Transistor-transistor-logic circuits having improved breakdown p

Details Transistor-transistor-logic circuits having improved breakdown p Transistor-transistor-logic circuits having improved breakdown p

1981-07-10

1983-11-01

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307300, 307443, H03K 3013, H03K 1716, H03K 19088, H03K 1920

Patent

active

044131950

ABSTRACT:
A transistor-transistor-logic circuit includes a discharge circuit coupled between the base of an output transistor and a reference potential. The discharge circuit includes a transistor whose base and collector terminals are resistively coupled to the base of the output transistor and whose collector terminal is resistively coupled to a reference potential. The emitter of the transistor is also coupled to the reference potential. The transistor in the discharge circuit appears as a finite impedance when the output transistor is on and provides a path for discharging the base-emitter charge storage while the output transistor is turned off. The resistor coupled between the collector of the bypass transistor and the reference potential provides a large but finite impedance path for leakage current in said output transistor. This prevents the output transistor from being turned on by the leakage current.

REFERENCES:
patent: 3073969 (1963-01-01), Skillen
patent: 3555294 (1971-01-01), Treadway
patent: 4045689 (1977-08-01), Tietz
patent: 4131808 (1978-12-01), Kuo
patent: 4132906 (1979-01-01), Allen
patent: 4330723 (1982-05-01), Griffith

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