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7012410 |
Regulating system
A regulating system comprises an input terminal for applying an input voltage, and an output terminal for providing an output voltage. A semiconductor element is connected between the input...
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7005834 |
Synchronous rectifier circuit and power supply
In a power supply of a synchronous rectification type, the self-turn on phenomenon of MOSFET is suppressed without increase of the drive loss to thereby improve the power efficiency. In a...
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7002329 |
Voltage regulator using two operational amplifiers in current consumption
A voltage regulator, which generates and outputs a given voltage based on a preset reference voltage, includes: a detection circuit part detecting the output voltage and generating and outputting a...
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6998824 |
Power supply circuit having a DC-DC conversion circuit and an intermediate node potential detection circuit
A power supply circuit includes a DC—DC conversion circuit including a high side transistor and a low side transistor connected in series between a power supply voltage and a reference potential...
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6989659 |
Low dropout voltage regulator using a depletion pass transistor
A linear low dropout voltage regulator is described that makes use of a depletion mode NMOS pass transistor and of a PMOS transistor in series to the NMOS transistor and connected to its drain. The...
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6989660 |
Circuit arrangement for voltage regulation
The invention specifies a circuit arrangement for voltage regulation in which, in addition to a control loop having a comparator ( 4 ), an output stage ( 3 ) and a feedback path, an auxiliary...
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6984949 |
System and method to selectively prevent movements of an electric vehicle
A method and system for preventing the movements of an electric vehicle in a direction opposite a desired direction are described herein. The electric vehicle comprises an electric motor linked to...
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6979980 |
Soft switching interleaved power converter
There is provided by this invention soft switching interleaved power converters that are suitable for high power and high voltage applications such as plasma processing. They have greatly reduced...
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6975522 |
Device and method for inhibiting power fluctuation
A power fluctuation inhibiting device for effectively inhibiting fluctuation of power supply voltage that is supplied to internal circuits. The inhibiting device includes a power fluctuation...
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6973337 |
Apparatus for the mobile communication device in low power consumption using LDO regulator with sleep mode
A mobile communications device ( 50 ) includes a plurality of LDOs ( 30 ) for supplying a stable voltage to various circuits on the device. In a normal mode, the LDO's main bandgap voltage source (...
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6969981 |
Voltage regulator power management apparatus
Quiescent currents in a circuit that includes a regulator are reduced by disabling selected portions of the circuit. A window comparator is selected activated to evaluate the input voltage such...
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6965218 |
Voltage regulator
A voltage regulator includes a two-stage feedback circuit for driving a controller formed by a transistor 10. The feedback circuit includes an error amplifier 30 and an output amplifier 20, a...
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6958596 |
Compensation sample and hold for voltage regulator amplifier
The problem of charge leakage in the AC compensation filter for the error amplifier of a pulse width modulation (PWM)-based DC—DC converter is effectively obviated by controllably sampling and...
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6933706 |
Method and circuit for optimizing power efficiency in a DC-DC converter
In one embodiment, a turn-on delay control structure ( 30 ) includes a sense FET device ( 31 ) that is coupled to a switch node ( 13 ) in a synchronous DC-DC converter ( 10 ). The DC-DC converter...
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6930526 |
Quasi-feedforward PWM modulator
Devices, circuits, and methods generate a substantially constant output voltage. A power storage element generates a DC output voltage from an input voltage. The output is sampled to generate a...
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6909265 |
Method, apparatus and system for predictive power regulation to a microelectronic circuit
A transient suppression system is configured for providing power regulation to a microelectronic device. A pre-adjust stage is configured to pre-charge or pre-discharge a bypass capacitor as driven...
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6897638 |
Stabilized power supply unit having a current limiting function
In a stabilized power supply unit having a current limiting function, the unit is designed to have a steep over-current dropping characteristic. This minimizes the over-current region, prevents...
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6897637 |
Low drop-out voltage regulator with power supply rejection boost circuit
A low drop-out voltage regulator uses a voltage subtractor circuit 36 to form a power supply rejection boost circuit. The voltage subtractor 36 is inserted between the pass element 20 and the...
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6894468 |
Control of DC/DC converters having synchronous rectifiers
A DC to DC power converter includes synchronous rectifiers which respond to a control waveform. Negative current from a load into the power converter is prevented by increasing the converter output...
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6885174 |
System for providing a regulated voltage to supply a load
The present invention relates to a system for providing a regulated voltage meant to supply a load, including a source for providing a substantially constant current approximately corresponding to...
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6867573 |
Temperature calibrated over-current protection circuit for linear voltage regulators
An apparatus and method provide for temperature calibrating an over-current limit in a linear regulator. Output current is delivered to the load through a power pass device that is responsive to a...
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6847198 |
Frequency sensing voltage regulator
A frequency sensing voltage regulator is disclosed. A source follower transistor has a gate connected to a predetermined gate voltage, a drain coupled to an external supply voltage through a...
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6838862 |
Pulse width modulator having reduced signal distortion at low duty cycles
A pulse width modulation apparatus includes a load circuit, a signal switch, a shunt switch, and a resistor. The signal switch isolates the load circuit from a voltage source along a signal path....
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6828764 |
Regulator circuit and control method thereof
A regulator circuit capable of accurately adjusting output voltage anywhere in a current region and maintaining optimum output voltage by correcting setting of a predetermined voltage to be...
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6822426 |
Regulator with feedback voltage and current signal summing into controller
A current control circuit forces current sharing among paralleled power converters. Each power converter has an associated current control circuit, which includes a current amplifier and a coupling...
