatively related to the first current. The current mirror... Agent: Hewlett Packard Company

20070057649 - Soft-start apparatus for power supplies: A soft-start apparatus for a power supply outputs a compensation signal to a PWM controller as the power supply starts up. Meanwhile, a pulse width of a switching signal outputted from the PWM controller gradually increases from an initial value to a determined value. The pulse width of the switching... Agent: Rosenberg, Klein & Lee

20070057650 - 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 Io increases. This configuration offers... Agent: Arent Fox PLLC

20070057652 - Apparatus and method for monitoring tap positions of load tap changer: A load tap changer (LTC) having a plurality of windings is coupled to one of the primary and secondary windings of a power transformer in order to regulate the output voltage of the power transformer. The LTC includes a plurality of taps physically and electrically connected to the LTC windings... Agent: Henry I. Schanzer, Esq.

20070057651 - Sensing load tap changer (ltc) conditions: A load tap changer (LTC) having a plurality of windings is coupled to one of the primary and secondary of a power transformer in order to regulate the output voltage of the transformer. The LTC includes a plurality of taps physically and electrically connected to and along the windings and... Agent: Henry I. Schanzer

20070057653 - Fan speed controlling circuit: A fan speed controlling circuit includes a temperature sensing circuit for transforming a temperature signal to a voltage signal, a reference voltage providing circuit for outputting a reference voltage, and a voltage amplifying and comparing circuit. The voltage amplifying and comparing circuit includes a negative terminal receiving the voltage signal... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang Jeffrey T. Knapp

20070057654 - Switching regulator with over-current protection: A switching regulator with over-current protection is disclosed. The invention comprises an error amplifier, a pulse width modulator, an over-current protection unit, a gate driver, a tank circuit and a load. According to the invention, the variation of the output current outside a chip is detected and controlled by monitoring... Agent: Birch Stewart Kolasch & Birch

20070057657 - Constant voltage control device: A first output voltage Vcc is obtained via a first switching element from an external power supply, and a second output voltage Vme via a second switching element cascade-connected to the first switching element. The first switching element has a base current continuously controlled by a first comparator/amplifier to maintain... Agent: Sughrue Mion, PLLC

20070057658 - Controller and control method for dc-dc converter: A DC-DC converter having conversion efficiency that is not lowered by input voltage change. A mode control circuit of the DC-DC converter monitors the input voltage, output voltage generated from the input voltage, and output current. The output current changes in accordance with the output voltage. Based on the input... Agent: Arent Fox PLLC

20070057656 - Method and apparatus to improve regulation of a power supply: Techniques are disclosed to regulate a power supply with a compensation signal generation circuit. One example regulated power supply includes a sense circuit coupled to sense an output voltage of the regulated power supply. The regulated power supply also includes a switching power converter circuit, which includes a switch coupled... Agent: Blakely Sokoloff Taylor & Zafman

20070057659 - Power supply apparatus, method of controlling the apparatus, and electronic device using the apparatus: A power supply apparatus includes an input terminal to be connected to a DC power supply, a DC-DC converter connected to the input terminal, a first capacitor, a second capacitor, an output terminal, a first switch connected between an output port of the DC-DC converter to charge the first capacitor,... Agent: Wenderoth, Lind & Ponack L.L.P.

20070057655 - 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

20070057660 - Low-dropout voltage regulator: The invention proposes a low dropout voltage regulator, including a feedback circuit, an operational amplifier, a transconductor, a current mirror, and a power transistor. The feedback circuit provides a voltage according to a current provided by the power transistor. An invert-phase input terminal of the operational amplifier is coupled with... Agent: J.c. Patents, Inc.

20070052394 - Power control of an induction machine: Regulation of the active and reactive power output or received by a induction machine (1) in a coordinate system fixed on the winding, wherein a first regulator output variable is generated using a first regulator (46-1) as a function of a setpoint variable deviation of the active power and a... Agent: Rankin, Hill, Porter & Clark LLP

20070052395 - Peak charging current modulation for burst mode conversion: During burst mode operation of a four switch buck-boost converter, the input voltage and an output voltage can be detected and a preset peak charging current threshold level can be modulated when the difference between the input voltage and output voltage is within a prescribed range. A burst mode charging... Agent: Mcdermott Will & Emery LLP

20070052397 - Method and apparatus for electronic power control: The method of the invention in one aspect involves electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency. An electrical circuit apparatus for accomplishing this function in a specific embodiment... Agent: Kirkpatrick & Lockhart Preston Gates Ellis LLP

20070052396 - Voltage regulator with shunt feedback: A voltage regulator configured to receive a supply voltage from a voltage supply and provide a regulated voltage to digital circuitry is provided. The voltage regulator comprises first circuitry configured to inhibit high frequency energy generated by the digital circuitry from transmitting into the voltage supply, second circuitry configured to... Agent: Dicke, Billig & Czaja, P.l.l.c.

