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7613442 |
Switch circuit and method of switching radio frequency signals
A novel RF switch circuit and method for switching RF signals is described. The RF switch circuit is fabricated in a silicon-on-insulator (SOI) technology. The RF switch includes pairs of switching...
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7612549 |
Low drop-out regulator with fast current limit
An LDO with fast current limit includes P-type transistor, an error amplifier, an adjustable reference voltage circuit for generating an adjustable reference voltage, and an N-type transistor. The...
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7609042 |
Controller for DC-DC converter and method for controlling DC-DC converter
A DC-DC converter that suppresses increase in area and obtains high conversion efficiency irrespective of the output current. A controller controls a first output transistor and a second output...
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7605572 |
Input current sensing AVP method for future VRM
A voltage converter provides a desired voltage droop with load while avoiding output current sensing and active control/feedback circuits and avoiding excessive power dissipation from passive...
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7598716 |
Low pass filter low drop-out voltage regulator
A low dropout voltage regulator is described having a pass device, differential amplifiers, and a feedback loop including a low pass filter. Two differential amplifiers arranged in parallel coupled...
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7583067 |
Variable power output regulator
Power control circuitry and method for controlling a variable output DC power source. The power control circuitry may include a first comparator to compare a signal representative of an output...
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7579815 |
Current controlling circuit arrangement and associated method for reducing crosstalk
A circuit arrangement and associated method for reducing crosstalk are disclosed. A load impedance is connected via a controlled current source to an input connection for supplying a supply voltage...
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7576523 |
Power supply circuit and semiconductor memory
A power supply circuit that outputs a set voltage from an output terminal, has a boosting circuit that boosts a voltage supplied from a power supply and outputs the voltage to the output terminal;...
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7567067 |
Power supply, display device, and light source driving apparatus
A power supply is provided, which includes a DC-DC converter being supplied with an external DC input voltage and a first switching control signal and outputting a duty sensing signal of which a...
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7567047 |
Electric motor control strategies for using a low resolution position sensor
An electric motor control strategy includes using a low resolution position sensor that provides a square wave output signal. The position sensor information is converted into sinusoidal...
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7564230 |
Voltage regulated power supply system
A voltage regulator for providing a regulated voltage is disclosed. The voltage regulator comprises an error amplifying module and a regulator. The error amplifying module provides a reference...
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7560915 |
Power supply apparatus provided with regulation function and boosting of a regulated voltage
A voltage comparator of a power supply apparatus detects overshoot by comparing an output voltage with a threshold voltage. The power supply apparatus is provided with three switches. Upon...
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7557556 |
Voltage control circuit
Provided is a voltage control circuit which suppresses a calorific value that generates when short-circuit fault occurs even if a voltage value of an input voltage is large. At the time of...
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7557549 |
Automatic output mode select for an actuator controller
Methods and systems are disclosed for automatically controlling the mode of an output that can be coupled to one of several types of actuators or the like. In one illustrative embodiment, an...
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7548044 |
Constant-voltage power circuit with fold back current limiting capability
A constant-voltage power circuit incorporating an over-current protection circuit having a fold back current limiting capability operative through low input voltages, and being capable of...
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7541794 |
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...
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7538992 |
System, device, and method for over-current relays protecting motors
A system, method, and device for protecting an induction motor are disclosed. The exemplary system may have a module for determining the current drawn by the motor and a module for determining the...
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7538528 |
Constant power foldback mechanism programmable to approximate safe operating area of pass device for providing connection to load
System and methodology for supplying power to a load using a pass device for connecting the load. A current limit circuit prevents current supplied to the load from exceeding a current threshold. A...
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7531995 |
Electronic device
An electronic device includes: a DC power source which supplies a first DC supply voltage; a DC voltage converter which is enabled or disabled in response to a first control signal, and which...
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7529532 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Switch circuit and method of switching radio frequency signals
A novel RF switch circuit and method for switching RF signals is described. The RF switch circuit is fabricated in a silicon-on-insulator (SOI) technology. The RF switch includes pairs of switching...
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7525294 |
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...
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7521912 |
Power supply apparatus
In a power supply apparatus for performing constant current driving of a light emitting diode which is a load circuit, a constant current circuit is disposed on a path for driving the load circuit....
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7521911 |
Switching power supply capable of always switching a switching element at an optimal timing
A control circuit has a delay correction circuit for correcting a delay involved for driving a switching element. The delay correction circuit has a reference voltage generating circuit for...
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7521909 |
Linear regulator and method therefor
In one embodiment, a linear regulator is formed with a variable miller compensation circuit that varies a zero of the linear regulator proportionally to a load current supplied by the regulator.
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7518347 |
Regulator circuit
A regulator circuit is provided which has a reference voltage outputting unit, a first operational amplifier, a voltage-dividing unit, and a second operational amplifier. The reference voltage...
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7508179 |
Dual input prioritized LDO regulator
An LDO regulator includes two linear regulator circuits and an internal priority logic scheme that favors generating a regulated output voltage using a regulated supply voltage over an unregulated...
