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6490174 |
Electronic interface for power stealing circuit
An interface circuit cooperates with an existing power-stealing circuit designed for use with low voltage AC power. The existing power-stealing circuit provides low voltage DC power for operating...
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6489755 |
Active ripple and noise filter for telecommunication equipment powering
An active tracking filter reduces low frequency noise (such as a 20 Hz ringing signal) riding on a DC voltage (e.g., on the order of (−40 VDC) applied to a load such as a subscriber line...
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6489728 |
Power efficient LED driver quiescent current limiting circuit configuration
To prevent inadvertent illumination of a light emitting diode (or set of light emitting diodes) by stray currents at extremely low levels, a quiescent current limiting resistive load is connected...
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6479972 |
Voltage regulator for supplying power to internal circuits
A regulator for supplying the power of internal circuits, which makes the power of internal circuits independent of the voltage of the outlet power supply by using multi-stage method to control the...
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6472855 |
Voltage regulator circuit with transient generator to respond to load current changes and method therefor
A regulator circuit ( 10 ) includes an amplifier ( 61 ) having an input for sensing an output signal (V S , I LOAD ) of the regulator circuit and an output ( 13 ) for producing a transient signal...
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6473280 |
Switching voltage regulator failure detection circuit and method
A failure detection scheme for switching voltage regulators senses a parameter which normally transitions above and below a predetermined threshold during each clock cycle. A decision circuit...
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6469482 |
Inductive charge pump circuit for providing voltages useful for flash memory and other applications
A DC voltage boost circuit capable of improved efficiency. The DC voltage boost circuit includes an inductive element, a switching device, an output capacitive element, and a regulation circuit....
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6469481 |
Parallel RC current detection circuit and DC/DC converter with a parallel RC current detection circuit
An RC series circuit is provided in parallel with an inductor. The RC series circuit is comprised of a resistor and a capacitor which are connected with each other in series. A voltage across the...
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6469483 |
PWM control circuit for DC-DC converter
An error amplification circuit is configured by cascading together an operational amplification circuit and a proportional integration control circuit, both having a fixed operation point (ground...
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6465995 |
Switching power supply with AC waveform capability
A switching power supply which generates AC power, as opposed to DC power. A transistor opens and closes to thereby generate charge-discharge cycles through an inductor-resistor combination. Each...
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6462524 |
Floating buck regulator topology
Apparatus and method that provide for a Buck regulator with reduced open-switch voltage requirements. The buck regulator includes a transformer with a primary coil that is charged by an input...
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6462522 |
Transistor pattern for voltage regulator
A voltage regulator with an input terminal and an output terminal has a printed circuit board, a substrate mounted on the printed circuit board, and a first flip-chip type integrated circuit chip...
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6462523 |
Load-synchronous doppler charge pump with an integrated series-path regulator
Load-synchronous Doppler charge pump with an integrated series-path regulator A circuit for voltage raising for pulsed-operated loads is proposed. A capacitor CH is driven by a switching unit ( 2, ...
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6462521 |
High-speed charge-mode controller for a multi-phase switched-mode power converter
A multiphase controller for a PWM power converter employs a single current sense device to measure input current, I, and an integrator at each phase to accurately measure power delivered during a...
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6459248 |
Microelectronic current regulator
A circuit for providing regulated power to a microelectronic device is disclosed. The circuit includes an error amplifier, a transistor, and a supplemental voltage supply coupled to the transistor....
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6456050 |
Virtual frequency-controlled switching voltage regulator
A control voltage is generated as a function of on-time and off-time of a main regulator loop in response to apparent duty cycle of a voltage regulator circuit. Such control voltage is used in a...
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6456049 |
Power supply device and information processing apparatus providing a stable power supply
The present invention is a power supply device including a power input terminal which inputs a DC voltage, a DC/DC converter which has a feedback terminal and converts the input DC voltage from the...
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6452368 |
Circuit and method of operating a low-noise, on-demand regulator in switched or linear mode
A dual mode voltage converter ( 18 ) is provided which is capable of performing linear or switched modes of operation based on an external mode select signal presented to terminal (MODE). Pulse...
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6448749 |
Circuit configuration for regulating the power consumption of an integrated circuit
The present invention relates to an integrated circuit which is connected to a reference-ground potential and to a supply potential. Since differing activity in the integrated circuit results in a...
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6448750 |
Voltage regulator for non-volatile memory with large power supply rejection ration and minimal current drain
A regulator circuit to deliver a regulated boosted voltage VPP from a charge pump to electrodes of the cells of a non-volatile memory (NVM) array, such as an EPROM, integrated circuit device. The...
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6441679 |
Semiconductor active fuse operating at higher supply voltage employing current oscillation
A high-voltage semiconductor active fuse has first and second semiconductor elements, a comparator for comparing the voltages of the first and second semiconductor elements with each other, a...
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6441596 |
Switching regulator with reduced high-frequency noise
A switching regulator, by turning a switching device on and off, converts the level of a direct-current voltage fed in via an input terminal, and then feeds out the thus level-converted voltage via...
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6441597 |
Method and apparatus for sensing output inductor current in a DC-to-DC power converter
A current sense circuit for a DC-to-DC power converter accurately senses the output inductor current without adversely affecting efficiency of the power converter. The current sense circuit...
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6437549 |
Battery charger
A battery charger is provided that does not sink current from the battery during a reverse mode of operation. The battery charger includes upper and lower switching circuits, which alternately...
