Bipolar logic gate including circuitry to prevent turn-off and d

Details Bipolar logic gate including circuitry to prevent turn-off and d Bipolar logic gate including circuitry to prevent turn-off and d

1981-10-08

1983-11-15

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307300, 307456, 307458, 307563, H03K 1704, H03K 1762, H03K 19088, H03K 19084

Patent

active

044158173

ABSTRACT:
A logic circuit in which (1) a first bipolar transistor has a base, an emitter, and a collector coupled to a voltage/current source, and (2) a second bipolar transistor has a base coupled to the emitter of the first transistor, an emitter coupled to a constant voltage source, and a collector coupled to the voltage/current source contains operational control circuitry for preventing the second transistor from either turning off or normally going into deep saturation. Each transistor is typically an NPN device. The operational control circuitry may then comprise (1) first circuitry for providing current from the voltage/current source in a single current-flow direction to the collector of the second transistor and (2) second circuitry for providing current from the first circuitry in a single current-flow direction to the base of the second transistor. Optimally, the first circuitry prevents the second transistor from ever going into deep saturation.

REFERENCES:
patent: 3105159 (1963-09-01), Ditkofsky
patent: 3571616 (1971-03-01), Andrews
patent: 3614467 (1971-08-01), Tu
patent: 3631260 (1971-12-01), Yoshino
patent: 3699355 (1972-08-01), Madrazo et al.
patent: 3742250 (1973-06-01), Kan
patent: 3751680 (1973-08-01), Hodges
patent: 3962590 (1976-06-01), Kane et al.
patent: 3999080 (1976-12-01), Weathersby, Jr. et al.
patent: 4107547 (1978-08-01), Ishino

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