Electricity: power supply or regulation systems inventions 08/06

20060192536 - Dc-dc converter for power level tracking power amplifiers: A DC-to-DC converter as described herein is suitable for use as a variable voltage supply for an RF power amplifier. The DC-to-DC converter includes a buck converter for providing relatively low voltage and current output, and a linear voltage regulator for providing relatively high voltage and current output. When operating...

20060192537 - Power line communication using power factor correction circuits: A PFC circuit modulating a power line using pulse width modulation (PWM) to drive a power MOSFET and series inductor across the power line. Since many modern electronic systems include a power factor correction circuit (PFC) that already includes a series inductor and power MOSFET, a PLC is incorporated into...

20060192538 - Low drop-out voltage regulator with enhanced frequency compensation: The present invention is a voltage regulator circuit with enhanced frequency compensation. The voltage regulator includes an error amplifier, a dynamic bias circuit, an enhanced frequency compensation unit, a pass device and a compensation circuit. A signal from the pass device acts as an input signal of the error amplifier...

20060192539 - Switching regulator control circuit and switching regulator: A switching regulator in which a ceramic capacitor is used as an output capacitor is provided to secure a stable operation in a control loop system. A phase compensation circuit capable of forming a zero point is inserted between a differential pair of an error amplifier in the control loop...

20060192540 - Off-line converter with digital control: A DC to DC converter comprising an energy storage element comprising an energy storage element input and an energy storage element output, the energy storage element input coupled to receive a first power level and the energy storage element output providing a second power level. The converter also comprises a...

20060192541 - Switching regulator: A switching regulator for generating a regulated output voltage comprises a charging switch, a network with a coil, a capacitor and a diode as well as a control to open and close the charging switch. On the output side, the network has a positive output rail and a negative output...

20060192542 - Voltage regulation system comprising operating condition detection means: The invention relates to a system for generating an output voltage (Vout) from an input voltage (Vup), said system comprising:—regulation means (T1) for regulating said output voltage (Vout) to a target voltage level (Vcons), said regulation means (T1) comprising a control terminal intended to receive a regulation signal (SR) and...

20060192543 - Early effect cancelling circuit, differential amplifier, linear regulator, and early effect canceling method: In an input transistor of current mirror circuit, it is intended to prevent the current generated by Early effects from appearing in the output current of the current mirror circuit. Having an Early voltage detector 22 of same connection and structure as a driver circuit 21, and connected in parallel...

20060192544 - Adjustable regulated power device: An adjustable regulated power device includes, for example, an electronic potential device, a regulated device and a control device. The electronic potential device includes an electronic potentiometer having a plurality of potentiometers. The regulated device includes a voltage regulator connected to an input power and at least one first potentiometer...

20060186864 - High voltage switching apparatus: A switching arrangement for a high voltage load provides high voltage pulses to the load. The switching arrangement includes N switching modules where N is typically 75. A load capacitance of Cd is required to avoid voltage overshoot at the load and is provided by a capacitance of nCd arranged...

20060186865 - Voltage regulator: A voltage regulator may include an output stage controlled by a control voltage determined as a function of the difference between a reference voltage and a signal representing an output voltage of the regulator generating the output voltage on an output node of the regulator. An auxiliary stage may be...

20060186868 - Current control circuit with limiter, temperature control circuit, and brightness control circuit: A current control circuit with limiter includes a voltage follower as the output unit of the current control circuit, the voltage follower including a transistor, the circuit further including two operational amplifiers and two diodes. In a first operational amplifier, the non-inverting input receives an input voltage to the current...

20060186869 - Dual stage voltage regulation circuit: A voltage regulator for supplying two types of loads on a common chip, namely a high current load and a low current load. The voltage regulator employs a feedback loop to supply the low current load with a fine degree of regulation and a feed forward arrangement to supply the...

20060186866 - Reducing line/ load regulation problems in switching regulators: A switching regulator provided according to an aspect of the present invention contains uses one or more error samples from prior iterations, in addition to an error sample of the present iteration, to determine the correction for the present iteration. Due to the use of multiple samples, a switching regulator...

20060186867 - Switching regulator: In a standby mode, a voltage step up DC/DC converter 5 supplies a power output voltage equal to or higher than a second set voltage which is lower than a first set voltage in a normal operating mode to a microcomputer (load) 1 with current supply performance which is smaller...

20060186870 - Regulating switching regulators by load monitoring: Apparatus and methods for controlling a voltage regulator are disclosed. Output voltage of the regulator can be controlled by monitoring headroom voltage measured as the difference of a fixed reference voltage and the output voltage. The fixed reference voltage can be provided as using a current source to drive a...

