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8159805 |
Quick response mechanism and method for a switching power system
A quick response mechanism for a switching power system includes a detector and an adjustor connected to the detector. The detector is configured to directly monitor the drop of the output voltage...
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8145443 |
Fourier transform-based phasor estimation method and apparatus capable of eliminating influence of exponentially decaying DC offsets
Disclosed herein is a Fourier transform-based phasor estimation method and apparatus capable of eliminating the influence of exponentially decaying DC offsets. According to a Fourier...
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8139335 |
Protective circuit
A protective circuit for electrical connection to solar cells of a solar cell module is provided with a protective circuit that has a controlled electronic circuit arrangement. In this way, only...
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8102631 |
Computer power supply and standby voltage discharge circuit thereof
A computer power supply includes a standby voltage output terminal to output a standby voltage, a power connector connected to the standby voltage output terminal, and a standby voltage discharge...
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8059432 |
PWM controller having drive control with input voltage sensing and method therefor
In one embodiment, a PWM controller includes a circuit operably coupled to inhibit a drive signal responsively to a bulk input voltage remaining at a low value for a time interval and to re-enable...
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8054601 |
Power supply control apparatus having a function supplying power supply voltage
A microprocessor commonly receives at an A/D port the potentials of the power supplies output from a plurality of types of power supplies (a power supply for HDMI, a power supply for LSI, a power...
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8044634 |
Enhanced portable battery powered electrical appliance
An appliance, such as a flashlight, accepts first and second batteries. The appliance also includes an electrical load, such as a light source. A first circuit, such as a DC to DC converter,...
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8035938 |
Active current surge limiters
Active current surge limiters (100) and methods of use are disclosed. One exemplary system, among others, comprises a current limiter (140), including an interface configured to be connected...
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8031453 |
Industrial process field device with improved battery assembly
An industrial process field device is provided. The device includes wireless process field device electronics disposed within the industrial process field device and at least one battery cell...
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8031448 |
Input voltage clamp for a single-supply system
A system, apparatus and a method are described that provide a voltage clamp for a single-supply system. In particular, a negative voltage clamp prevents a negative over-voltage in a system having...
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8031449 |
Fast-responding short circuit protection system with self-reset for use in circuit supplied by DC power
A short circuit protection system includes an inductor, a switch, a voltage sensing circuit, and a controller. The switch and inductor are electrically coupled to be in series with one another. A...
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8022639 |
Dimming fluorescent ballast system with shutdown control circuit
A ballast system for, and a method of, controlling illumination of a lamp, include a dimmer switch having an actuator settable at different settings corresponding to different output voltages...
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8018702 |
Power supply abnormality detection circuit for on-vehicle electronic control device
The on-vehicle electronic control device includes a main power supply circuit fed with power from an on-vehicle battery through an output contact of a power supply relay and a main power supply...
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8000073 |
Current-mode under voltage lockout circuit
A current-mode under voltage lockout (UVLO) circuit provides an output signal that indicates to connected devices whether a connected power supply is sufficient (i.e., of sufficient strength and...
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7995317 |
Dual voltage hot swap module power control
A module hot swap circuit includes a low voltage-drop rectifier adapted to receive either positive or negative voltages of different absolute values. The rectifier is coupled to a power manager...
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7990672 |
Supervision circuit to detect very fast power supply drops
This invention is power supply protection for complex digital circuits employing an external high voltage supply and an internally generated low voltage core logic supply. Precision analog...
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7969046 |
Power supply control apparatus
The present invention is to provide a power supply control apparatus which can connect a ground to a suitable electric potential when the ground is disconnected. The power supply control apparatus...
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7961485 |
Method of forming a PWM controller and structure therefor
In one embodiment, a PWM controller is configured to inhibit forming a drive signal responsively to an overload sense signal having a value that is no greater than a first value for a first time...
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7957113 |
Undervoltage lockout circuit
An objective is to provide a highly-reliable undervoltage lockout circuit which can block and permit normal gate-driver output even when a supply voltage steeply increases. The undervoltage lockout...
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7948728 |
Semiconductor device and method for inspecting the same
A semiconductor device of the present invention includes: a power input terminal; an internal power supply circuit that converts a voltage supplied from the outside to the power input terminal into...
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7938548 |
Projection device
A projection device includes: a projector unit that has at least a light source and a projection optical system housed in a chassis; a control unit that is assembled with a chassis separate from...
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7932628 |
Control device with terminal 15—holding circuit
A terminal state of a terminal 15 of a vehicle is enabled to be maintained for a minimum period of time even after a drop in the voltage supply. At the same time other loads are to have no effect...
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7907377 |
Arrangement and method for an integrated protection for a power system
For protecting a power system, two or three of over current, thermal and under voltage protection circuits are integrated as one protection circuit but operate independently, and one or more...
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7907376 |
Load control device and method
A load control device includes a control circuit and a protection circuit. The control circuit controls driving of an electric load. The protection circuit monitors a power supply voltage supplied...
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7864497 |
Protective circuit
A protective circuit for electrical connection to solar cells of a solar cell module is provided with a protective circuit that has a controlled electronic circuit arrangement. In this way, only...
