Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1977-02-10
1978-12-26
James, Andrew J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
357 23, 357 34, 357 35, 357 43, 361 57, 307205, H01L 2702
Patent
active
041319087
ABSTRACT:
A safeguarded integrated circuit includes two supply electrodes, an output electrode and an input electrode. Between two of the electrodes there is provided a protection circuit having a lateral bipolar transistor, the emitter and collector zones of which are connected respectively to the said electrodes. The bipolar transistor is provided in a region which is surrounded by the substrate which region serves as a base zone and has a conductivity type opposite to that of the substrate. A connection contact connected to the emitter is provided on this region and a modulatable resistance is formed between the connection contact and the active base zone by the region.
REFERENCES:
patent: 3628070 (1971-12-01), Heuner
patent: 3636385 (1972-01-01), Koepp
patent: 3673428 (1972-06-01), Athanas
patent: 3739238 (1973-06-01), Hara
patent: 3764864 (1973-10-01), Okumura et al.
patent: 3821780 (1974-06-01), Harland et al.
patent: 3918080 (1975-11-01), Kerr
patent: 3967295 (1976-06-01), Stewart
Daub Dirk
Klaver Olof E. H.
Biren Steven R.
Briody Thomas A.
James Andrew J.
U.S. Philips Corporation
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