Gated back-clamped transistor switching circuit

Details Gated back-clamped transistor switching circuit Gated back-clamped transistor switching circuit

1978-09-21

1981-01-20

Chatmon, Jr., Saxfield

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307237, 307280, 307319, H03K 333, H03K 1908, H03K 1760, H03K 2330

Patent

active

042465010

ABSTRACT:
The output transistor of a switching circuit is driven into saturation for obtaining fast turnon thereof, and maintained in saturation during a substantial portion of its period of operation, for obtaining minimum power dissipation thereof relative to its unsaturated state. A short time before turning off the output transistor, a diode is connected across its base and collector electrodes, for diverting some of the base current from the base electrode into the collector electrode thereof, thereby causing the transistor to come out of saturation, reducing the accumulated charge in the base region thereof, permitting faster turnoff of the transistor relative to its saturated state.

REFERENCES:
patent: B530285 (1976-04-01), Sakamoto et al.
patent: 3010031 (1961-11-01), Baker
patent: 3083303 (1963-03-01), Knowles et al.
patent: 3160765 (1964-12-01), Krossa
patent: 3534281 (1970-10-01), Hillhouse
patent: 4109166 (1978-08-01), Clark, Jr. et al.
patent: 4118640 (1978-10-01), Ochi et al.
patent: 4123670 (1978-10-01), Pollmeier

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