Logic circuit having a selectable output mode

Details Logic circuit having a selectable output mode Logic circuit having a selectable output mode

1979-08-13

1982-07-13

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307456, 307458, 307300, 307299B, H03K 19003, H03K 19013, H03K 19088

Patent

active

043396763

ABSTRACT:
An improved logic circuit is disclosed, having an improved disable circuit for disabling the logic circuit at a substantially reduced current level. A modified form of the disable circuit enables the logic circuit to operate either in a three-state mode or in an open-collector mode, as desired. A dynamic Miller shunt is also disclosed for rapidly forcing the active drive device into the non-conducting state each time the phase splitter device assumes the non-conducting state. In addition, an active Miller shunt is disclosed for maintaining the active drive device in the non-conducting state whenever the logic circuit is disabled.

REFERENCES:
patent: 3736572 (1973-05-01), Tu
patent: 3980898 (1976-09-01), Priel
patent: 3999080 (1976-12-01), Weathersby, Jr. et al.
patent: 4081695 (1978-03-01), Allen et al.
patent: 4194132 (1980-03-01), Mrazek
patent: 4255670 (1981-03-01), Griffith
patent: 4287433 (1981-09-01), Goodspeed
Mrazek, "Characteristics and Applications of Tri-State IC's", National Semiconductor Corp. (pub.), 7/1971, 11 pages.

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