Electricity: power supply or regulation systems inventions 12/07

20070296380 - Power factor correction control circuit: A bidirectional boost circuit for power factor correction includes a power factor control circuit and a pair of diodes, a pair of inductors, and a pair of switches. A first diode, a second diode, a first inductor, a second inductor, a first switch, and a second switch convert the AC... Agent: Pillsbury Winthrop Shaw Pittman LLP

20070296381 - Method of operating a converter circuit: A method of operating a converter circuit is disclosed, wherein the converter circuit has a converter unit with a multiplicity of controllable power semiconductor switches and the converter unit is connected at the AC voltage end to an electrical AC voltage network. According to the method, the controllable power semiconductor... Agent: Buchanan, Ingersoll & Rooney PC

20070296382 - Dynamic multiphase operation: An output regulator comprises M switch arrays, where M is an integer greater than 2. A controller selectively enables N of the M switch arrays in response to a sense signal. The sense signal is based on an output of the output regulator. The controller generates drive signals to control... Agent: Harness, Dickey & Pierce P.L.C

20070296383 - Non-isolated bus converters with voltage divider topology: A voltage converter having four switches Q1, Q2, Q3, Q4, connected in series and operated in pairs in a complementary fashion. An input voltage is provided across the four switches. A middle capacitor is connected in parallel with two middle switches Q2, Q3. Voltage output is provided across switches Q3... Agent: Whitham, Curtis & Christofferson & Cook, P.C.

20070296385 - Low ripple line-state dependent pwm dcdc converter controllers and methods for slic switching load regulation: Low ripple line-state dependent PWM DCDC converter controllers and methods for subscriber line interface circuit switching load regulation. In accordance with the method, line state is monitored to determine the target voltage for that state, and a DCDC converter is controlled responsive to the line state and the difference between... Agent: Blakely Sokoloff Taylor & Zafman

20070296384 - Method of forming a feedback network and structure therefor: In one embodiment, a feedback network of a voltage regulator is configured to adjust a value of a voltage divider responsively to a control word.... Agent: Bradley J. Botsch Semiconductor Components Industries, LLC

20070296386 - Switching power-supply circuit and semiconductor integrated circuit: A switching power-supply circuit generates a predetermined output voltage by controlling a first switching transistor connected to a power supply and a second switching transistor connected between the first switching transistor and the ground. The switching power supply circuit includes a first driver, a second driver, a soft-start voltage generator... Agent: Cantor Colburn, LLP

20070296387 - Multi-phase dc-dc converter using auxiliary resistor network to feed back multiple single-ended sensed currents to supervisory controller for balanced current-sharing among plural channels: A multi-phase DC-DC converter incorporates auxiliary resistor networks to feed back to the converter's supervisory controller voltages representative of secondary sensed currents associated with primary currents sensed relative to the common nodes of the respective phases, and derived from the output nodes for each phase. The auxiliary resistor network-coupling of... Agent: Akerman Senterfitt

20070296388 - Power supply circuit: A power supply circuit includes a standard voltage generator, a regulator, a capacitor and a discharging circuit. The standard voltage generator is configured to generate a standard voltage. The regulator is configured to control an output voltage by use of a reference voltage based on the standard voltage outputted from... Agent: Cantor Colburn, LLP

20070296389 - Switching regulators: A switching regulator. A pulse width modulation (PWM) unit comprises an output stage and generates a PWM driving signal to control the output stage, such that an inductor delivers an inductor current signal to the load, and a slope compensation unit outputs a slope compensation signal with a compensation slope... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20070296390 - Method and apparatus for regulating voltage: An AC voltage regulator able to provide a desired voltage to any type of a given load within a predetermined range without any output power interruptions during any transition time, without distortion of the AC sine wave and without high current circulating through the circuit components during the voltage switching.... Agent: Greenlee Winner And Sullivan P C

20070296391 - Current-monitoring apparatus: A local area networking apparatus comprises a power stage for connecting to a network cable for carrying carry power and data. The power stage comprises a main current flow path which includes a switch comprising at least one transistor positioned in the main current flow path and a current monitoring... Agent: Workman Nydegger

20070296392 - Bandgap reference circuits: Bandgap reference circuits capable operating in low voltage environments. In the bandgap reference circuit, an operational amplifier comprises an output terminal and first and second input terminals, first and second transistors are coupled to the operational amplifier, and a first resistor is coupled between the output terminal of operational amplifier... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20070296393 - Inductively powered mobile sensor system: The present invention provides an inductively powered sensor system having a primary conductive path capable of being energized to provide an electromagnetic field in a defined space. An inductive power pick-up is associated with a sensor and is capable of receiving power from the field to supply the sensor. The... Agent: Darby & Darby P.C.

