Matches 1 - 50 out of 270 1 2 3 4 5 6 >
Match Document Document Title
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...
7414867 Power conversion device  
An insulated gate bipolar transistor and a protective circuit are incorporated. The protective circuit has first and second Zener diodes connected in series in directions opposite to each other...
7394264 Device for non-dissipative measurement of the current in an inductor  
The invention relates to a device for measuring current in an inductor and being connected in parallel with said inductor. The device includes a network in parallel with the inductor and connected...
7394223 Over voltage and over current protection integrated circuit  
An integrated circuit is disclosed including a primary input for receiving an input voltage, a battery voltage input for receiving a battery voltage signal and an output for providing an output...
7385795 Cordless power tool with a protected weak link element  
A method consistent with an embodiment may include selecting one of a plurality of components of a power supply system of a cordless power tool to be a protected weak link element. The method may...
7362157 Circuit arrangement with a transistor having a reduced reverse current  
A circuit arrangement is disclosed herein having an input terminal configured to receive an input voltage, and an output terminal to provide an output voltage for a load. A first transistor with a...
7259951 Semiconductor device  
A semiconductor device comprises an output transistor for controlling current that flows between a first terminal and a second terminal, a detection transistor connected in parallel with the output...
7130169 Short circuit protection for a power isolation device and associated diode  
Short circuit protection is provided for an isolation component that has a parasitic diode as an inherent part of its construction. The isolation component may or may not be contained in an...
7091633 Current-limiting logic interface circuit  
A circuit of interface between a logic sensor and a logic input isolation barrier of a processing circuit, including an element of protection against input overvoltages, a current-limiting circuit...
7064946 Electronic fuse  
An electronic fuse comprising an integrated circuit having a control output terminal coupled to a control electrode of a power semiconductor switching device, the power semiconductor switching...
7061740 System and method for protecting an audio amplifier output stage power transistor  
A system and method for protecting an output transistor in an audio amplifier output stage includes a protection circuit that protects the output transistor from excessive currents and voltages,...
6980116 Method for failure detection in a radio frequency device  
A method for detecting a failure in a radio frequency (RF) device ( 200 ) that includes a transistor ( 210 ) having a first terminal at an RF input ( 220 ), a second terminal at an RF output ( 260...
6906574 Drive circuit for driving power semiconductor device  
A drive circuit includes a gate voltage detector that detects a gate-emitter voltage Vge that appears between the gate and emitter of a power semiconductor device throughout a detection time period...
6891705 Smart solid state relay  
An electrical system includes a solid state relay ( 1 ) and an electrical connector ( 2 ) that connects solid state relay ( 1 ) to a load ( 4 ). The solid state relay ( 1 ) includes a power MOSFET...
6870325 Led drive circuit and method  
An LED drive circuit is disclosed, comprising an electronic controller which is arranged to monitor LED current as a first input. The controller also receives a second input from a sensor...
6831328 Anode voltage sensor of a vertical power component and use for protecting against short circuits  
The invention concerns an anode voltage sensor of a vertical power component selected from the group consisting of components called thyristor, MOS, IGBT, PMCT, EST, BRT transistor, MOS thyristor,...
6816017 Power amplifier module  
A power amplifier module is provided with a function of protecting an amplifying device against destruction caused by a standing wave by reflection from an antenna end in load variation. Increase...
6804094 Ground fault circuit interrupter  
A ground fault circuit interrupter for use on a circuit having an AC power source electrically connected to a load circuit via hot and neutral lines. The ground fault circuit interrupter having at...
6784526 Integrated circuit device module  
According to the present invention, for a module in which a plurality of integrated circuit devices are mounted in parallel, the inductance generated by the unit length of a branched signal line on...
6781502 Method of forming a protection circuit and structure therefor  
A protection circuit ( 10 ) is formed to protected a load ( 11 ) when a short circuit develops during operation of the load ( 11 ). A load transistor ( 18 ) is formed to couple the load to a...
6717783 Short circuit power limiter  
The present invention provides a short circuit power limiter circuit having a current sensor and a power limiter. The short circuit sensor sends a short circuit flag signal to the power limiter...
6710698 Semiconductor fuse for electrical consumers  
A semiconductor fuse for electrical consumers ( 2 ) is disclosed, in which a semiconductor switch ( 3 ) is disposed between the battery ( 1 ) serving as a current- or voltage source and the...
6687106 Power module  
A power module including a self arc-extinguishing type semiconductor such as an IGBT and having a function to protect the semiconductor, i.e., to protect the IGBT against a short-circuit current....
6614637 Apparatus and method for a discharge interrupt circuit that can operate at a low supply voltage  
A discharge interrupt circuit and method is directed to short circuit protection for an electronic circuit that includes a load regulation device that is arranged to normally provide an output...
6587027 Solid state fuse  
A solid state fuse type protective circuit is provided in which a series MOSFET is connected in series with the load and its voltage source and a shunt MOSFET is connected in parallel with the...
6563725 Apparatus and method for control and driving BJT used as synchronous rectifier  
A bipolar junction transistor (BJT) used as a synchronous rectifier (SR) that is driven and controlled by an electronic circuit, such that when the collector-emitter voltage (VCE) is above an...
