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| Number | Title | Issue Date |
| 7616046 | System comprising an electrical bridge for generating an electrical signal for a load and a control unit for such a system A System for generating a PWM output voltage signal include a first half bridge having a first set of switches, and a second half bridge having a second set of switches. A control unit is configured to generate a first PWM switch-signal for switching the first set o... | 11/10/2009 |
| 7612602 | Resonant gate drive circuits A resonate gate drive circuit for driving at least one power switching devices recovers energy loss for charging and discharging the input capacitance of the power switching devices. The gate drive circuit charging and discharging the gate capacitor with a high leve... | 11/03/2009 |
| 7598792 | Resonant gate drive circuits A resonate gate drive circuit for driving at least one power switching device recovers energy loss for charging and discharging the gate capacitance of the power switching devices. The gate drive circuit uses a current source to charge and discharge the gate capacit... | 10/06/2009 |
| 7358791 | Discharge protection circuit A discharge protection circuit for discharging a full-bridge circuit in a brushless DC fan, wherein the brushless DC fan comprises a control circuit outputting at least one first control signal and at least one second control signal to the full-bridge circuit. The s... | 04/15/2008 |
| 7307266 | Method and apparatus for an optically clocked optoelectronic track and hold device A method and apparatus for optically clocked optoelectronic track and hold (“OCOETH”) device. The OCOETH device includes a diode bridge, input node, at least two current sources and at least two photodetectors. The input node is operatively coupled to the diode ... | 12/11/2007 |
| 7279953 | Current switch and method of driving the same A method and apparatus for driving a current switch with a differential drive signal monitors both the temperature of the switch and the current through the switch. The method and apparatus dynamically control the amplitude of the drive signal as a function of the s... | 10/09/2007 |
| 7265603 | MOSFET gate driver with a negative gate bias voltage A circuit for preventing shoot-through in a high side switching transistor coupled in series with a low side switching transistor across a supply voltage, the circuit comprising a voltage reference circuit having an output providing a reference voltage which is nega... | 09/04/2007 |
| 7245170 | Attenuator and portable telephone terminal apparatus using the same Provided are: at least one or more series variable resistors implemented by field effect transistors connected to a signal line A; and at least one or more shunt variable resistors implemented by field effect transistors connected between a signal outputting section... | 07/17/2007 |
| 7183834 | Method and apparatus for driving a power MOS device as a synchronous rectifier A synchronous rectifier comprising a MOSFET device, and a gate driver for driving the gate of the MOSFET device, the MOSFET device comprising first and second MOSFET transistors coupled with their drain-source paths in parallel to receive an alternating current wave... | 02/27/2007 |
| 7171234 | High-frequency switch circuit A high-frequency switch circuit is provided for switching a connection between a common transmission circuit and antenna side circuit in a plurality of transmitting and receiving systems. The high-frequency switch includes a connection between the antenna side circu... | 01/30/2007 |
| 7132876 | System for discharging electronic circuitry An electronic discharge circuit. The discharge circuit includes a first current source having first current source input and output and a current control circuit having first, second, third, and fourth control contacts. An electronic circuit element of an electronic... | 11/07/2006 |
| 7129695 | Electrical test circuit with an active-load and an output sampling capability An electrical test circuit includes a bridge configuration having two paths between two nodes, a buffer, and a capacitor. An output of the buffer is coupled to one of the paths, the buffer is adapted to either provide a defined potential or a high impedance, the cap... | 10/31/2006 |
| 7130655 | High-frequency switch circuit A high-frequency switch circuit is provided for switching a connection between a common transmission circuit and an antenna side circuit in a plurality of transmitting and receiving systems. The high-frequency switch includes a connection between the antenna side ci... | 10/31/2006 |
| 7102405 | Pulse-width modulation circuit and switching amplifier using the same A pulse-width modulation circuit converts an input signal into a pulse signal to be supplied to a switch amplifying circuit. The modulation circuit includes a comparison signal generator, an amplitude controller for modulating a comparison signal from the signal gen... | 09/05/2006 |
| 7034582 | Electronic circuits A high voltage AC power supply circuit for a capacitive load CL, such as an electroluminescent lamp, includes a low voltage DC supply, an inductor L and a FET S in series. The FET S can be pulsed so that the inductor L generates a voltage to charge the ca... | 04/25/2006 |
| 6995496 | Electrical power extraction from mechanical disturbances A method of extracting power includes coupling a transducer that converts mechanical power to electrical power to a disturbance; coupling an electrical circuit to the transducer such that a peak voltage experienced by the transducer is greater than two times higher ... | 02/07/2006 |
| 6861893 | Circuit arrangement for a current-controlled resistor having an enlarged linear range The invention relates to a circuit arrangement for a current-controlled resistor having an enlarged linear range, using an arrangement of non-linear bipolar load elements wherein the resistance is generated between a first terminal (E) and a second terminal (F), hav... | 03/01/2005 |
| 6753717 | H-bridge driver An H-bridge driver has a drive signal generating circuit for generating a square-wave signal as a drive signal. The H-bridge driver also has a waveform shaping circuit for blunting the waveform of the drive signal at the rising and trailing edges thereof. The wavefo... | 06/22/2004 |
| 6518822 | High-frequency switch In a high frequency switch, first and second diodes are respectively connected between first and second ports and between first and third ports so that they are directed in the same direction with respect to the first port. Coupling capacitors are connect... | 02/11/2003 |
| 6501666 | Method and apparatus for magnetic amplifier to reduce minimum load requirement This invention provides a method and apparatus for magnetic amplifier to reduce the minimum load requirement of power supply. The apparatus comprises a voltage-dropper and a current-limiter. Through the voltage-dropper and the current-limiter, the master ... | 12/31/2002 |