20070296394 - System and method of classification in power over ethernet systems: A method is disclosed that includes receiving a classification voltage at a powered device from a network. The classification voltage includes a baseline voltage level that is below an operating voltage range of the powered device and includes a sequence of distinct signal elements derived from the classification voltage. The... Agent: Toler Schaffer, LLP

20070290656 - Zero voltage zero current switching converter: A power converter circuit includes an input switching circuit, an isolation circuit, a rectifier circuit that includes a least a pair of rectifiers, and an output circuit. The input switching circuit receives a first voltage and generates an AC voltage. The isolation circuit has a primary side configured to receive... Agent: Harness, Dickey & Pierce, P.L.C

20070290657 - Circuit and method for regulating voltage: A hybrid regulator circuit and a method for regulating an output voltage. The hybrid regulator circuit includes a switching regulator, a linear regulator, a selector circuit, and an output capacitor which is shared by the switching regulator and the linear regulator. The selector circuit activates the linear regulator to provide... Agent: Bradley J. Botsch Semiconductor Components Industries, LLC

20070290659 - D.c. power supply with high efficiency output control: A preferred method for controlling the current output of a D.C. voltage source over a broad range, according to the present invention, switches the current supplied by the D.C. source “off” and “on” at a controlled frequency as it is passed through an inductor, so that the flow is impedance... Agent: John F. Bryan

20070290658 - Initial voltage establishing circuit for a switching voltage converter: An initial voltage establishing circuit has a current supplying circuit, a current adjusting circuit, a charge/discharge control circuit, and an oscillating signal generating circuit. The current supplying circuit provides a charge current and a discharge current. The current adjusting circuit adjusts the charge current and the discharge current. The charge/discharge... Agent: North America Intellectual Property Corporation

20070290660 - Shunt regulator and electronic apparatus: Controlling the supply voltage with high precision irrespective of variations in threshold. A bypass transistor is connected between power supply terminals and provides a bypass path of an excessive current flowing when the supply voltage increases. A resistor is connected between the source of the bypass transistor and the power... Agent: Arent Fox LLP

20070290661 - Transformer for determining the state of a variable resistive layer in a material stack: A method and an apparatus for detecting a number of variation in resistance within a material stack in response to a scanning and injection of a non-contacting electron stream into a material stack, the material stack having a first conductive contact layer, a variable resistive layer, a fixed resistive layer,... Agent: Marshall, Gerstein & Borun LLP (intel)

20070290662 - Power supply system for computer: A computer system includes a component, a power supply, and a direct current to direct current converter. The power supply provides a first direct current signal to the direct current to direct current converter. The direct current to direct current converter converts the first direct current signal into a second... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang Jeffrey T. Knapp

20070290663 - Power switch device and method for cluster computer: A power switch device and method for a cluster computer is described. A power input circuit receives plural input powers and plural state signals corresponding to the input powers. A first output circuit supplies the input powers to a head node and at least one compute node. A second output... Agent: Rabin & Berdo, PC

20070290664 - Method for inhibiting thermal run-away: A method for method for inhibiting thermal run-away in a multi-phase power converter at varying load transition rates. A multi-phase power converter having an on-time is provided and the frequency of the multi-phase power converter is adjusted so that a load step period and the on time of the multi-phase... Agent: Bradley J. Botsch Semiconductor Components Industries, LLC

20070290665 - Low dropout linear regulator having high power supply rejection and low quiescent current: Methods and apparatus are disclosed for providing stable voltage references from within a low dropout voltage regulator. Some embodiments utilize dependable semiconductor inherent attributes to generate a voltage reference, such as a band-gap voltage reference.... Agent: Perkins Coie LLP Patent-sea

20070290666 - Power supply: A power supply apparatus includes a switching regulator, a linear regulator, a timer circuit, a control circuit, an inverter, and a switch. The power supply apparatus is a step-down type DC-DC converter which steps down an input voltage inputted to an input terminal and then outputs an output voltage, which... Agent: Cantor Colburn, LLP