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6433524 |
Resistive bridge interface circuit
A resistive bridge interface circuit includes: (a) a pair of input power terminals; and (b) a resistive bridge circuit that includes a pair of parallel resistive branches coupled between the pair...
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6433523 |
Semiconductor integrated circuit and method for generating internal supply voltage
A system supply voltage, supplied from an external supply circuit, is lowered to generate an internal supply voltage for an internal circuit when the system supply voltage is higher than a...
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6430070 |
Synchronous PWM switching regulator system
A synchronous pulse width modulation (PWM) switching regulator that is suitable for high-performance CPUs. A DAC converts a plurality of inputted digital signal into analog signal that indicates...
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6429635 |
Drive circuit for insulated gate type FETs
A drive circuit for driving an FET includes a charge pump circuit which comprises multi-stage switching elements, condensers, and inversion buffers, and operates in response to the oscillatory...
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6429641 |
Power booster and current measuring unit
A power booster and current measuring circuit provides a quiet, accurate voltage to a load (such as a transistor during parametric testing) with a load current of up to 1 ampere, and can measure...
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6429634 |
Voltage boosting device, in particular for speeding power-up of multilevel nonvolatile memories
A voltage boosting device for speeding power-up of multilevel nonvolatile memories, including a voltage regulator and a charge pump and having an output terminal; the voltage regulator having a...
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6429632 |
Efficient CMOS DC-DC converters based on switched capacitor power supplies with inductive current limiters
A novel class of DC to DC power converters and a method of conversion is provided using high-frequency switched capacitors where the switches are implemented by CMOS transistors or diodes on an...
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6429633 |
Switching regulator and LSI system
In a switching regulator, switching noise is reduced with keeping high conversion efficiency. The switching regulator includes plural output switching transistors 21 through 23 having different...
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6426612 |
Circuit and method for sensing an over-current condition of a dual mode voltage converter
A current sense circuit ( 14 ) is provided which receives a signal indicative of output current flow of an up/down DC-DC converter during up-conversion and down-conversion modes. The current sense...
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6424129 |
Method and apparatus for accurately sensing output current in a DC-to-DC voltage converter
An apparatus and method for accurately sensing the output current delivered to a load by a buck-type DC-to-DC switched mode power converter corrects for thermal variation of the output inductor. A...
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6424130 |
Output voltage detecting circuit
An output voltage detecting circuit is added to a step-down DC-DC converter or a step-up DC-DC converter and is controlled so that an abnormally high increase in a regulated output voltage of the...
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6424131 |
Output controller
The object of the present invention is, in a power control device including an auxiliary circuit that is connected in parallel to an output circuit and controls an adjusting current smaller by a...
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6424133 |
Control voltage generator and method for generating control voltage having phase difference
A control voltage generator and a related method generate control voltages having a phase difference. The control voltage generator includes first thru N-th loads (where N is a positive integer no...
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6424132 |
Adding a laplace transform zero to a linear integrated circuit for frequency stability
A compensation circuit for introducing a zero in a first circuit being incorporated in a closed loop feedback system includes a first capacitor, an amplifier and a second capacitor, connected in...
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6420858 |
DC-to-DC converter circuit having a power saving mode
A DC-to-DC converter circuit having a power saving mode, and which achieves a high conversion efficiency without using a sense resistance. The DC-to-DC converter circuit includes a triangular wave...
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6420860 |
Power supply switching apparatus for facsimile machine
A power supply switching apparatus for a facsimile machine includes a power supply switch, a switch controller and a capacitor-based power supply. The power supply switch is configured to...
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6421257 |
Power converter control loop
An apparatus for and method of control of a switch ( 102 ) in an electrical power converter ( 100 ) using pulse width modulation to regulate output voltage ( 112 ) and current The method allows...
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6417653 |
DC-to-DC converter
Briefly, in accordance with one embodiment of the invention, a DC-to-DC converter includes: a circuit configuration to modify the set point of the output voltage signal level of the DC-to-DC...
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6414469 |
Current sensing and current sharing
An interleaved small-inductance buck voltage regulator (VRM) converter with the novel current sensing and sharing technology significantly improves transient response with size minimization....
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6411068 |
Self-oscillating switching regulator
A switching regulator connectable to a DC power supply includes a power switch coupled between a first node and an output node and having a control gate. An output voltage feedback circuit is...
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6407899 |
Fault detection in a redundant power converter
Aspects for detecting faults in a redundant power converter are described. In an exemplary circuit aspect, a circuit for sensing faults in a redundant power converter includes a first voltage level...
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RE37738 |
Simple and efficient switching regulator for fast transient loads such as microprocessors
A buck switching DC-to-DC regulator having a resistor and capacitor in combination across the storage inductor to measure output current and voltage. The resistor connects to the input of the...
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6404175 |
Multi-phase and multi-module power supplies with balanced current between phases and modules
A multi-phase power supply utilizes a current sensor including a sensor inductor winding connected in parallel with a filter inductor winding at the output of each phase for sensing the phase...
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6404174 |
Circuit for in-system programming of memory device
A programming circuit is coupled to an input/output pin of a device and is operative to generate a selected one of a plurality of electrical stimuli, such as a programming voltage, high and low...
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6393573 |
Power management for automotive multimedia system
A multimedia/personal computer-based system for operating information, communication, and entertainment devices in a mobile vehicle uses a power management strategy which reduces power consumption...
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6384584 |
Current control circuit
The PMOS transistor M 1 is controlled by a time constant circuit 2 having a second resistor R 2 and a capacitor C 1 which are provided between a collector of the PNP transistor Q 1 and the...
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