6529358 Driver protection circuit for preventing damage due to line contact with ground or supply voltage  
This circuit is inserted between a terminal (RGB) and a line (LI). The signal of the input terminal (RGB) is applied to the base of a bipolar amplifier transistor (T 2 ) mounted with a top load (LR...
6529355 Input protection circuit implementing a voltage limiter  
A circuit that protects a current shunt or any analog measuring circuit without the implementation of fuses. In a particular embodiment, a circuit comprises a current shunt and a plurality of...
6519127 Solid state safety relay  
A solid state safety relay comprises: a first driver circuit; a second driver circuit; a charge disconnect transistor coupled to the first driver circuit and configured to control the flow of...
6509721 Buck regulator with ability to handle rapid reduction of load current  
A buck converter has an input circuit for receiving an input signal, a controller connected to and controlling the input circuit, a switch controllable by the controller for switching on/off, a...
6445557 Method and apparatus for performing a short-circuit and overload disconnection with a semiconductor component  
A method for performing a short-circuit and overload disconnection with a semiconductor component includes the steps of providing a semiconductor component having a drain, a source and a gate. The...
6411529 Control for power plant  
A plant for transmitting electric power which employs a first combination of a turn off semiconductor and controllable semiconductor connected in antiparallel and a second combination of a turn off...
6400545 Fuseless dc-dc converter  
A fuseless DC-DC converter is provided to protect a circuit from overcurrent without involvement of a protective fuse. This is accomplished by providing a load circuit in the converter that...
6400163 Circuit arrangement for monitoring an electronic switch controlling a load  
In a circuit arrangement for monitoring an electronic switch provided for controlling a load and current flown through the load during turn-on intervals for driving the load, the switch has a...
6330143 Automatic over-current protection of transistors  
The present invention discloses a circuit and method for detecting a fault current in a circuit containing a power transistor. A comparator in communication with a parasitic inductance is utilized...
6285539 Switch driver  
In a switch driver, a pnp transistor turns ON or OFF the passage of the charging current. Resistors are commonly connected to a base of the pnp transistor. Npn transistors are provided in such a...
6278596 Active ground fault disconnect  
A circuit for detecting and automatically responding to ground faults. A passive protection PTC resistor is coupled in series with an active protection switch, the active protection switch being...
6271759 Controlling and monitoring an electrical system  
A system for controlling and monitoring operation of an electrical system is described. The system includes a fault protection device, for example, a circuit breaker, that is connected to the...
6205010 Switch circuit having protection function to interrupt input of control signal  
In an electric power switch circuit with an overcurrent or overheating protection function, unnecessary ON-OFF cycling is prevented. A MOSFET is used as an electric power element for energizing a...
6181541 Transistor-PTC circuit protection devices  
A circuit protection device for protecting an electrical load includes a three-terminal switch element such as a bipolar, or junction or metal-oxide-semiconductor field effect, transistor and a...
6178077 Electronic branch switching device  
The switching functions of switching a load on and off in normal operation and in fault operation are implemented in a simple manner in an electronic branch circuit switch, which is advantageously...
6175478 Short-circuit protection circuit, particularly for power transistors  
A short-circuit protection circuit, particularly for power transistors, contains a first circuit for mirroring the output current of a power transistor which is parallel-connected to the power...
6067219 Power cut-off device  
A power cut-off device comprises first and second electronic switching devices (FETs T2 and T1) which are cross-coupled so that when one switching device is on the other is off and vice versa, and...
6031702 Short circuit protected DC-DC converter using disconnect switching and method of protecting load against short circuits  
A four-terminal MOSFET, in which no combination of the source, drain, body and gate terminals are permanently connected together, is used as a synchronous rectifier capable of blocking an excessive...
6021037 Device including a thermally protected switching transistor  
A device (1) for supplying electric power to a load (4) connected to the device (1) in a power-on mode comprises a driver stage (7), a control unit (9), adapted to supply turn-on pulses to the...
6018263 Trigger circuit for a field-effect-controlled power semiconductor component  
A trigger circuit for a field-effect-controlled power semiconductor component has a controllable gate resistor for the power semiconductor component, which has low impedance in a normal situation...
6014303 Overcurrent preventing device  
An overcurrent prevention circuit which removes noise upon transmission of a signal over a signal line between two devices for which different power supplies are used and prevents overcurrent from...
5999388 Method and apparatus for limiting current in a direct voltage network of a power transmission system  
Apparatus and method for limiting current in a direct voltage network of a HVDC power distribution system. A direct voltage network is connected to an alternating voltage network through a...
5991175 Control circuit for an in-rush current control element, and a protection circuit and power supply employing the same  
For use with a protection circuit having an in-rush current control element that controls in-rush current into a power converter, a control circuit, a method of controlling the in-rush current...
5978194 Device and method for counting flanks of electrical pulses  
A device for counting the edges of electric pulses is disclosed and comprises a first capacitor connected in series with a pump circuit, which comprises a first resistance in series with a first...
Matches 1 - 50 out of 270 1 2 3 4 5 6 >