Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Utilizing three or more electrode solid-state device
Patent
1996-04-01
1997-12-30
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Utilizing three or more electrode solid-state device
327463, 327475, 327481, 327327, H03K 1772, H03K 1764
Patent
active
057035202
ABSTRACT:
A transient suppressor comprises a self-triggered silicon control rectifier (SCR) that forms a drive circuit for an NPN power transistor. The SCR and the NPN power transistor are combined, along with other elements, into an integrated circuit (IC) by a junction isolated BiCMOS process. The SCR self-triggers upon being subjected to an inductive flyback condition created by an inductive load and renders the NPN transistor conductive, thereby allowing the NPN power transistor, having a relatively large semiconductor region, to effectively snub the current created by the negative feedback condition. The transient suppressor may be used in either a high-side or low-side driver arrangement and the SCR/NPN power transistor combination may further be combined with load driving and other circuitry on a single integrated circuit. The IC is designed to perform normally when subjected to transient conditions and further when there exists a potential voltage differential between the circuit ground and the load ground of at least 2 volts.
REFERENCES:
patent: 3725683 (1973-04-01), Andersen
patent: 3878551 (1975-04-01), Callahan, Jr.
patent: 3932769 (1976-01-01), Pollmeier
patent: 4015143 (1977-03-01), Tokunaga et al.
patent: 4153909 (1979-05-01), Dobkin
patent: 4432032 (1984-02-01), Baker et al.
patent: 4774420 (1988-09-01), Sutton
patent: 5606278 (1997-02-01), Palara
Dikeman John Mark
Gose Mark Wendell
Callahan Timothy P.
Delco Electronics Corporation
Englund Terry L.
Funke Jimmy L.
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