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8860428 Apparatus and method for recognizing an error in a power bridge circuit  
An apparatus and a method for recognizing an error in a power bridge circuit containing a load, a high-side branch and a low-side branch. Accordingly, a first switched current source is connected...
8674631 Power conversion apparatus and method of controlling capacitor voltage of power conversion apparatus  
A power conversion apparatus includes: a line breaker that is connected in series to a direct-current power supply; a first capacitor that is connected in parallel to the direct-current power...
8494178 Avoiding audio feedback  
Methods and techniques to implement a digital signal processor for avoidance of audio feedback are disclosed, in particular, audio signal processing systems that reduce the requirement for...
8314697 Electric system and alarm device thereof  
An alarm device includes a first detecting unit and a controlling unit. The first detecting unit has an isolating circuit, a first enabling circuit, a second enabling circuit and an output...
8284535 Backup tripping function for a circuit breaker with microcontroller-based fault detection  
A circuit breaker capable of microcontroller-based fault detection having a backup circuit for causing the circuit to trip in response to a microcontroller fault or a failure of a regulated power...
8279571 Electrical power switching with efficient switch protection  
A transmission delay line is introduced between the switch and the power output side of a power switching system so that sparking of the load is hidden from the switch by the time delay of the...
8203197 Thermally enhanced semiconductor devices  
Thermal communication of matched transistors formed in lower electrical resistance subregions of first and second active substrate regions is provided by thermally conductive members formed to...
8203312 Battery pack and control method  
A battery pack includes at least one secondary battery, a fuse, and a control section. The fuse is configured to cut off charge or discharge current of the secondary battery upon detection of an...
8194377 Driver and over-current protection circuit therein  
An over-current protection circuit includes a voltage generating unit and a comparing unit. The voltage generating unit is configured for receiving a first voltage and generating a reference...
8159801 Switched hot swap controller  
The invention describes an electric circuit (100), a method and a computer program for hot-swapping an electronic board in a telecommunication system, where the increase in current in the electric...
8134253 Load driving circuit, integrated circuit, DC-DC converter, and load driving method  
A load driving circuit (20) according to the present invention, for carrying out PWM control to cause currents of respective light emitting diode lines (3-1 . . . 3-N) connected in parallel, each...
8116050 Semiconductor integrated circuit  
To provide a semiconductor integrated circuit including: a detection circuit that detects an occurrence of latch up and can be configured while adopting a layout configuration that suppresses the...
8116056 Low voltage startup timer for a microcontroller-based circuit breaker  
A circuit breaker capable of microcontroller-based fault detection having a backup circuit for causing the circuit breaker to trip in response to a microcontroller fault, including a timing...
8072726 Radiation-tolerant inrush limiter  
A radiation-tolerant inrush limiter is provided. The inrush limiter does not incorporate radiation-hardened parts, but instead uses an ordinary (non-hardened) p-channel FET to provide switching...
8054605 Power supply controller  
A gate driver 28 performs a normal charging operation for a power MOSFET 14 by driving a charge pump 90 solely, when a low-level control signal S1 (ON signal) is received during a normal state. On...
8018703 Auxiliary device and data transmission method, auxiliary unit and electrical circuit breaker comprising said device  
An auxiliary device for remote data transmission having processing means comprising a first input to receive a first data item of a state of the circuit breaker, and at least one command output to...
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...
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...
7885049 Electrical power switching with efficient switch protection  
A transmission delay line is introduced between the switch and the power output side of a power switching system so that sparking of the load is hidden from the switch by the time delay of the...
7663457 Magnetic latch for a voice coil actuator  
Magnetically latching and releasing a voice coil actuator for controlling electrical switchgear. The voice coil actuator includes a voice coil magnet disposed on a common longitudinal axis with...
7652858 Protection for permanent magnet motor control circuits  
Methods and apparatus are provided for protecting a motor control circuit in a permanent magnet electric motor system. The permanent magnet electric motor system includes a permanent magnet...
7504743 Power supply control device for on-vehicle electrical loads  
A power supply control device for on-vehicle electric loads is proposed, the control device being capable of detecting breakages at a plurality of electrical loads, a positive side wiring thereof,...
7489490 Current limiting MOSFET structure for solid state relays  
A current-limiting circuit for limiting rising of a current above a predetermined level. The circuit including forward- and reverse-conducting devices, each device including a MOS and a bipolar...
7446507 Overcurrent detection method and detection circuit  
In a load-driving apparatus with a FET between a battery and a load, an overcurrent detection circuit has a function generation circuit with a voltage divider circuit and a comparator. The voltage...
7359171 Current limiting circuit and output circuit including the same  
A current limiting circuit capable of increasing a range of applicable load values is disclosed. An output circuit (100) may include a current limiting circuit. A current limiting circuit may...
7330343 Current-limiting protection circuit for a power supply  
The present invention discloses a current-limiting protection circuit for a power supply, which applies to a power supply that has a maximum power-limiting function, wherein the user will be...
