Gated back-clamped transistor switching circuit

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

H - Electricity

03

K

328/196

H03K 17/04 (2006.01) H03K 17/0422 (2006.01)

Patent

CA 1125871

(U.S. 944,562) ABSTRACT OF THE DISCLOSURE The output transistor of a switching circuit is driven into saturation for obtaining fast turnon thereof, and maintained in satura- tion 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.

333463

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