Electricity: power supply or regulation systems inventions 01/06

20060017422 - Dc voltage converter: A DC voltage converter is provided that cyclically converts an input-side supply voltage into an output voltage, and includes an inductive storage element connected between a supply voltage terminal and, in a manner such that it is coupled via a first switch, a reference potential terminal. The capacitively buffered terminal...

20060017421 - Method and apparatus for preventing boosting system bus when charging a battery: A controllably alternating buck mode DC-DC converter conducts cycle by cycle analysis of the direction of inductor current flow to decide whether to operate in synchronous buck mode or standard buck mode for the next successive cycle. For each cycle of the PWM waveform controlling the buck mode DC-DC converter,...

20060017423 - Dual power bus for battery powered device: The present invention relates to battery power peripheral devices such as MP3 players which are also periodically connected to another power source such as a mains wall socket or USB cable power bus. In particular, but not exclusively, the present invention relates to regulation of these voltage sources. In general...

20060017424 - Current averaging circuit for a pwm power converter: A current averaging circuit for averaging a piecewise linear switching current waveform of a PWM power converter including first, second and third sample and hold circuits and a sample averaging circuit. The first sample and hold circuit samples a short duration of the current waveform for each PWM cycle and...

20060017425 - Device for storing electrical energy: The invention relates to a device consisting of a storage device for storing electrical energy. This may, for example, be a battery, an accumulator or another electrical storage device, for example a capacitor (double-layer capacitor). In the present application, the object is now pursued of keeping the consumption of electrical...

20060017426 - Switching controller having frequency hopping for power supplies: A switching controller having frequency hopping is used for reducing the EMI of a power supply. A pattern generator generates a digital pattern code in response to a clock signal. An oscillator generates an oscillation signal for determining a switching frequency of a switching signal. A programmable capacitor coupled to...

20060012346 - Overshoot suppression circuit for a voltage regulation module: An overshoot suppression circuit comprises a switch for coupling to an output of a voltage regulation module and a voltage detector for detecting an output voltage at the output. When the load to the voltage regulation module changes from heavy to light to result in the output voltage higher than...

20060012347 - System and method for minimizing the charging time of a battery: A system and method are disclosed for charging a battery in the least possible time in the presence of competing energy demands. A single source of energy is used to charge a battery and also to provide energy to one or more devices. Circuitry insures that the maximum possible amount...

20060012348 - Coupled inductor dc/dc converter: DC/DC converter for managing high voltage gain that includes an input side having a high tap and a low tap, an output side having a high tap and a low tap, a converter circuit interconnecting the input side and the output side, and a steering branch having at least one...

20060012349 - Fet current regulation of leds: Field Effect Transistors (FETs) are used to regulate current in a light emitting diode (LED). FETs are fundamentally voltage driven devices, where output current is governed by junction voltage. Since junction voltage can be controlled with little or no support circuitry, FETs present a solution to current regulation where cost,...

20060012350 - Safety device for limiting current and voltage: The invention relates to a safety barrier for limiting the current and voltage of an electrical consumer (15) connected downstream thereof. The safety barrier comprises an input terminal (8) and an output terminal (16) and an input and output terminal (10, 17) of a common line (12), and has at...

20060012351 - Apparatus and method for sliding-mode control in a multiphase switching power supply: A current-sharing multiphase sliding-mode switching power supply (24) and method of operation are presented. A bipolar power source (22) is coupled to a switch (30) for each phase (28), each switch (30) is in turn coupled to an inductance (32), and a capacitance (36) is coupled to the inductances (32)...

20060012353 - Apparatus and method for fixed-frequency control in a switching power supply: A sliding-mode switching power supply (24) having N phases (28) and a method of operating the power supply (24) are provided. N switches (30) are coupled to a bipolar power source (22), with each switch (30) effecting one phase (28). An inductance (32) is coupled to each switch (30), and...

20060012352 - Apparatus and method for transient control in a multiphase switching power supply: A multiphase sliding-mode switching power supply (24) and a method of operating the power supply (24) are provided. A switch (30) for each phase (28) is coupled to a bipolar power source (22), with each switch (30) effecting one phase (28). An inductance (32) is coupled to each switch (30),...

20060012354 - Step-down circuit: Even when, for example, electric charge is injected into the output transistor due to external factor such as a noise from the outside, to prevent the step-down voltage from rising, the step-down circuit is comprised of an N channel type output transistor which controls the voltage at the control end,...

20060012355 - Control circuit for a polarity inverting buck-boost dc-dc converter: A control circuit for a polarity inverting buck-boost DC-DC converter, includes an operational trans-conductance amplifier that has inputs to which a sensed voltage difference signal is applied and an output connected to an input of a voltage-to-duty-cycle converter. A compensation capacitance is connected between the output of the amplifier and...

20060012358 - Apparatus and method for state-variable synthesis in a switching power supply: A sliding-mode switching power supply (24) having N phases (28) and a method of operating the power supply (24) are provided. N switches (30) are coupled to a bipolar power source (22), with each switch (30) effecting one phase (28). An inductance (32) is coupled to each switch (30), and...

20060012357 - Dc/dc converter: A DC/DC converter. In the DC/DC converter, a DC/DC conversion circuit provides an output voltage to a storage capacitor upon receiving an enable signal. First and second resistors are connected in series to produce a first voltage according to the output voltage. A Schmitt trigger is coupled to the first...