20070290667 - Step-up/step-down type dc-dc converter, and control circuit and control method of the same: To provide a control circuit and control method of a step-up/step-down type DC-DC converter capable of realizing high efficiency. In a state (1), a terminal Tx of a choke coil L1 is connected to an input terminal Tin, and a terminal Ty is connected to a reference potential. In a... Agent: Arent Fox LLP

20070290668 - Maxium power point tracking method and tracking device thereof for a solar power system: A maximum power point tracking method, applied to a tracking device, employs a DC/DC converter connecting with a solar cell array, and including a controller actuating the DC/DC converter to perform an active resistance characteristic; a maximum power point tracking circuit adjusting the active resistance of the DC/DC converter; monitoring... Agent: Bacon & Thomas, PLLC

20070290669 - Reference voltage generator circuit: A reference voltage generator circuit is provided which is capable of stable generation of a reference voltage. A differential amplifier circuit has a non-inverting input terminal input with the voltage Vbe1 generated by a PNP transistor Q1 and an inverting input terminal input with an output signal thereof. A differential... Agent: Arent Fox LLP

20070290670 - Device for reducing harmonics in three-phase poly-wire power lines: The invention is a harmonics reduction device for three-phase poly-wire power lines, which can more reliably eradiate harmonics current applied to an electric power system via a neutral line. The invention comprises an electric power system having three-phase poly-wire power lines in order to supply alternating-current (AC) power voltage to... Agent: Bacon & Thomas, PLLC

20070285065 - Step-up/step-down (buck/boost) switching regulator control methods: A step-up/step-down switching regulator control method for a regulator having an inductor with first and second leads, a first switch for controllably coupling the first lead to a source of power, a first device between the first lead and a circuit ground, a second switch for controllably coupling the second... Agent: Blakely Sokoloff Taylor & Zafman

20070285066 - Buck topology allowing step-up and polarity change: A buck topology that provides voltage step up and polarity change is disclosed. In one embodiment a converter includes an input for receiving an input voltage, a switching circuit coupled to the input for receiving a first driving signal, a floating voltage source coupled to the switching circuit for producing... Agent: Wagner, Murabito & Hao LLP

20070285067 - Methods and apparatus for electric supply: An electrical system according to various aspects of the present invention includes a supply configured to provide a signal at a desired level. The supply monitors the output signal and compares the output signal to multiple thresholds. If the signal crosses a coarse-adjustment threshold, the supply coarsely adjusts the output... Agent: Quarles & Brady LLP

20070285068 - Method and apparatus for reducing audio noise in a switching regulator: A switching regulator utilizing on/off control that reduces audio noise at light loads by adjusting the current limit of the switching regulator. In one embodiment, a switching regulator includes a state machine that adjusts the current limit of the switching regulator based on a pattern of feedback signal values from... Agent: Blakely Sokoloff Taylor & Zafman

20070285070 - Control circuit to reduce reverse current of synchronous rectifier: The present invention provides a control circuit to avoid a reverse current of a synchronous rectifier. A switching signal is applied to charge an inductor of a power converter. A predication circuit generates a timing signal in response to the switching signal. The timing signal is used to turn off... Agent: Rosenberg, Klein & Lee

20070285069 - Method and apparatus for power savings in a switching regulator: In one embodiment, the present invention includes a regulator having a pulse width modulation (PWM) controller to generate a PWM control signal based on a voltage level of a load coupled to the regulator, a driver to provide a drive signal to a switching element of the regulator responsive to... Agent: Trop Pruner & Hu, PC

20070285071 - Method and related controller capable of sensing a heavy load and a short circuit of low dropout regulators: A method capable of sensing a heavy load and a short circuit of a low dropout regulator includes providing a ramp pulse signal to the low dropout regulator, providing a square waveform, comparing a feedback signal of the low dropout regulator with the square waveform, and determining the low dropout... Agent: North America Intellectual Property Corporation

20070285072 - Multi-output type dc/dc converter: A multi-output type DC/DC converter including: a reactor connected to a direct-current power supply; a first switching circuit to apply a current to the reactor; a second switching to switch an output from the reactor to any one of output terminals; output voltage detection units to detect voltages of the... Agent: Frishauf, Holtz, Goodman & Chick, PC

