Electricity: power supply or regulation systems inventions 06/06

20060139013 - Power supply apparatus, backlight assembly and liquid crystal display apparatus having the same: A power supply apparatus includes an inverter controller, a power transforming part and a connecting part. The power transforming part converts a direct current supplied from the inverter controller into an alternating current to output first and second polarity currents. The connecting part outputs the first and second polarity currents...

20060139014 - Z-state circuit for switching regualtors: The four types of the Z-state circuits basically include a sensing gate, two stacked PMOS transistors, and a feedback line. The sensing gate senses a voltage at its input assuming no feedback is applied. Again, the corresponding output of two stacked PMOS transistors is assumed to be connected to the...

20060139016 - Multi-phase buck converter: A buck converter for providing an output voltage to a load, including a plurality of output switch arrangements having respective output inductors coupled to an output capacitor, the switch arrangements being controllable to provide phase output currents to the output capacitor; a plurality of phase output arrangements respectively coupled to...

20060139015 - Switching power supply transient suppression: A number of output phases of a switching power supply are controlled, to regulate its output. An under-voltage condition is responded to, by overriding the control of the output phases, forcing some or all of the phases on, depending on a detected magnitude of a change in the power supply...

20060139019 - Dc-to-dc step-up converter and conversion method thereof: The present invention discloses a DC-to-DC step-up converter to which a logic control unit is added in order to reduce the ripples of a DC output voltage and improve the power quality. The converter of the present invention comprises a step-up circuit, a ring oscillator, a divider circuit, a PFM...

20060139018 - Device and method for low-power fast-response voltage regulator with improved power supply range: An apparatus and method for regulating voltage levels. The apparatus includes a first transistor and a second transistor coupled to the first transistor. The first transistor is configured to receive a reference voltage, and the second transistor is configured to receive a feedback voltage and generate a first voltage. The...

20060139017 - Interface circuit for electronic test system: An electronic interface circuit. The electronic interface circuit includes a stimulus circuit which further includes a first voltage source, a driver circuit having first and second driver outputs, a first switch having first-switch input, first-switch output, and first-switch control input, a first filter having first-filter input and first-filter output, a...

20060139020 - Simple partial switching power factor correction circuit: A boost type power supply circuit for providing a DC output voltage comprising first and second semiconductor switches coupled between respective input lines and a common connection, an AC input voltage from an AC source being supplied across the input lines; first and second diodes coupled in series with respective...

20060139021 - Serial connected low-loss synchronously switchable voltage chopper: The invention relates to a buck converter comprising: a pair P—0 of switches SB, SH in series and connected to an input terminal B of the converter by the switch SB, K other additional pairs P—1, P—2, . . . , P_i, . . . P_K−1, P_K of switches in...

20060139022 - System and method for generating a reference voltage: Systems and methods for generating a reference voltage are disclosed. In one embodiment, an output voltage is generated that is the sum of a desirable reference voltage component and an undesirable voltage component. An additional voltage component that tends to be equal and opposite in sign to the undesirable voltage...

20060132104 - Digital control of bridgeless power factor correction circuit: A circuit for providing power factor correction includes a bridgeless boost converter circuit and a control circuit receiving an input AC line voltage of the bridgeless boost converter circuit, wherein the control circuit provides a pulse width modulated signal to control the on time of a PFC switch of the...

20060132105 - Controlling inrush current: A control circuit and method for controlling a power factor correction circuit comprising: an inductor having an input terminal to receive an input voltage and an output terminal series connected to an anode of a diode; a first capacitor connected between a cathode of said diode and ground; a first...

20060132106 - System and method for regenerative burn-in: A regenerative load that includes an input configured to draw a specified current and an output configured to provide an output voltage and current is described. The regenerative load configured to maintain the output voltage to cause the regenerative load to draw the specified current from the unit under test....

20060132107 - Low drop-out voltage regulator and method: A low drop-out voltage regulator (300) and method comprising: a differential transistor arrangement (Q1-Q2) for receiving a reference voltage and in dependence thereon producing a regulatred output voltage; an output stage (Q3) for coupling to a load; and a control loop (310) coupled to the differential transistor arrangement for providing...

20060132109 - Audio noise mitigation for power state transitions: An audio noise mitigation approach. For one aspect, a first voltage associated with a first power management state is provided. A signal responsive to an indication associated with at least a first type of periodic exit event is received and responsive to the signal, a transition to a second voltage...

20060132110 - Fine resolution pulse width modulation pulse generator for use in a multiphase pulse width modulated voltage regulator: Disclosed is a fine resolution pulse width generator for use in a multiphase pulse width modulated voltage regulator. The fine pulse width is generated by first generating a pulse with a coarse pulse width and one or more delayed replicas thereof. Then, digitally controlled analog interpolators are used to generate...

20060132112 - High efficiency, high slew rate switching regulator/amplifier: A regulating apparatus having an output node and being operative for regulating the voltage level at the output node in response to a reference signal provided as an input to the regulating apparatus. The regulating apparatus includes a linear amplifier stage operative for receiving the reference signal and being capable...