20060012356 - Voltage regulator with adaptive frequency compensation: A voltage regulator includes a first and second amplifier stage, an output stage, and a variable zero circuit. The first amplifier stage is coupled to receive a reference voltage and introduces a first pole of the voltage regulator. The second amplifier stage is coupled to the first amplifier stage and...

20060012359 - Switching power supply system for automatically regulating circuit operating frequency and method thereof: The invention describes a switching power supply system for automatically regulating an operating frequency and the method. The switching power supply system has a sensing and monitoring unit connected to the computer system for detecting the operating status of the computer system and outputting a detection value, a setting unit...

20060006849 - Inductor compensating circuit: An inductor compensating circuit, comprising a first inductor, a second inductor, and a third inductor. A source of voltage applies an AC voltage to the first inductor. Two transistors are connected as a differential pair. A current source is connected to the source of the transistors, and the first inductor...

20060006850 - Direct-current power supply and battery-powered electronic apparatus and equipped with the power supply: A bypass control section (6) maintains a bypass switch (5) in the ON state during the period when a battery voltage (Vi) is higher than the output voltage (Vo) to an external load (L). Upon falling of the output voltage (Vo) at a desired voltage (ET), a converter control section...

20060006851 - Power switching circuit with active clamp disconnect for load dump protection: A power switching circuit supplying electrical power to a load comprising a power MOSFET semiconductor switch having a gate electrode and two main current carrying electrodes and a back biased body zener diode, an active clamp for clamping a voltage between one of the main current carrying electrodes provided with...

20060006852 - Dc-dc converter circuit: Provided is a DC-DC converter circuit which is stably operated without being affected by a size of an output capacitor (111) and a cost thereof. When a switching element is turned on so that a charge current that was flowing into an output capacitor flows into the switching element, the...

20060006853 - Power switching circuit with current sharing capability: A power switching circuit comprising a first power switching device the first power switching device having a control electrode and two main current carrying electrodes, a sense circuit for providing a signal proportional to the current through the first power switching device and an active clamp circuit connected to said...

20060006855 - Charge pump dc/dc converter with constant-frequency operation: A DC/DC voltage converter includes a charge pump circuit including a pump capacitor coupling at an output node, a switching device for switching the charge pump circuit between a first phase and a second phase, and an adjustable resistor for adjusting a magnitude of the output voltage at the second...

20060006854 - Switching regulator with advanced slope compensation: A switching regulator circuit with improved slope compensation for providing a regulated voltage to a load. The regulator circuit includes a power source and a switch circuit configured to control the coupling of the power source to the load. The operation of the switch circuit is controlled by a control...

20060006856 - Logic controlled high voltage resonant switching power supply: Methods and apparatuses for a low EMI power supply. The power supply may include a control circuit, a power switch connected to the control circuit, an anti-parallel diode connected to the power switch, an inductor coupled to the anti-parallel diode, an output diode coupled to the inductor, and an output...

20060006857 - Method for controlling the operation of a low-dropout voltage regulator and corresponding integrated circuit: An integrated circuit including at least one low-dropout voltage regulator (LDO) capable of delivering a regulated output voltage using a reference voltage (VREF), comprises means for generating a substitution voltage (VRMP) in the form of a ramp and control means capable of replacing the reference voltage (VREF) by the substitution...

20060006858 - Method and apparatus for generating n-order compensated temperature independent reference voltage: A reference voltage generator includes a plurality of signal generators for producing N+1 signals respectively corresponding to N+1 temperature dependent characteristics, a combining module coupled to the signal generators for combining the N+1 signals to form a combined signal, and a signal to voltage converter coupled to the combining module...

20060001407 - Voltage regulator: To provide a voltage regulator which is excellent in responsibility with low power consumption. A transient response improving circuit of a voltage regulator is provided with a detection portion for detecting a power supply voltage. An operating current of a voltage amplifying circuit is controlled by detecting a fluctuation level...

20060001409 - Dc/dc converter: A DC/DC converter in which the DC output set voltage can be raised includes a switching transistor arranged to input an external power supply voltage, a smoothing circuit, a switching control circuit to which the internal power supply voltage is supplied and arranged to control the switching transistor, a comparison...

20060001408 - Digital calibration with lossless current sensing in a multiphase switched power converter: Disclosed is a multi-phase power regulator that accurately senses current at a load in a lossless manner and adjusts the power supplied to the load based on the sensed current. Also disclosed is a method of calibrating a multiphase voltage regulator by applying a known calibration current at the load...

20060001410 - Power supply apparatus using synchronous rectified step-down converter: A power supply apparatus includes a step-down converter, a regulator, a PWM signal generator and a bypass switch and is operated by switching between the step-down converter and the bypass switch for output. While an input voltage is output unmodified by the bypass witch, an offset circuit offsets an error...

20060001411 - Dc converter with halt mode setting means: A DC converter with a halt mode setting is disclosed for preventing the occurrence of over-current while alleviating the increase in the size of circuits, along with a method for setting up such a halt mode. The DC converter includes a semiconductor switch, a clock generator for outputting a clock...

20060001412 - Voltage reference circuit using ptat voltage: A voltage reference generator is disclosed that includes a current generator for generating a current that is proportional to absolute temperature (PTAT), the current generator having an internal resistance. This provides a PTAT current that is proportional to the resistance and wherein the temperature coefficient of the PTAT current is...

20060001413 - Proportional to absolute temperature voltage circuit: A proportional to absolute temperature voltage circuit. A voltage circuit including a first amplifier having first and second inputs and having an output driving a current mirror circuit is provided. Outputs from the current mirror circuit drive first and second transistors which are coupled to the first and second input...