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7821754 |
Circuit arrangement for producing a defined output signal
A circuit arrangement for producing a defined output signal in CMOS integrated circuit is provided in which the output of a sensor signal conditioning circuit is connected to the drain terminal of...
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7804672 |
System and method for power good monitor for multiple information handling system power supplies
A switched power rail monitor compares voltages provided by a switched power rail and a power source to detect a predetermined differential indicative of a fault at the switched power rail. A...
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7800877 |
Method and electronic power supply device for supplying power to a low-voltage load protected by a protective device
The invention relates to an electronic power supply device, particularly a switched-mode power supply, for supplying power to a low-voltage load protected by a protective device, and to a method...
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7768247 |
Under voltage lock out circuit and method
An under voltage lock out circuit which monitors an input voltage and executes a predetermined sequence when the input voltage satisfies a predetermined condition may include a voltage comparison...
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7768756 |
Leakage current protection circuit
Systems and methods are provided for substantially mitigating leakage current. One embodiment includes an integrated circuit (IC). The IC comprises a monitoring circuit configured to control...
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7723961 |
MEMS based battery monitoring technical field
A battery protection and monitoring system includes a plurality of MAFET (Mechanically Actuated Field Effect Transistor) switches, wherein each MAFET switch among the MAFET switches is capable of...
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7671560 |
Method and apparatus for handling deeply discharged batteries in a mobile station
In one embodiment, the present invention includes a method for performing a test on a rechargeable battery to indirectly determine a state of protection circuitry associated with the battery. The...
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7663852 |
Output feedback and under-voltage detection system
A switched mode controller for properly handling an under-voltage condition in a power line which includes a current mirror for receiving current from the power line; a reference current source...
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7660089 |
Voltage rise suppression circuit and panel television
Included are a Zener diode D2 having a cathode connected onto a voltage output line, dividing resistors having one terminal connected to the anode of the Zener diode D2 and having the other...
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7633321 |
Driver circuit; electronic circuit having driver circuit and corresponding method
A driver circuit includes an output, at least one transistor including a load section coupled between the output and a supply voltage, and a circuit coupled to a control terminal of the at least...
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7619864 |
Regulator short-circuit protection circuit and method
A signal source generates a reference voltage, and a voltage regulator receives the reference voltage and generates an output voltage and current. During normal operation, a pass element in the...
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7605567 |
Battery protecting circuit and battery with such protecting circuit
A protecting circuit for a battery used to power an electronic system includes a control circuit and a sensing circuit. The sensing circuit includes a tri-axial accelerometer having X, Y and Z...
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7595969 |
Undervoltage warning method, undervoltage warning circuit and switching power supply
A method for identifying a cause for insufficiency of an output voltage reduced to or below an undervoltage set value comprises a first comparison step for comparing the output voltage to a fixed...
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7586292 |
Low voltage cutoff circuit for an electrochemical cell
The present invention is an electrical circuit that disconnects an electrochemical cell from a load when the cell's voltage descends to a predetermined value. The present invention is also...
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7535690 |
Arrangement and method for an integrated protection for a power system
For protecting a power system, two or three of over current, thermal and under voltage protection circuits are integrated as one protection circuit but operate independently, and one or more...
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7521984 |
Driving configuration of a switch
A driving circuit of a switch includes first and second transistors connected in series to each other and to relative intrinsic diodes in antiseries and driven by a driving device that includes at...
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7515393 |
Voltage regulator
According to one embodiment, a voltage regulator includes a switch configured to selectively conduct electrical energy according to a signal, and circuitry configured to provide the signal to...
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7508315 |
Signaling device and method of alerting a work machine operator to a predetermined condition using same
A signaling device includes an electrical circuit which discharges an electrical energy storage device through an electrically powered alert mechanism via a biased open transition switch upon...
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7486064 |
Under voltage lock out circuit and method
A voltage comparison unit compares a battery voltage with a predetermined threshold voltage, and outputs a comparison signal. A sequence circuit receives the comparison signal and a start-up signal...
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7471494 |
Output circuit
An output circuit for a circuit includes an input node coupled to the circuit, an output node, a reference potential terminal, a supply potential terminal, a semiconductor switch connected between...
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7468875 |
Plasma television and power supply control device
A microcomputer 60 takes in voltages output from the sustaining voltage Vsus generation circuit 52, the addressing voltage Vadd generation circuit 53, and the standby voltage generating circuit 54...
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7460348 |
Overload detector/enunciator
An overload detector/enunciator circuit. The overload detector/enunciator circuit detects an overloaded condition of a backup generator and provides a relatively immediate indication of the...
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7453290 |
Supply voltage removal detecting circuit, display device and method for removing latent image
A supply voltage removal detecting circuit, a display device and method for removing a latent image when a supply voltage is disconnected, in which the supply voltage removal detecting circuit...
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7450359 |
System and method for providing a temperature compensated under-voltage-lockout circuit
A system and a method are disclosed for providing a temperature compensated under-voltage-lockout circuit that has a trip point voltage that is not sensitive to temperature variation. The...
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7443641 |
DC-DC converter including short-circuit protection circuit
Provided is a DC-DC converter including a short-circuit protection circuit which can stably perform a reset operation and a stop operation. The short-circuit protection circuit includes a detection...
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