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| Number | Title | Issue Date |
| 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 circuit powered by a power supply and a microcontroller. The timing circuit ... | 02/14/2012 |
| 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 transmission line. This makes it possible to detect the load spark and ac... | 02/08/2011 |
| 7372684 | Power supply device A power supply device has a pulse width control circuit for controlling voltage converting operation of a voltage converting circuit by changing a pulse width. A momentary interruption detecting circuit detects a change in an output voltage when the output voltage s... | 05/13/2008 |
| 7369385 | Overload limiting circuit An overload current limiting circuit includes an output control circuit responsive to a logic input signal for generating a control signal for driving an output device to produce at an output terminal a signal representative of the logic input signal; and a sense ci... | 05/06/2008 |
| 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 include a voltage detecting circuit (1) and a voltage clampi... | 04/15/2008 |
| 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 alarmed by a time-delay alarm circuit of the current-limiting protection ci... | 02/12/2008 |
| 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 control voltage (Vst), such that the power loss (Pist) from the circuit brea... | 02/05/2008 |
| 7301742 | Method and apparatus for accessing and activating accessory functions of electronic circuit breakers An electronic trip unit for a circuit breaker includes a programmed microprocessor and a module plug in removable signal communication with the microprocessor. The module plug includes a program identifier. The microprocessor recognizes the program identifier and ac... | 11/27/2007 |
| 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 outputs a direct current to drive loads and a control circuit which can ... | 08/21/2007 |
| 7239495 | Output circuit with transistor overcurrent protection When the overcurrent detection circuit detects that a voltage drop of the output transistor exceeds a threshold value, it turns on the switch by the first operational amplifier. In the shut-down signal generation circuit, the capacitor is charged with a charge curre... | 07/03/2007 |
| 7216064 | Method and apparatus for programmable thermal sensor for an integrated circuit A programmable thermal sensor is implemented in an integrated circuit such as a microprocessor. The programmable thermal sensor monitors the temperature of the integrated circuit, and generates an output to indicate that the temperature of the integrated circuit has... | 05/08/2007 |
| 7203046 | Overcurrent detecting device An overcurrent detecting device for detecting an overcurrent in a load circuit, includes a DC power supply, a load, a semiconductor switch that controls ON/OFF of the load, a driver circuit that outputs a driving signal to the semiconductor switch, a reference volta... | 04/10/2007 |
| 7187134 | Method of triggering at least one illuminating means and triggering circuit for practicing such method A system and method for illuminating a light source, particularly a vehicle light source. The light source receives a voltage signal causing the light source to be illuminated. A triggering circuit detects the voltage signal. If the voltage signal is at or below a p... | 03/06/2007 |
| 7176804 | Protection of power semiconductor components A method and a system for protecting the power semiconductor components used in the powerstages of power electronics devices, such as frequency converters, wherein calculation modeling the degree of heating of the semiconductor junction of the power components (V... | 02/13/2007 |
| 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 components/actuators and/or cable buses (11–13) equipped wit... | 01/09/2007 |
| 7158359 | Circuit configuration having a semiconductor switch and a protection circuit A circuit configuration has a first semiconductor switch and a first protection circuit. The protection circuit has a second semiconductor switch whose load path is connected between a control terminal and a load path terminal of the first semiconductor switch. The ... | 01/02/2007 |
| 7133272 | Solid-state replacement for locomotive relay A solid-state direct replacement relay assembly, and a method for installing and using it to replace the mechanical-style relays in the electrical cabinets of a locomotive. Solid-state relay components are substituted to upgrade locomotive relay systems, and to impr... | 11/07/2006 |
| 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 detects the output voltage of the boosting circuit and stops boosting the v... | 10/03/2006 |
| 7110272 | Inverter bridge controller implementing short-circuit protection scheme A fault handling system for short circuit recovery in three-phase multiple-level inverter bridges, used to drive inductive loads, which waits for either desaturation of switches or expiration of a delay period based upon an amount of time before saturated switches a... | 09/19/2006 |
| 7072160 | Monitoring device for power supplies A monitoring or watchdog unit (UWE) for a current or voltage supply system, wherein a supply voltage is taken across at least one cut-out safeguard to two or more outputs, the at-least one cut-out safeguard device configured as a controlled switch device and the wat... | 07/04/2006 |
| 7038415 | Motor driving device A temperature sensor (33) detects the temperature of a MOS transistor (7), and a current detecting circuit (35) detects current flowing in the MOS transistor (7). When the voltage corresponding to the detected temperature or the voltage c... | 05/02/2006 |
| 7031129 | Protection circuit A protection circuit, to be provided for a circuit arrangement having an inductive load and an FET as an N-channel MOS transistor provided upstream of the load with respect to a flow of power current, the FET controlling an energization state of the load, the protec... | 04/18/2006 |
| 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), and a third terminal at an RF common (230 | 12/27/2005 |
| 6977487 | Vehicular alternator failure determination apparatus using commutating device voltage A vehicular alternator failure determination apparatus is capable of making a failure determination accurately. The apparatus includes a maximum voltage detection part (1) for detecting a maximum voltage of an alternator commutating device which commutates an... | 12/20/2005 |
| 6960899 | Apparatus for discharging a combination battery consisting of a plurality of secondary batteries A discharging circuit, connected to both terminals of a lithium battery, includes a first discharge resistor, a second discharge resistor, and a transistor for occasionally discharging the lithium battery to reduce the SOC difference among respective lithium batteri... | 11/01/2005 |
| 6927988 | Method and apparatus for measuring fault diagnostics on insulated gate bipolar transistor converter circuits A method for diagnosing faults using a load. In the method IGBTs are controlled such that certain currents are expected. If the currents are not as expected, a fault may be diagnosed. ... | 08/09/2005 |
| 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 during which a sampler allows the process of detecting the gate-emit... | 06/14/2005 |
| 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 conductor having an input terminal (23), arrange... | 07/06/2004 |
| 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. Additionally, the triggering voltage adapter network and th... | 02/24/2004 |
| 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 across the analog switch. When the voltage drop exceeds a refere... | 09/23/2003 |
| 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 resistor for current detection connected to the current detec... | 07/15/2003 |
| 6362943 | Active current limiter An active current limiter controls the flow of current between a power source and a load. The active current limiter includes a power switch coupled between the power source an the load, a current sensor coupled between the power source and the load to se... | 03/26/2002 |
| 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 feedback sensor (14) for monitoring movement of the actuat... | 12/18/2001 |
| 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 [(IQ'_,IQ11,IQ12,IQ13)] that can consist of indi... | 03/27/2001 |
| 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 evaluated in comparison with a maximum permissible depletion laye... | 10/24/2000 |
| 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 another one of the five pins comprises a power pin for connec... | 04/25/2000 |
| 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 integrate excess diverted current drawn from a bus. The voltage ov... | 01/18/2000 |
| 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 supplied through the A/D converter 6 and which flows ... | 01/04/2000 |
| 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 parallel circuit arrangement comprises series-connected CMOS... | 10/19/1999 |
| 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 second, higher comparator threshold values. When the lower compa... | 08/24/1999 |