20060181252 - Switching power supply apparatus and electronic device using the same: Provided is a switching power supply unit which uses a multilayer board or a stack of planar conductors as the windings of transformers so as to reduce the volume of the transformers and to have high efficiency, small size and small noise. The switching power supply unit is formed by...

20060181253 - 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...

20060181254 - Apparatus and methods for regulated voltage: An electronic system according to various aspects of the present invention includes a memory and a supply regulation circuit having a regulated output to provide a selected voltage level. In one embodiment, the supply regulation circuit includes a reference voltage circuit connected to the supply and configured to receive a...

20060181255 - Apparatus and methods for regulated voltage: An electronic system according to various aspects of the present invention includes a memory and a supply regulation circuit having a regulated output to provide a selected voltage level. In one embodiment, the supply regulation circuit includes a reference voltage circuit connected to the supply and configured to receive a...

20060181256 - Switching power source, switching power source control method, electric apparatus having the switching power source, and printing apparatus having the switching power source: There is provided a switching power source capable of quickly responding to a change in output at high efficiency over a wide output voltage range. The power source includes an integrator, a comparator which compares an output from the integrator with a quantization reference value, and a sampling circuit which...

20060181260 - 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...

20060181259 - Current driver: A current driver that can control variation in the consumed current in conjunction with variation in the setting value of the driving current. The mirror current of transistors Q2-0 to Q2-7 at each of output circuits 10-1 to 10-160 keeps flowing through output terminal To1 or node N8 irrespective of...

20060181257 - Current mirror: The present invention relates to Current mirror for generating a constant mirror ratio, comprising an output transistor (Tout) having a base, an emitter and a collector, wherein a current flowing through the collector of said output transistor (Tout) constitutes an output current (Iout) of said current mirror and the collector...

20060181258 - Power supply circuit having voltage control loop and current control loop: A power supply circuit includes two pass transistors that conduct current from a voltage supply terminal to an output terminal. One of the pass transistors is smaller whereas the other is larger. Current through the smaller transistor is controlled by the voltage control loop such that the voltage on the...

20060176029 - Non-synchronous boost converter including switched schottky diode for true disconnect: A non-synchronous boost converter includes a switched Schottky diode to rectify the switched output voltage of the boost converter where the switched Schottky diode has forward conduction blocking capability. The switched Schottky diode has an anode terminal coupled to receive the switched output voltage, a cathode terminal providing the output...

20060176030 - Differential termination attenuator network for a measurement probe having an internal termination voltage generator: A differential termination and attenuator network having an internal common mode termination voltage generator includes first and second termination resistors coupled in parallel with corresponding resistive attenuator circuits. A monitoring circuit coupled to input nodes of the network generates an output signal representative of the combination of a DC common...

20060176031 - Dual output switching regulator and method of operation: A system and method of operation of a power switching circuit is provided that includes a charging switch configured to be connected to an inductor at one node and configured to receive control signals to open and close the charging switch. The circuit further includes a first channel coupled to...

20060176032 - Secure supply of an integrated circuit: A method and a circuit for scrambling the current signature of a load comprising at least one integrated circuit executing digital processings, including supplying at least the integrated circuit from a supply voltage external to the circuit by combining a current provided by a first linear regulator with a current...

20060176033 - Scrambling of the current signature of an integrated circuit: A method and a circuit for scrambling the current signature of a load including at least one integrated circuit executing digital processings, including the step of, at least on the load ground side, combining a current absorbed by a first linear regulator with a current absorbed by at least one...

20060176038 - Current-mode control for switched step up-step down regulators: A switched regulator circuit provides step-up and step-down operation in which the level of the input voltage can be greater, equal to, or less than a preset controlled output voltage. A four switch arrangement or two switch arrangement provides buck, boost, and buck-boost regulation under constant frequency valley-peak current mode...

20060176035 - Light load current-mode control for switched step up-step down regulators: A switched regulator circuit provides step-up and step-down operation at high efficiency during light load conditions. Switching loss is reduced in a four switch arrangement by limiting bottom MOSFET switching frequency. The possibility of overcharge in boost mode operation has been avoided by automatically changing to a buck mode operation...

20060176034 - Multi-resonant dc-dc converter: A power converter apparatus include a multi-resonant circuit comprising a series-resonant circuit and a frequency-dependent impedance connected in series with the series-resonant circuit and operative to counteract an inductance of the series-resonant circuit, a switching circuit operative to alternately apply first and second voltages to an input of the multi-resonant...

20060176037 - Protection for switched step up/step down regulators: A four switch voltage converter is regulated for buck mode and boost mode under constant frequency valley-peak current mode control. Protection circuits are responsive to output voltage and regulator current to prevent excessive current that otherwise might result from abnormally low output voltage short circuit, or spurious switching abnormalities during...