| 6373790 | Overcharge prevention method, changing circuit, electronic device and timepiece In an overcharge prevention method for a voltage storage element connected to a bridge rectifier circuit which includes a first switching section connected between one input terminal supplied with an AC voltage and a first power source line, a second swit... | 04/16/2002 |
| 6275092 | Active damping circuit An active damping circuit damps the ringing effect caused by a write circuit for a disk drive. The circuit includes upper switches and lower switched current sources. A capacitive feedback is connected between the output and the lower switched current sou... | 08/14/2001 |
| 6252440 | Write-driver circuit In a write driver circuit for switching the direction of a write current passing through a magnetic head or the like having an inductance component, an H-shaped bridge circuit is formed by using four NPN transistors in order to switch the write current at... | 06/26/2001 |
| 6211723 | Programmable load circuit for use in automatic test equipment A programmable load circuit operable to generate a plurality of test signals is described. The programmable load circuit comprises a diode bridge coupled between an input and an output. The diode bridge compares the voltage on the input to the voltage on ... | 04/03/2001 |
| 5912578 | Multiplexer circuit having diode bridge switches An array of electrical elements is arranged in rows and columns, signals being read out from the column conductors. Each column has a multiplexer switch so that signals from a number of columns may be switched to a common output. Each multiplexer switch c... | 06/15/1999 |
| 5900767 | Electronic devices comprising an array A large-area electronic device comprises an array (1) of device elements (2,3) coupled to row and column conductors (A and B). The column conductors (B) are arranged in groups, (e.g M, M+1, M+2), and a column multiplexer circuit (C) couples the column con... | 05/04/1999 |
| 5870031 | Full-wave rectifier and method of operation for a recognition system A full-wave rectifier circuit (70) includes a first transistor (N1) and a second transistor (N2) in combination to form a first transistor pair (N1 and N2) for minimizing the voltage drop between ground (88) and the transponder substrates. A third transis... | 02/09/1999 |
| 5781059 | Driver circuit for semiconductor test system A driver circuit for a semiconductor test system generates test signals having predetermined voltage levels without being affected by stray capacitances. The driver circuit includes: a buffer amplifier for supplying test signals having predetermined volta... | 07/14/1998 |
| 5745003 | Driver circuits for IC tester A multi-level driver circuit comprises: (a) an output buffer; (b) a first switch for applying a first analog level to the output buffer when in a closed state; (c) a second switch for applying a second analog level to the output buffer when in a closed st... | 04/28/1998 |
| 5572154 | Circuit and method of sampling an analog signal A sample circuit (10) maintains linear operation over frequency. A switchable diode bridge (12) passes the analog input signal when enabled to one terminal of a sample storage capacitor (14). The second terminal of the capacitor is coupled through a close... | 11/05/1996 |
| 5434528 | Gate drive using continuous alternating power and a diode H-bridge A gate drive circuit for a power switching device having first and second power terminals and a gate terminal comprises an H-bridge rectifier having first, second, third, and fourth rectifiers, the anodes of the first and second rectifiers being mutually ... | 07/18/1995 |
| 5434522 | Frequency doubler circuit having a diode quad with a grounded port A microwave frequency doubler circuit, which includes a full wave rectifier for rectifying an input signal and to provide two outputs, and a differential amplifier having inputs connected to the two outputs.... | 07/18/1995 |
| 5412332 | Drive circuit for a flyback converter with switching transistors in bridge arrangement A flyback converter including a first (6) and a second (8) switching transistor, a first (10) and a second (12) rectifier diode, and a primary winding (14) of a transformer, which parts are connected in a bridge arrangement. The first switching transistor... | 05/02/1995 |
| 5315169 | Power-efficient sample and hold circuit using bipolar transistors of single conductivity type A diode bridge includes a plurality of diodes for coupling an input voltage signal to a holding capacitor for sampling when the diodes are forward biased, and uncoupling the voltage signal from the capacitor for holding when the diodes are reverse biased.... | 05/24/1994 |
| 5313113 | Sample and hold circuit with full signal modulation compensation using bipolar transistors of single conductivity type A diode bridge (12) includes a plurality of diodes (D1,D2,D3,D4) for coupling an input voltage signal (Vin) through a resistor (RH) to a holding capacitor (CH) for sampling when the diodes (D1,D2,D3,D4) are forward biased, and uncoupling the voltage signa... | 05/17/1994 |
| 5276355 | Change-over circuit for tester implemented by using diode-bridge type analog switches A change-over circuit for use in a tester for changing over a load and a driver to be connected to a device under test is implemented by using diode-bridge type analog switches which include a first diode-bridge type analog switch connected as collector l... | 01/04/1994 |
| 5276369 | Sense amplifier circuit having a bias current control means A sense amplifier circuit characterized by comprising differential amplifying means for amplifying and outputting supplied differential input signals, and bias current control means, connected between the differential amplifying means and a ground voltage... | 01/04/1994 |
| 5264798 | Autonulling AC bridge using differential and integration feedback A self-contained autonulling bridge circuit based on phase-sensitive deteon of an impedance to be measured is described. The system utilizes a feedback structure to control a variable impedance in order to establish the null of the bridge. The system uti... | 11/23/1993 |
| 5243235 | Sample-and-hold circuit A sample-and-hold circuit comprising a diode circuit including four diodes connected in series, an input circuit connected to a first node of the first and third diodes and a second node of the second and fourth diodes, first and second output terminals c... | 09/07/1993 |
| 5235224 | Current detecting circuit using pulse transformer A detecting circuit is provided with at least one transformer, in which a first transformer is connected at its primary winding to an input power source and has two windings at its output portion to control the operation of two transistors respectively mo... | 08/10/1993 |
