Electricity: power supply or regulation systems inventions 04/06

20060087294 - Gas turbine apparatus: A gas turbine apparatus has an air compressor for compressing air, a combustor capable of combusting the air compressed by the air compressor, and a first fuel supply system configured to supply a fuel to the combustor. The gas turbine apparatus also has a turbine rotatable by a gas discharged...

20060087296 - Dc/dc converter: A DC/DC converter includes a first switchcoupled to an input voltage and to a reference voltage. The first switch is suitable for driving a load connected to the output terminal of the DC/DC converter. The DC/DC converter includes an inductor having an intrinsic resistance and being connected to a terminal...

20060087295 - Non-isolated power conversion system having multiple switching power converters: A non-isolated power conversion system has an input stage and an output stage. A plurality of cascaded switching power converter stages are coupled between the input stage and the output stage. Each of the plurality of switching power converter stages has at least one switch that is activated in accordance...

20060087297 - Multi-mode multi-phase inductor-less dc/dc regulator: A multi-mode multi-phase inductor-less DC/DC regulator is powered by a voltage source and produces an output to a load. It includes at least two modes of operation, and allows automatic switching among modes. Each mode includes a charging phase and a transfer phase. Mode selection and automatic mode switching determination...

20060087298 - Power factor correction circuit and method of varying switching frequency: A power factor correction (PFC) circuit (10) includes a pulse width modulator (31) operating in response to a clock signal (CLK) for switching a coil current (ICOIL) over a charging period (TCHG) to correct a power factor at a node (32). The coil current discharges over a discharging period (TDSCHG)...

20060087299 - High frequency voltage regulating transformer based converter: A switching regulator and method of fabricating a switching regulator is disclosed. In one embodiment a switching regulator comprises a transformer having a primary winding and a secondary winding, an inductor (L) connected to an input of the primary winding, and a capacitor (C) connected across the primary winding of...

20060087302 - Mmic dc-to-dc converter: An improved Monolithic Microwave Integrated Circuit DC-to-DC voltage converter fabricated in GaAs MESFET technology is introduced. The converter comprises a differential oscillator having crossed-coupled symmetrical inductors that ensure low-noise operation. The converter further comprises a highly-efficient synchronous rectifier and a start-up circuit....

20060087300 - Semiconductor device: A pair of upper and lower semiconductor switching elements can switch between the conductive state and the non-conductive state when control voltages vary. A controller controls the levels of the control voltages to alternately turn on the upper and lower semiconductor switching elements. The controller controls the absolute value of...

20060087301 - Very high frequency passive transponder, in particular a uhf transponder, with a voltage multiplier or booster at the entry of its logic circuit: The passive transponder comprises an antenna (2) connected to an integrated circuit (6) the analogue part of which includes a passive voltage rectifier (8) supplying a rectified voltage (VDC1) and an active multiplier or booster (16) for said rectified voltage which is formed by a capacitor (C2) switched to a...

20060087303 - Controller for a dc to dc converter having linear mode and switch mode capabilities: A controller for a DC to DC converter. The controller may comprise linear mode circuitry and switch mode control circuitry. The linear mode control circuitry may be capable of providing a first control signal to a transistor of the DC to DC converter. The transistor may operate in a linear...

20060087304 - Buck converter with high efficiency gate driver providing extremely short dead time: A buck converter has a driver circuit with a drive transformer that provides complementary voltages to the buck converter switches. The drive transformer may have two secondary windings, with one winding for each converter switch. As one converter switch experiences a rising gate voltage, the other converter switch experiences a...

20060082348 - Reactive power compensation to minimize step voltage changes and transients: The invention features a system and approach for minimizing the step voltage change as seen by the utility customer as well minimizing transients imposed on the fundamental waveform of a normal voltage carried on a utility power network when a reactive power source (e.g., capacitor bank) is instantaneously connected to...

20060082349 - Detection of the zero crossing of an a.c. voltage: A circuit for detecting the zero crossing of a variable voltage across at least one switching element, including circuitry for measuring the slope of the voltage when it varies in a given direction, and for indicating a zero crossing if this slope is comprised within a range of values....

20060082350 - 3-phase electronic tap changer commutation and device: The invention provides a novel 3-phase electronic tap changer commutation and related device. In one embodiment, the invention includes firing a commutation silicon controlled rectifier (SCR), removing a gating signal from a first SCR connected to a first of the plurality of taps, firing a second SCR connected to a...