7327543 Method and device for switching a semi-conductor circuit breaker  
The invention relates to a method for switching a semi-conductor circuit breaker by means of which the resistance of the breaker gap of the semi-conductor circuit breaker is controlled by a...
7259950 Load-protection control circuit of power supply  
A load-protection control circuit of a power supply, which applies to the power supply that has a maximum power-limiting function. The power supply includes a power transformation circuit which...
7161782 Intelligent fuse box for the power distribution system of a vehicle  
The present invention relates to intelligent fuse box (1) for a vehicle's multiplex power distribution system, the fuse box including outputs (3) for driving the vehicle's functional...
7116160 Booster  
A booster includes a boosting circuit and a feedback control circuit. The boosting circuit is used to boost an input voltage into a predetermined output voltage; the feedback control circuit...
6760202 Electrical coil module, an electrical coil comprising such modules, and actuation mechanism including such a coil and a circuit breaker comprising such an actuation mechanism  
An electrical coil module of planar type manufactured by printed circuit techniques on a generally flat substrate (21) has a first layout (20) of conducing material constituting a first electrical...
6696708 Electrostatic discharge protection apparatus  
The present invention reveals an electrostatic discharge protection apparatus including a silicon controlled rectifier, a triggering voltage adapter network and a holding voltage adapter network....
6624994 Apparatus and method for over-current protection of an analog switch  
A multiple over current protection circuit for regulating current through an analog switch coupled between a power supply and a load. In a first circuit, a comparator monitors a voltage drop...
6594131 Over current protection circuit of semiconductor switching device  
In an over current protection circuit of a semiconductor switching device, a change in a main current of a semiconductor switching device with respect to a change in the detected voltage of the...
6331687 Control method and device for a switchgear actuator  
A current interrupter (4) includes a current interrupting device (4) having at least one movable contact (71); an actuator (8) coupled to the movable contact (71) of the current interrupter (4); a...
6208175 Circuit arrangement for the evaluating a binary signal defined by current threshold values  
A circuit arrangement for evaluating a binary signal defined by two current thresholds, particularly the output signal of an active sensor [(1')], comprises a current source...
6137668 Power switch with overload protection  
An overload protection circuit for a power switch has a delay element by means of which the voltage which is dropped across the power switch, the supply voltage and a temperature margin are...
6055149 Current limited, thermally protected, power device  
A thermally protected power device is disclosed and includes a semiconductor package having at least five pins. One of the pins comprises a ground pin for connecting to a ground connection, and...
6016245 Voltage overshoot protection circuit  
A voltage overshoot protection circuit includes an integration circuit configuration. The integration circuit configuration is included in the voltage overshoot protection circuit so as to...
6011416 Switch circuit having excess-current detection function  
A microcomputer 4 responds to an instruction signal to turn the load L on or off to control the FET 2 through the drive circuit 5. The microcomputer 4 samples an electric current IL which is...
5969926 Short circuit protection arrangement for an output buffer of an integrated circuit  
The current flowing in an output field effect transistor is sensed by a parallel circuit arrangement which derives a sensed current representing the current flowing in the output transistor. The...
5943205 Driver and overload protection circuit  
Driver and overload protection circuit for an electrical switch means. Switching control pulses with a minimum edge duration are fed to a two stage comparator circuit having first, lower and...
5825602 Overcurrent trip device  
An overcurrent trip device includes a capacitor 13 that stores power for driving a trip electromagnet 7, and a charging current generating means 18 that starts charging the capacitor 13 upon...
5812353 Current limiter for electrical transmission/distribution protection systems  
A current limiter arrangement particularly adapted to be positioned at a substation of an electrical power system for limiting the fault current for a predetermined period of time to permit...
5793596 Floating positive circuit breaker  
A circuit breaker IC adapted for controlling an external NMOS switch coupled between a supply voltage and a load referenced to ground, with the circuit breaker being isolated from ground. With...
5751051 Semiconductor device equipped with electrostatic breakdown protection circuit  
A semiconductor device has a semiconductor chip which is divided into a plurality of separate regions. In each of these regions, there are provided a plurality of common discharge lines which are...
5737170 Thermal shutdown circuit using a pair of scaled transistors  
The base of a thermal shutdown bipolar transistor having a VBE(on) which decreases with increasing temperature is biased with a bias voltage VPTATbias which increases proportionally with...
5737169 Intrinsic element sensing integrated SOA protection for power MOSFET switches  
A protective circuit for a power field effect transistor, e.g., a power MOSFET, employs a diode-switched pickup circuit, a threshold detector, and a timer. The pickup circuit includes a resistor...
5726900 Ground detection circuit for a three wire power supply  
A three wire power supply circuit is provided comprising a circuit for monitoring the integrity of the ground connection of the power supply circuit. A circuit element is provided in the...
5687049 Method and circuit for protecting power circuits against short circuit and over current faults  
A fault protection circuit for protecting IGBT's and other non-latching semiconductor devices in power circuits, for example, power converting/inverting circuits, against phase to phase, phase to...

Matches 1 - 50 out of 293 1 2 3 4 5 6 >