20070285073 - Switching regulator and voltage control method thereof: A CMC-type switching regulator is disclosed that includes: a switching element switching to control outputting of input voltage; a smoothing circuit outputting the smoothed output voltage of the switching element to an output terminal; a voltage divider dividing the output voltage; an error amplifier amplifying the difference between reference voltage... Agent: Dickstein Shapiro LLP

20070285074 - Dc-dc converter and control for dc-dc converter: A DC-DC converter for converting an input voltage and generating an output voltage. The DC-DC converter includes an adjustment resistor. A control circuit generates a control signal and includes an external terminal to which the adjustment resistor is externally connected. A switching transistor is connected to the control circuit and... Agent: Arent Fox LLP

20070285075 - Method of forming a voltage regulator and structure therefor: In one embodiment, a voltage regulator uses a first current to charge a by-pass capacitor for a first time period and uses a second current after the first time period.... Agent: Bradley J. Botsch Semiconductor Components Industries, LLC

20070285076 - Two pin-based sensing of remote dc supply voltage differential using precision operational amplifier and diffused resistors: A DC power supply control apparatus monitors respective terminals supplying positive and negative DC supply voltages to a utility device. The voltage at the negative terminal is compared with a target value for that voltage to produce an offset current representative of any voltage differential therebetween. This offset current is... Agent: Akerman Senterfitt

20070285077 - Controller for dc-dc converter: A DC-DC converter for preventing through current from causing erroneous operation of an ideal diode. A first transistor for receiving input voltage is connected to an ideal diode, which includes a second transistor and a comparator for detecting current flowing through the second transistor and generating a detection signal. A... Agent: Arent Fox LLP

20070279015 - Integrated power factor correction capacitance unit: An integrated power factor correction unit incorporates presized, preselected components within a housing structure. The integrated unit is intended to be selected and preassembled according to certain known criteria of the anticipated load and applied as a unit. The unit is also designed to mate easily to the load, both... Agent: Barry I. Friedman, Esq. Metz Lewis LLC

20070279016 - System stabilization control system: In a system stabilizing control system of controlling reactive power by a reactive power compensating device according to a voltage variation of an electric power system in which a capacitor is connected to a bus through a breaker, when the bus voltage drops, the capacitor is closed through the breaker... Agent: Buchanan, Ingersoll & Rooney PC

20070279017 - Power supply having power status indicator with reduced power consumption: What is concerned is a power supply having a power status indicator, in which the power status indicator is powered by a constant voltage source, such as a constant voltage provided by an auxiliary power supply or a reference voltage provided for the internal control circuitry. Or otherwise, the power... Agent: Madson & Austin

20070279018 - Power supply device and electric appliance therewith: A power supply device has a DC/DC converter producing an intermediary voltage from an input voltage, a series regulator producing a desired output voltage from the intermediary voltage, an output current monitoring circuit monitoring the output current flowing through the series regulator, and an intermediary voltage adjustment circuit adjusting the... Agent: Fish & Richardson P.C.

20070279019 - Transformer based voltage supply: There is disclosed a voltage summer including a transformer having a primary side and a secondary side, wherein a first voltage to be summed is connected to the primary side and a second voltage to be summed is connected to the secondary side. There is further disclosed a transformer comprising... Agent: Demont & Breyer, LLC

20070279020 - Transcutaneous power supply with optimal positioning for use with active implantable devices: The transcutaneous power supply and/or recharger device of the present invention enables a precise centering of the device with a receiver coil in an implant. In one embodiment, the power supply device includes a plurality of satellite sensors or coils disposed around the transmitter coil. A voltage value detected in... Agent: Themis Intellectual Property Counsel

20070279022 - Power converter and magnetic structure thereof: A power converter includes a power generating unit, a first transformer, a first switching unit, a second switching unit, a first inductor and a power outputting unit. The power generating unit generates a power signal. The first and second switching units are electrically connected to the power generating unit and... Agent: Birch Stewart Kolasch & Birch

20070279021 - Power supply circuit, charge pump circuit, and portable appliance therewith: According to the invention, a charge pump circuit (21) has, as switching means turned on when a capacitor (C1) is charged, transistors (P1 to P3) connected in parallel between one end of the capacitor (C1) and an input terminal (T1). When the capacitor (C1) is charged, a controller (CNT) determines... Agent: Fish & Richardson P.C.