20070052398 - Dc-dc converter and its control method, and switching regulator and its control method: A differential output DC-DC converter capable of decreasing power consumption is presented. The differential output DC-DC converter 1 comprises output terminals VP and VM connected to both ends of load, and a switching regulator 10 for passing a source current. It further comprises a third transistor FET3, a choke coil... Agent: Arent Fox Pllc

20070052399 - Power and information signal transfer using micro-transformers: A power converter provides power across an isolation barrier, such as through the use of coils. A coil driver has transistors connected in a positive feedback configuration and is coupled to a supply voltage in a controlled manner by measuring the output power and opening or closing a switch as... Agent: Iandiorio & Teska Intellectual Property Law Attorneys

20070052400 - Low drop out voltage regulator: A low dropout voltage regulator apparatus is disclosed, which includes a low dropout voltage regulator circuit connected to a supply voltage, wherein at least one input voltage is input to the low dropout voltage regulator circuit to generate at least one output voltage from the low dropout voltage regulator circuit.... Agent: Kris T. Fredrick Honeywell International Inc.

20070052401 - Switch for power factor correction circuits: An improved switch for power factor correction circuits includes a six-terminal switch which has a first inductor connecting to a selection line which has a first switch terminal and a second switch terminal, and a second inductor connecting to a conductive line. When the switch is at a first position,... Agent: Birch Stewart Kolasch & Birch

20070052402 - Current mirror: A current mirror includes at least a first and a second mirror transistors inserted between a first and a second voltage reference and connected to an input terminal and to an output terminal of the current mirror, respectively. The current mirror further includes a base current compensation block inserted between... Agent: Jenkens & Gilchrist, Pc

20070052403 - Analog internal soft-start and clamp circuit for switching regulator: An analog soft-start circuit for a switching regulator (e.g., a buck converter) including an analog ramp circuit and an open-loop analog voltage clamp circuit. The voltage ramp circuit utilizes a two-stage current divider circuit to generate a very low, stable current signal, and an integrator circuit including a relatively small,... Agent: Bever Hoffman & Harms, LLP Tri-valley Office

20070052404 - Current-mode bandgap reference voltage variation compensation: A circuit and method for reducing the variation of a reference voltage as a function of resistivity ρ in a current-mode bandgap reference circuit generating a reference current that is applied to an output resistor to generate the reference voltage. According to the invention, a substantially constant current is generated... Agent: Texas Instruments Incorporated

20070052405 - Reference voltage generating circuit, a semiconductor integrated circuit and a semiconductor integrated circuit apparatus: The present invention provides a band gap type reference voltage generating circuit and a semiconductor integrated circuit having the same, capable of generating a reference voltage of about 1.2V or less whose temperature dependency is low, and realizing reduced offset voltage dependency of a differential amplifier. A band gap part... Agent: Mattingly, Stanger, Malur & Brundidge, P.c.

20070046268 - Dedicated power supply apparatus, terminal. power supply system, and power supply method: A dedicated power supply apparatus includes a regulator that receives power from an external power source, two signal lines to which the regulator is connected, and two resistors, each placed between the regulator and an associated one of the two signal lines.... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070046269 - Device for converting a continuous supply voltage into a continuous output voltage and corresponding electronic circuit: A device for converting a continuous supply voltage into a continuous output voltage includes at least one inductor accumulating energy during an accumulation time and delivering said accumulated energy during a discharge time, so that said output voltage has a value that is greater than or equal to that of... Agent: Westman Champlin & Kelly, P.A.

20070046270 - Dc/dc converter: A DC/DC converter includes a first transformer and a second transformer each having primary windings and secondary windings respectively having first windings and second windings, a second switch connected to both ends of a first series circuit, a fourth switch connected to both ends of a second series circuit, a... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070046271 - Low-power programmable low-drop-out voltage regulator system and methods: A low-power programmable low-drop-out voltage regulator system and methods are presented. The regulator includes a local reference generator circuit that receives a voltage input signal and outputs a reference voltage signal, a buffer circuit that receives the reference voltage signal and outputs an output voltage signal, and a comparison device.... Agent: Sterne, Kessler, Goldstein & Fox PLLC

20070046272 - Non-linear circuit: A non-linear circuit includes a non-linear basic circuit which is provided with an op amplifier, negative feedback circuits thereof, a positive feedback circuit thereof, an input resistor and a second input resistor and transforms an input control voltage into a non-linear basic control voltage; a weighting circuit which includes voltage... Agent: Trexler, Bushnell, Giangiorgi, Blackstone & Marr, Ltd.

20070046273 - Transient behavior while switching between control loops in a switching voltage regulator: A voltage switching regulator includes a pulsewidth modulation (PWM) controller providing voltage regulation when the voltage switching regulator is experiencing being in an high-power mode. A pulse-frequency modulation (PFM) controller provides voltage regulation when the voltage switching regulator is experiencing being in a low-power mode. An error-voltage estimator enables switching... Agent: Gauthier & Connors, LLP

20070046274 - Failure detecting device for a load driving system: A failure detecting device for a load driving system including an upper arm driving means connected between a positive electrode of a direct current power source and one end of a load and a lower arm driving means connected between a negative electrode of the direct current power source and... Agent: Sughrue Mion, PLLC

20070046275 - Switching power supply device and a 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.

20070046276 - Discharge device and dc power supply system: A discharge device and DC power supply system for preventing erroneous operation of a series regulator. The discharge circuit includes a voltage comparison circuit for comparing input power supply voltage and output power supply voltage of the series regulator. The voltage comparison circuit includes first and second transistors. The collector... Agent: Freescale Semiconductor, Inc. Law Department