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7508177 |
Method and circuit for reducing regulator output noise
A regulator circuit for reducing the output noise when regulators are switched includes a linear regulator and a switching regulator. The linear regulator generates a first regulator voltage from...
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7504809 |
Power supply and a device for providing a control voltage that is substantially equivalent to a reference voltage used by the power supply
In an embodiment of the present invention there is provided a device for providing a control voltage that is substantially equivalent to a reference voltage used by a power supply. The device...
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7498778 |
ORing circuit
A method and a circuit comprising an electrically controlled transistor element ( 303 ) configured for conveying a current from an input terminal ( 300 ) to an output terminal ( 320 ), wherein the...
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7466117 |
Multi-function voltage regulator
A multi-function voltage regulator for both DCDC function and LDO function includes a first transistor, a second transistor and a voltage control unit. The first transistor has a first terminal and...
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7463464 |
Method and apparatus for sensing brushless DC motor average current from overcurrent protection circuitry
A method and an apparatus that permit the measurement of the motor average current directly from the output of the amplifier and filter stage used for instantaneous dc-link overcurrent protection....
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7459891 |
Soft-start circuit and method for low-dropout voltage regulators
A low drop-out voltage regulator having soft-start. A low drop-out regulator circuit is provided having an input node, an output node, a power FET connected by a source and drain between the input...
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7456619 |
Power supply circuit
A power supply circuit includes a standard voltage generator, a regulator, a capacitor and a discharging circuit. The standard voltage generator is configured to generate a standard voltage. The...
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7453239 |
Charging apparatus having a switching element for controlling charging power
A charging device that may perform charging with larger current is provided. The charging device comprises a switching element for increasing or decreasing charging power, a PWM controlling circuit...
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7449872 |
Low-power programmable low-drop-out voltage regulator system
A low-power programmable low-drop-out voltage regulator system and methods are presented. The regulator includes a local reference generator circuit that receives a voltage input signal and outputs...
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7443702 |
High voltage start up circuit for power converters
A start up circuit for power converters is presented. It includes a JFET transistor, a resistive device, a first transistor, a second transistor and a diode. The JFET transistor is coupled to a...
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7439718 |
Apparatus and method for high speed voltage regulation
A high-speed voltage regulating apparatus and a method for high-speed voltage regulation. The apparatus includes: (A) a regulator, adapted to provide a regulated voltage; (B) switching circuitry,...
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7425812 |
Ramp rate closed-loop control (RRCC) for PC cooling fans
A fan controller may be integrated in silicon and may use an embedded microcontroller to implement a digital fan control algorithm. The microcontroller may continually monitor temperature and...
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7420357 |
Hysteretic DC/DC converter
A hysteretic DC/DC converter is proposed that operates at a high switching frequency without producing undesired pulse bursts at the output. The converter has a converter power stage with a supply...
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7414384 |
Series regulator circuit
A series regulator circuit that enables detection of a voltage drop and reduces consumed current in a static state. A constant current source, which is connected to a power supply voltage line, is...
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7411367 |
Full bridge circuit and DC motor capable of fixing output voltage and avoiding reverse current
A full bridge circuit includes a first switch, a second switch, a third switch, a fourth switch, a first controller, a second controller, a first operational amplifier, a first multiplexer, a...
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7402985 |
Dual path linear voltage regulator
A voltage regulator comprising two feedback loops for regulating a load voltage, where the first feedback loop comprises a pass transistor to source current to the load, and the second feedback...
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7402984 |
Oscillation sensor for linear regulation circuit
An oscillation sensor for a regulator that provides dynamic control of a connection/disconnection of a compensation capacitance. The compensation capacitor is disconnected under normal operation...
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7402970 |
Electric power steering device
The present invention includes a control part for controlling switching elements on diagonal lines in the upper and lower stage of an H bridge circuit respectively by different duty ratios based on...
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7400121 |
Soft-start system for voltage regulator and method of implementing soft-start
A system and method to provide a slow start up voltage, such as that can slowly ramp up or down by cyclically coupling a pair of associated energy storage devices, such as capacitors, during a...
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7391192 |
Apparatus and system for providing transient suppression power regulation
A device for providing power to suppress transient load demands and a system including the device are disclosed. The device includes a sense circuit to detect when a transient event occurs and one...
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7388342 |
System and method for controlling a motor using forced speed control
A system and method for operating a motor drive unit. The motor drive unit is coupled to a motor driving a load and is configured to selectively control the motor according to a torque control mode...
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7365524 |
Tip having active circuitry
A power supply system includes an adapter to receive power from a power source, and output a regulated output voltage (V out ). A tip receives V out from the adapter, and output V out to an...
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7323854 |
Zero cancellation in multiloop regulator control scheme
Control loops in a voltage regulator can be stabilized using minimal silicon area. A current limit signal, generated by a current limit control loop in the voltage regulator, can be divided to...
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7304458 |
Regulator circuit
A regulator circuit is offered to resolve a problem that an unnecessary operating current flows in a semiconductor integrated circuit in a low power consumption state. Channel width to channel...
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