20070279023 - Voltage up-conversion circuit using low voltage transistors: According to one exemplary embodiment, a voltage up-conversion circuit includes a modulated voltage generator circuit, where the modulated voltage generator circuit is configured to receive an input voltage and generate a modulated voltage, and where the modulated voltage generator circuit includes at least one transistor. The voltage up-conversion circuit further... Agent: Farjami & Farjami LLP

20070279024 - Dc/dc voltage regulator with automatic current sensing selectability for linear and swith mode operation utilizing a single voltage reference: A switch-mode DC/DC converter (101) and linear low drop out (LIDO) DC/DC regulator (105) are connected in parallel to drive a single load Both regulators share a common voltage reference, feedback network (103), input supply and output such that the regulated voltage is identical during each mode of operation. During... Agent: Perkins Coie LLP Patent-sea

20070279025 - Current multiplier/divider-configured feed-forward compensation for buck-mode converter controller with programmed switching frequency: A current multiplier/divider-configured, feed-forward compensation circuit for a pulse width modulator (PWM) controller for a buck-mode DC-DC converter is operative to achieve constant loop gain irrespective of the magnitude of the input voltage, obviates the need for parameter calculations/adjustments of circuit components to conform with the PWM frequency selected by... Agent: Akerman Senterfitt

20070279027 - Semiconductor device and system and method of crystal sharing: A system includes a first semiconductor device, a second semiconductor device, and an external crystal oscillator. The first semiconductor device includes a source voltage output and an external pin input. The first semiconductor device includes a direct current-to-direct current (DC-DC) converter circuit that provides the source voltage output. The second... Agent: Toler Schaffer, LLP

20070279026 - Voltage regulator and method thereof: A voltage regulator. A first analog to digital converter generates first data according to a first output voltage. A second analog to digital converter generates second data according to a second output voltage. A voltage adjustment device generates a voltage control signal according to the first data and the second... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20070279028 - Switching regulation device and related method with over-current protection: A switching regulation device includes a switching regulation module and a control module. The switching regulation module generates a first control signal. The control module is coupled to the switching regulation module for receiving the first control signal and performing an over-current protection on the switching regulation module according to... Agent: North America Intellectual Property Corporation

20070279029 - Bandgap circuit with temperature correction: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched current source is coupled to the one transistor to inject or remove a first current into or from the emitter of that transistor. The first current is selected to correct... Agent: Donald J. Lenkszus

20070279030 - Trimmable bandgap circuit: A voltage bandgap circuit comprises a first transistor and a second transistor connected in a voltage bandgap circuit arrangement, the area of the first transistor is selected to be a predetermined multiple of the area of the second transistor; a differential input amplifier has a first input coupled to the... Agent: Donald J Lenkszus

20070279031 - Power supply circuit: The disclosure concerns a power supply circuit comprising a voltage converter receiving an external voltage and outputting an internal voltage; a first switch and a second switch connected between an output of the voltage converter and a constant voltage source; a resistor provided between the first switch and the second... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20070279032 - Circuit calibration using a time constant: According to one general aspect, an apparatus includes a first resistor in a first current path of a resistor-capacitor (RC) circuit, the resistor connected to a power source. A variable capacitor is included in a second current path of the RC circuit and operably connected to the power source and... Agent: Brake Hughes Bellermann LLP

20070279033 - Zero power start-up circuit for self-bias circuit: An improved start-up circuit and method for self-bias circuits is described that applies a start-up voltage and current to a self-bias circuit to initialize its operation in its desired stable state. Once the self-bias circuit converges to its desired state of operation a start-up voltage reference/voltage clamping circuit shuts off... Agent: Attn: Andrew C. Walseth Leffert Jay & Polglaze, P.A.

20070279034 - Digital dc-dc converter using digital modulation: A digital DC-DC converter is implemented using first-order delta-sigma modulation, rather than A/D conversion. In the DC-DC converter, a PWM generator converts an input DC voltage to a preset level DC voltage according to an input PWM signal. A converter converts the DC voltage from the PWM generator to a... Agent: The Webb Law Firm, P.C.

20070279035 - Transformer for impedance-matching power output of rf amplifier to gas-laser discharge: An RF impedance-matching transformer for matching the output impedance of an RF amplifier to the discharge of a gas-discharge laser includes upper and lower dielectric plates arranged face-to-face and bonded together. A primary U-shaped strip winding is embedded in the bonded surface of one of the dielectric plates. A secondary... Agent: Stallman & Pollock LLP