20060132111 - Power supply with multiple modes of operation: A high efficiency switching power supply including an analog front end, a battery control circuitry portion, a display and equalization circuitry portion, field effect transistor (FET) drivers, an isolated power supply transformer circuitry (and three associated sets of tap circuitry), microcontroller circuitry, oscillator circuitry, overcharge protection circuitry, programmable logic circuitry...

20060132108 - Programmable voltage regulator configurable for double power density and reverse blocking: A programmable voltage regulator configurable for reverse blocking and double power density is disclosed herein. The programmable voltage regulator includes an error amplifier that couples to receive a reference voltage. A first NMOS pass transistor connects between an auxiliary voltage input node and the output terminal of the voltage regulator,...

20060132113 - Synchronous buck dc/dc converter to perform an improved switching operation by adjusting variable resistor: A synchronous buck DC/DC converter to perform an improved switching operation by adjusting a variable resistor is provided. The synchronous buck DC/DC converter includes a switching unit for switching two PWM signals inverted with a dead time and outputting the PWM signals, a smoothing circuit for outputting DC power using...

20060132114 - Step voltage generation: A step voltage generator includes multiple trimmable voltage references. Each of the trimmable voltage references uses a flash cell with a variable threshold voltage and a feedback loop to trim a reference voltage. The threshold voltage of the flash cell can be programmed to affect the reference voltage....

20060125450 - Chipset for isolated power supply with new programmable synchronization architecture: The present invention is a chipset for an isolated power supply having an innovative oscillator. Preferably, the present invention includes a primary controller and a secondary controller. The primary controller can have the control and drive circuitry for the chipset. The secondary controller can provide rectification signals that can be...

20060125451 - Integrated fet synchronous multiphase buck converter with innovative oscillator: A power conversion system, preferably a buck converter, having (i) an oscillator, (ii) a pulse width modulator, (iii) and a nonoverlap clock generator and level shifter, wherein the improvement comprises the elimination of an external resistor divider is described. The buck converter can convert input voltage ranging from approximately 3V...

20060125453 - High precision power detector: A power detector having temperature compensation for improved measurement performance includes a pair of rectifier transistors coupled to a differential input signal biased by a first temperature dependent current. An output of the pair of rectifier transistors provides a first component of a differential DC output signal. The first component...

20060125452 - Mainboard and power control device thereof: A power control device includes a comparison unit, a control unit and a switch unit. The comparison unit electrically connects to a first power rail and a second power rail, respectively, and generates a comparing signal according to a reference signal, a first voltage level and a second voltage level....

20060125458 - Adc transfer function providing improved dynamic regulation in a switched mode power supply: A power supply comprises at least one power switch adapted to convey power between input and output terminals of the power supply, and a digital controller adapted to control operation of the at least one power switch responsive to an output measurement of the power supply. The digital controller comprises...

20060125456 - Buck converter: A buck converter includes a first transistor, a second transistor, a filter circuit, a capacitor and a switch. The first transistor has a drain for receiving a first DC voltage, a gate for receiving a first control signal, and a source coupled to a node. The second transistor has a...

20060125455 - Burst-mode switching voltage regulator with esr compensation: System and method for a burst-mode switching voltage regulator with good stability and small output voltage ripple. A preferred embodiment comprises a current sense circuit coupled to a power switch in the burst-mode switching voltage regulator to sense a current flowing through the power switch. The sensed current can then...

20060125457 - Power conversion apparatus for pulse current: The present invention discloses a power conversion apparatus for pulse current suitable for electrical discharge machining. The power conversion apparatus comprises a linear power conversion circuit and a switching power conversion circuit. The linear power conversion circuit offers a fast response to changes in output load and is used to...

20060125454 - Switching voltage regulator operating without a discontinuous mode: A switching circuit operates with a first operating state and a second operating state. During the first operating state, the switching circuit allows a switching current to linearly increase. During the second operating state, the switching circuit allows the switching current to linearly decrease. A control circuit is coupled to...

20060125459 - 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...

20060125461 - Constant voltage generator and electronic equipment using the same: A constant voltage generator is comprised of a band gap reference circuit, a current supply circuit, a starting circuit and a voltage-current conversion circuit, and the starting circuit is further comprised of a first and second load elements, a first transistor which is connected to the first load element, a...

20060125460 - Reference current generator: Provided is a low-reference-current generator that includes a circuit employing two feedback loops enabling it to operate even at a low voltage, has a high power supply rejection ratio (PSRR) to control power supply noise, and simply forms a voltage without a voltage-to-current converter used in a conventional general reference...

20060125462 - Power supply circuit for producing a reference current with a prescribable temperature dependence: A power supply circuit is provided for producing a reference current with a prescribable temperature dependence. The circuit includes two current sinks, which at their respective input take up a first input current (I1) or a second input current (I2), and in which current sinks at their respective outputs are...