20060082351 - Low power operation of back-up power supply: Systems and methods are disclosed to provide for low power operation of a back-up power supply. In one aspect, a back-up power supply system may include a switch system, such as a voltage regulator, that is coupled to provide an output voltage for charging a back-up power device up to...

20060082352 - Switching power supply circuit and electronic apparatus provided therewith: In a switching power supply circuit, completion of discharging of a capacitance provided in a soft-start circuit requires a period longer than a cycle with which an activating/deactivating portion switches switching control operation of a driving portion (which performs switching control to turn on/off a switching device provided in a...

20060082353 - Negative current control for voltage regulator: A system may include a voltage regulator controller to provide a control signal, a voltage regulator converter comprising a power switching element coupled between an output node of the voltage regulator converter and ground, the voltage regulator converter to receive the control signal, and a logic circuit to detect current...

20060082354 - Load symmetrization with controllable inductor: A method for compensation and symmetrization of a three-phase system with a single-phase load is provided. At least one variable inductor for connection to the three-phase system is employed in the method. The inductor's inductance is adjusted to obtain a resistive single-phase load and/or a three-phase load which draws balanced...

20060076936 - Circuits and methods for flexible current partitioning in monolithic switching regulators: A monolithic switching regulator that flexibly distributes its output current among its output channels is provided. The monolithic switching regulator includes one or more additional channels that are externally connected to the output channels for providing additional current partitioning configurations. The external connections may be autosensed or programmed with an...

20060076937 - Dual supply circuit: A circuit intended to provide two D.C. voltages of inverted polarities based on an A.C. voltage, comprising: two capacitors having their respective electrodes connected to two terminals intended to receive said A.C. voltage and having their second respective electrodes connected to each other by two first diodes in anti-series; a...

20060076938 - Linearly regulated power supply: A linearly regulated power supply is provided for providing a regulated load voltage to a load. In a preferred embodiment, the linearly regulated power supply includes: a voltage reference circuit for providing a first voltage reference; a resistive voltage divider connected to the voltage reference circuit for receiving the first...

20060076939 - Electrical converter for converting electrical power: An electrical converter (1) comprising a converter input (IN1, IN2) for receiving electrical power; a converter output (OUT1, OUT2) for releasing electrical power; an electrical energy storage device (2) having a storage input connected to a converter input (IN1, IN2) and having a storage output connected to a converter output...

20060076940 - Information processing electronic device: Provided is an information processing electronic device by which even if a CPU and/or information processing integrated circuit enters a sleep mode in a frequency of 100 to 10,000 times per second, a leakage current loss caused in the CPU or integrated circuit in a transition time of rise and...

20060076942 - Step-down controller circuit: A step-down controller has an input having a first and a second input terminal for applying an input voltage, an output having a first and a second output terminal at which an output voltage can be provided, a series circuit including a switch and an inductance which is coupled between...

20060076941 - Switching regulator: The present invention provides a short-circuit protecting circuit of a switching regulator which does not require a capacitor having a large capacity in order to obtain a sufficient duty time. A pulse generating circuit for generating one clock with a short-circuit detection signal as a trigger signal is added, and...

20060076943 - Auxiliary power switching arrangement for pci express, pc's and similar applications: A series pass transistor voltage regulator is described having a main power source and an auxiliary power source. When the main power source voltage falls to a level the regulator can no longer use, the regulator seamlessly draws power from the auxiliary source. A voltage dropping circuit of two series-coupled...

20060071648 - Power management integrated circuit: A central processing unit (CPU) is disclosed. The CPU includes a CPU die; and a power management die bonded to the CPU die in a three dimensional packaging layout....

20060071649 - Apparatus and method for multi-phase transformers: A method and apparatus for multi-phase transformers are described. In one embodiment, a coupled inductor topology for the multi-phase transformers comprising N primary inductors. In one embodiment, each primary inductor is coupled to one of N input nodes and a common output node. The transformer further includes N−1 secondary inductors...

20060071650 - Cpu power delivery system: A central processing unit (CPU) is disclosed. The CPU includes a CPU die; and a voltage regulator/converter die bonded to the CPU die in a three dimensional packaging layout....

20060071651 - Control circuit of dc-dc converter and control method thereof: There are provided a control circuit of a DC-DC converter of a synchronous rectification system which can realize rapid lowering of an output voltage with low power consumption at the stop of power supply, and a control method thereof. While a power supply stop signal is at low level, a...