20060176036 - Variable frequency current-mode control for switched step up-step down regulators: A switched regulator circuit provides step-up and step-down operation in which the level of the input voltage can be greater, equal to, or less than a preset controlled output voltage. A four switch arrangement or two switch arrangement provides buck, boost, and buck-boost regulation under variable frequency valley-peak current mode...

20060176039 - Method and apparatus for a switch mode power supply that generates a high pulse width modulation while maintaining low noise sensitivity: A power supply with high pulse width modulation gain and low noise sensitivity has been disclosed. In one example, a control current is received at a control terminal of a regulator circuit. The control current includes a consumption current of the regulator circuit and a feedback current. A duty cycle...

20060176040 - Low power method of monitoring and of responsively initiating higher powered intelligent response to detected change of condition: A synchronous control system includes a logic controller (e.g., microprocessor) which can be put into low power standby or sleep mode by shutting off its clock. A quick-start oscillator (QSO) remains shut off to conserve power when not needed, but awakens rapidly and supplies clock signals to the logic controller...

20060176043 - Reference voltage circuit: A reference voltage circuit includes an operational amplifier, a first fixed resistance resistor, a second fixed resistance resistor, a third fixed resistance resistor, a first diode and a second diode. The reference voltage circuit further includes a fourth fixed resistance resistor having an end connected to a non-inverting input terminal...

20060176042 - Reference voltage generator and method for generating a bias-insensitive reference voltage: The present invention is directed to a device and method for generating a reference voltage. A reference voltage generator comprises a first circuit, a second circuit, and an external device. The first circuit generates a positive temperature coefficient voltage. the second circuit is coupled to the first circuit, biased with...

20060176041 - Temperature independent low reference voltage source: A circuit of the invention comprises a low voltage PTAT source. Current generators (t1, t2) are controlled so that their output currents I1 and I2, respectively, have temperature properties of the quotient VPTAT/R. The current I1 is conducted to a first terminal (X) on a first connection of a composition...

20060170399 - Power factor controller utilizing duel-switch configuration: An apparatus is directed to regulating a step down voltage across a load. The apparatus includes a regulator circuit (210, 310) arranged to couple power from an unregulated power supply V(+) to the load V(Out) in response to a control signal. The apparatus further includes a power control circuit (220,...

20060170400 - Dual-input power converter and control methods thereof: A dual-input power converter comprises two power stages using a common low-side element, a first input for coupling a first input voltage to the first power stage, a second input for coupling a second input voltage to the second power stage, and a controller for driving the first and second...

20060170401 - High-efficiency linear voltage regulator: A light-load power transistor and a heavy-load power transistor are connected in parallel between an input voltage and an output voltage. The light-load power transistor has a smaller current driving capability, i.e. a smaller dimension of a current path. During a light-load mode, only is the light-load power transistor activated...

20060170402 - Voltage regulator having improved ir drop: A regulated power source for supplying power to an external circuit includes a voltage sensing circuit and a voltage regulator. The voltage sensing circuit generates a feedback voltage by comparing voltage drops at a plurality of sense points within the external circuit. The feedback voltage is based on the maximum...

20060170403 - Voltage regulator with reduced power consumption in standby operating mode: A voltage regulator includes separate circuit paths used for generating regulated voltages in the normal operating mode and the standby operating mode. Circuit components that consume relatively high power in the normal operating mode are turned off during the standby operating mode. Thus, power consumption is minimized even while a...

20060170404 - Standard cmos low-noise high psrr low drop-out regulator with new dynamic compensation: A voltage regulator circuit has a first amplifier stage with input and output terminals, a feedback terminal, a pole-inducing transistor, and a compensating network coupled to the output terminal. A second amplifier stage has an input coupled to the first amplifier output, first and second current mirrors, and a pass...

20060170405 - Dc-dc converter and control circuit for dc-dc converter: A control circuit for a DC-DC converter that prevents erroneous operations during high ON-duty operation. In response to an H-level pulse signal, a random delay circuit generates a delayed pulse signal that rises to an H level within one cycle of the pulse signal. The random delay circuit randomly changes...

20060170406 - Hall element and manufacturing method thereof: An N-type epitaxial layer is formed on a p-type silicon substrate. Four N+ regions (diffusion regions used as electrodes) are formed in the N-type epitaxial layer. An insulation layer having a fixed depth is formed around each of the N+ regions on a principal surface of an epitaxial layer. The...

20060170407 - High-voltage regulator system compatible with low-voltage technologies and corresponding electronic circuit: A voltage regulator system is provided, which receives a first voltage and produces a regulated voltage. Such a device does not include any transistor supporting the first voltage, but does include transistors supporting at most a second voltage lower than the first voltage and includes division means, which include a...