Accession Number : AD0851242

Title :   50 Ampere Turn-Off Switch.

Descriptive Note : Quarterly rept. no. 5, 15 Nov 68-15 Feb 69,

Corporate Author : WESTINGHOUSE ELECTRIC CORP YOUNGWOOD PA SEMICONDUCTOR DIV

Personal Author(s) : New, Thorndike C. ; Desmond, Timothy J.

Report Date : 15 FEB 1969

Pagination or Media Count : 22

Abstract : Gold doping of the GCS by diffusion is discussed. The typical gold doped device without additional gate inductance can now turn off 40A in less than the 5 microsec required in the contract. Using the slower GCS fabricated earlier, the dynamic turn-off characteristics were studied. An optimum timing of the junction recovery was shown to be possible with external gate circuitry and yielded the best turn-off conditions. Results of these and earlier studies have been incorporated into the breadboard switching tester. The test requirements are discussed and a pulse waveform for the test circuits is described. (Author)

Descriptors :   *ELECTRONIC SWITCHES, *TRANSIENTS, SILICON CONTROLLED RECTIFIERS, SILICON, GATES(CIRCUITS), DOPING, GOLD, MANUFACTURING.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE