Arakawa Noriaki, Isii Makoto: Drive control apparatus for air conditioner.. Hitachi, January 7, 1993: EP0521467-A2 (50 worldwide citation)

The drive control apparatus (45) for controlling a motor (2) to drive the compressor (3) of an air conditioner, according to this invention, includes a rectifying circuit (6, 14) for converting an AC voltage into a DC voltage, an inverter (5) including a combination of a plurality of power controlli ...

Takeshi Kanda: Matrix switcher apparatus for selectively outputting information signals in response to control signals in the form of various communication protocols. Sony Corporation, Peter C Toto, Jerry A Miller, June 25, 1996: US05530434 (36 worldwide citation)

A matrix switcher apparatus for selectively outputting information signals includes a first matrix switcher unit for selectively outputting an information signal according to control signals in the form of a first communication protocol, and a second matrix switcher unit for selectively outputting a ...

Yagi K Tokyo Res Lab Mitsubish, Zenba K Tokyo Res Lab Mitsubis, Sekiguchi Y Tokyo Re Lab Misub, Ishikawa Fumio Sony Coorporati, Yamamoto Tetsuo Sony Corporati, Aoki Takayuki Sony Corporation: Light-emitting diode drive circuit.. Mitsubishi Rayon Co, Sony, August 21, 1991: EP0441965-A1 (33 worldwide citation)

A light-emitting diode drive circuit comprising a current feeding circuit (3) having a first (16) which receives at the base thereof a first drive pulse signal (S3) sent from a signal receiving circuit, and a second transistor (15) of which the collector is connected to a light-emitting diode (2), o ...


Hoffmann David C: Electronic power supply.. Hoffmann David C, Shenoy Suratkal P, November 4, 1987: EP0244186-A2 (14 worldwide citation)

An uninterruptible power supply includes removable individual power modules (10), which for example may be 10 kilowatts each and are removable from the overall system without adversely affecting the remaining modules. Each module (10) by means of pulse width modulated switching converts the line AC ...

Bird Philip Harvey: Driving a semiconductor device.. Philips Electronics, Philips, December 14, 1988: EP0294887-A2 (13 worldwide citation)

An arrangement for driving a semiconductor device (1) has an input (12) for receiving a control signal and a control output (11) for connection to the control electrode (9) of a power semiconductor device (1) which is connected in series with a load (5) across a power supply (3,6). The arrangement i ...

Wen Jai Hsieh, Chi Song Horng, Chun Chiu Daniel Wong, Gerchih Chou, Shrikant Sathe: Apparatus for programmable signal switching. I Cube, Smith Hill and Bedell, January 20, 1998: US05710550 (12 worldwide citation)

A field programmable interconnect device (FPID) selectively routes signals between signal ports in response to commands from a host controller. Each command includes an address and data. The FPID includes an array of switch cells, each interconnecting a separate pair of the ports and each having fir ...

Peterson Lisa Ann, Siegel Stefan Allen: High-speed driver for an led communication system or the like.. American Telephone & Telegraph, May 19, 1993: EP0542480-A2 (11 worldwide citation)

A high-speed driver (1) for an LED (4) includes a differentiator (3) for providing a turn-on (I) and a turn-off (I) pulse of current to the LED. The amount of charge delivered during turn-off is adjusted to sweep substantially all of the carriers from the LED without reverse-biasing the LED.

Hebenstreit Ernst Dipl Ing: Switch comprising a mis-fet operated as a source follower.. Siemens, November 18, 1981: EP0039952-A1 (10 worldwide citation)

Die Anmeldung bezieht sich auf einen Schalter mit einem als Source-Folger betriebenen MIS-FET. Bei als Source-Folgern betriebenen MIS-FET-Schaltern wird ein "Bootstrap"-Kondensator verwendet. Bei Anlegen einer Steuerspannung lädt dieser Kondensator (14) die Gate-Source-Kapazität (10) des FET (2) auf ...

Improvements in and relating to semiconductor switching circuits. Gould Advance, February 4, 1981: GB2053606-A (10 worldwide citation)

A semiconductor switching circuit is arranged to switch current from a power source 30 through a load 31 in response to switching control signals applied to first and second semiconductor switching devices, such as transistors 32, 33. The first and second transistors are connected in series and the ...