20060125463 - Voltage-controlled current source: A voltage-controlled current source (VCCS) is provided. The VCCS controls an output current according to a controlling voltage. The VCCS includes an operational amplifier (OP-amplifier), a transistor, a resistor and a current mirror. The present invention utilizes the characteristics of the OP-amplifier to compensate for the voltage difference between the...

20060113968 - Novel benzonaphthyridines: The invention relates to a method and device for transmitting and setting the electrical charge and energy of piezoelectric actuators, which are preferably mounted on moving systems, to which an electrically conductive connection is impossible or can only be made with considerable difficulties. An alternating current of a higher frequency...

20060113969 - Voltage detection circuit, overcurrent detection circuit, charging current control system, and voltage detection method: A voltage detection circuit detects an input voltage in first and second periods to average by using a switch circuit and a sampling circuit. At this time, the input voltage of the second period is added to the input voltage of the first period so that a polarity of variations...

20060113970 - System, circuit and method for tuning a resonant circuit: A circuit may be tuned to resonate at a driving frequency. The circuit includes a source that provides an output at a drive frequency and a resonant circuit having an input coupled to the source, an output, and first and second selectable resonant frequencies. The first resonant frequency is below...

20060113971 - Apparatus and circuit for power supply, and apparatus for controlling large current load: A power supply apparatus includes a diode that is disposed in the path of a main current that is a subject of power control. The diode includes a substrate; a gallium-nitride buffer layer formed on the substrate; a gallium-nitride layer formed on the gallium-nitride buffer layer; and an n-type aluminum-gallium-nitride...

20060113972 - Low quiescent current regulator circuit: A voltage regulator includes first and second transistors arranged in parallel and configured to regulate current flow to an output node, and a sensing circuit configured to sense a voltage level at the output node and provide a signal proportional thereto the regulator also includes a control circuit configured to...

20060113973 - Dc power supply apparatus: A DC power source device comprises a MOS-FET 5 which performs the intermittent switching operation for converting DC input from a DC power supply 1 into high frequency electric power; a control circuit 9 for turning MOS-FET 5 on and off; and a rectifying smoother 6 for converting the high...

20060113975 - Method and apparatus for controlling output current of a cascaded dc/dc converter: A circuit and a method for controlling output current of cascaded switching power converters having a buck type output stage are disclosed. The circuit comprises two comparators for sensing input and output current, a logic gate for processing the output states of the comparators, and a pulse width modulator circuit...

20060113974 - Method of forming a power supply control and device therefor: In one embodiment, a power supply controller has a variable frequency oscillator that is used for controlling a PWM controller. The power supply controller varies a frequency of the variable frequency oscillator....

20060113979 - Power supply driver circuit: A power supply driver circuit with low power losses and desired response characteristics with respect to changes in output and its miniaturization is provided. In a driver IC constituting a switched-mode power supply equipment controlling the switching, by pulse width modulation, of first and second power transistors passing a current...

20060113980 - Semiconductor integrated circuit for controlling power supply, an electronic component and a power supply device: A semiconductor integrated circuit for controlling power supply which has a function of preventing a reverse current flowing in a coil under a light load condition and ensures good response of output voltage to load variation. In a synchronous rectification switching regulator having a reverse current detection circuit which can...

20060113976 - Step-up converter having an improved dynamic response: A step-up converter includes input and output terminals, step-up conversion circuitry, a first feedback path and a drive circuit. The input terminals are configured to receive an input DC voltage and the output terminals configured to provide an output DC voltage. The step-up conversion circuitry is coupled between the input...

20060113977 - System and method for providing voltage regulation in a multi-voltage power system: A voltage regulator system is disclosed for use in selectively regulating a voltage source at a first output voltage potential and a second output voltage potential. The voltage regulator system includes a reference unit, a filter unit and a current source unit. The reference unit is for receiving a voltage...

20060113978 - Voltage regulator: In a voltage regulator according to an embodiment of the present invention, a delay circuit delays an enable signal by a delay time or less, the delay time corresponding to a certain time from a start of charging of the output capacitor to a completion of the charging of the...

20060113981 - System and method for providing digital pulse width modulation: A pulse width modulation system for use in a switching power supply circuit provides high-resolution pulse width modulated signals. The pulse width modulation system is configured to receive a control signal comprising a (m+n)-bit binary word and to provide a pulse width modulated signal with a predetermined average duty cycle...

20060113982 - Regulated current mirror: A regulated mirror current source circuit has an output transistor, a regulator for controlling the output circuit, and a current mirror having two or more current paths. The first path of the mirror is coupled in series with a current path of the output circuit, and the second path is...

20060113983 - Power apparatus and method to provide high voltage: A power apparatus and method thereof include first and second signal processing units. The first signal processing unit filters and adjusts a first inputted PWM signal in a predetermined bandwidth to set a reference potential. The second signal processing unit compares the reference potential with a second inputted PWM signal,...