Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1976-09-22
1977-09-20
James, Andrew J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
361103, 357 38, 357 39, 307305, 307310, 307252B, 323 22SC, 73362SC, H01L 2356, H01L 2966, H01L 2974, H01L 29747
Patent
active
040500837
ABSTRACT:
A monolithic semiconductor device is disclosed comprising a power switching thyristor and a temperature sensitive thyristor integrated on a common substrate. In preferred form, the temperature sensitive thyristor is electrically connected between the gate terminal and one of the main terminals of the power switching thyristor, and is thermally actuatable to intrinsically switch from a high to a low resistance state above a predetermined temperature of the power switching thyristor sensed through the common substrate, whereby to shunt gate current and automatically inhibit turn-on of the power switching thyristor to prevent overheating thereof. Depending on circuit variations, the power switching thyristor may be rendered conductive above or below a predetermined temperature, or within a defined temperature range. Normally off and normally on devices are disclosed.
REFERENCES:
patent: 3564293 (1971-02-01), Mungenast
patent: 3600650 (1971-08-01), Obenhaus
patent: 3609457 (1971-09-01), Squiers
patent: 3622849 (1971-11-01), Kelly
patent: 3708720 (1973-01-01), Whitney et al.
patent: 3846674 (1974-11-01), McNulty
patent: 3920955 (1975-11-01), Nakata
patent: 3959621 (1976-05-01), Nakata
patent: 3962692 (1976-06-01), Murphy et al.
patent: 3971056 (1976-07-01), Jaskolski et al.
Jaskolski Stanley V.
Lade Robert W.
Schutten Herman P.
Spellman Gordon B.
Autio William A.
Cutler-Hammer, Inc.
James Andrew J.
Rather Hugh R.
Taken Michael E.
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