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6809504 |
Dual loop regulator
A dual loop regulator is configured for improved regulation of a supply voltage for a dynamic load based on the magnitude of changes in the load voltage. An exemplary dual loop regulator comprises...
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6798178 |
Method of forming a power system and structure therefor
A power controller ( 10 ) of a power system switches between operating in a linear operational mode and a non-linear operational mode. The power controller ( 10 ) disables an output transistor ( 40...
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6798179 |
Stabilized direct-current power supply device
In a conventional stabilized direct-current power supply device with a soft starting function, soft starting is achieved by exploiting the rise in a reference voltage. Thus, soft starting is...
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6791303 |
Circuit configuration for voltage stabilization
A voltage stabilization circuit is configured between two signal lines. Each of the signal lines carries a signal, and an interference signal is superimposed on at least one of the signals. The...
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6791302 |
Methods and apparatus for open-loop enhanced control of power supply transients
A system is provided for supplying current to a dynamic load subject to transient current requirements. A sense unit coupled to the dynamic load is configured to sense the rate of change of supply...
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6788035 |
Serial bus control method and apparatus for a microelectronic power regulation system
A serial bus control method, apparatus, and system for transmitting signals between a master controller and a slave controller associated with a power regulator are disclosed. The serial bus...
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6784650 |
Circuit configuration for generating a controllable output voltage
A switching network with trimmable resistors lies in a control loop of a voltage generator that can be switched off from the supply voltage by a logic device. The logic device and also the...
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6744242 |
Four-state switched decoupling capacitor system for active power stabilizer
In a packaged integrated circuit, the package inductance limits the rate at which off-chip current may be varied in response to a change in on-chip current demand of the integrated circuit. The...
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6707280 |
Bidirectional voltage regulator sourcing and sinking current for line termination
A voltage regulator for providing a bidirectional current and a regulated voltage to a load. The voltage regulator regulates the output voltage at one half the level of the input voltage using a...
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6700361 |
Voltage regulator with a stabilization circuit for guaranteeing stabile operation
A voltage regulator is described, the output voltage of which depends on a drive to a transistor contained in the voltage regulator. The voltage regulator described is distinguished by the fact...
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6696822 |
Voltage regulator with a constant current circuit and additional current sourcing/sinking
A voltage regulator includes a constant current circuit which is connected between an input node with which a power supply voltage is supplied and an output node to which a load is connected and...
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6693410 |
Power sequencing and ramp rate control circuit
Power control circuits that control the power sequencing and ramp rate of voltages applied to integrated circuits are disclosed. In one embodiment, a power control circuit comprises a delay...
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6690146 |
High efficiency LED driver
Embodiments of the invention provide for circuits for driving LEDs with consistently good illumination and superior efficiency at lower cost and suitable for use with cheaper LEDs or with LEDs...
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6686728 |
Dropper-type DC stabilized power supply circuit provided with difference amplifiers for supplying a stable output voltage
A dropper-type DC stabilized power supply circuit is arranged such that a power transistor is connected in series with a power source line, a first difference amplifier compares (i) a feedback...
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6683442 |
Soft start of a switching power supply system
A synch FET power supply uses a plurality of electronic switches to periodically connect the primary of a transformer to a direct current input source of power to generate a time varying magnetic...
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6674273 |
Filtering circuit and battery protection circuit using same
This invention includes an improvement to a power regulation and thermal management circuit. The power regulation and thermal management circuit includes a pass element coupled serially between a...
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6667606 |
Power regulation and thermal management circuit
This invention provides a means of protecting power dissipating pass elements from exceeding their predetermined thermal limits. In one preferred embodiment, the circuit protects a pass element in...
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6667604 |
Power supply circuit with continued power generation after switch turn-off
A power supply circuit includes a constant voltage circuit and a timer circuit. The constant voltage circuit generates a constant voltage by regulating a base current of the first transistor via...
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6661212 |
Wideband regulator with fast transient suppression circuitry
A wideband voltage regulator is configured to provide suppression of fast transients, which can include a boosting circuit and a sensing circuit. The boosting circuit can be suitably configured to...
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6646495 |
Threshold voltage adjustment scheme for increased output swing
The present invention provides increased output swing by connecting a buffer backgate to an upper rail potential ( 125 ) during the no load current condition. This can be done through the use of a...
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6630817 |
Electrical circuit arrangement for converting an input voltage
An electrical circuit arrangement for converting an input voltage into an impressed electrical output variable, to convert the input voltage optionally into an output voltage or into an output...
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6611132 |
DC-DC converter, power supply circuit, method for controlling DC-DC converter, and method for controlling power supply circuit
A DC-DC converter for decreasing power consumption and quickly increasing an output voltage. The converter includes a voltage generation circuit, a switching control circuit, a current detection...
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6603292 |
LDO regulator having an adaptive zero frequency circuit
A low dropout voltage (LDO) regulator having an adaptive zero frequency circuit is described. The adaptive zero frequency circuit maintains the stability of the LDO regulator and improves the...
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6586916 |
Frequency sensing NMOS voltage regulator
A frequency sensing NMOS voltage regulator is disclosed. A NMOS source follower transistor has a gate connected to a predetermined gate voltage, a drain coupled to an external supply voltage...
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6573694 |
Stable low dropout, low impedance driver for linear regulators
A voltage regulator circuit that provides the current necessary to drive an output driver during transients and maintain low output impedance, while having a much better dropout voltage than a...
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