Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1980-12-30
1983-10-11
Anagnos, Larry N.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307455, 307475, H03K 1716, H03K 19092
Patent
active
044094981
ABSTRACT:
A current controlled gate performing a NOR function utilizes a pair of transistors acting as current mirrors that receive a DC bias through a large resistor. This bias occurs when an input transistor is positive to insure that one of the current mirror transistors will saturate when the input transistors are "off" and the other will be driven into saturation when either of the input transistors is "on". When all inputs are negative, one of the current mirror transistors saturates thereby reducing the current to the input transistors effectively to zero. The saturation results in the collector-base capacitance increasing very rapidly such that the input assumes the characteristics of a common emitter due to the large capacitance existing in the collector of the current mirror transistor. An active push-pull output is produced with a single collector path from input to output.
REFERENCES:
patent: 3501647 (1970-03-01), Di Giacomo
patent: 3590274 (1971-06-01), Marley
patent: 3660679 (1972-05-01), Ishigaki et al.
patent: 4039867 (1977-08-01), Blumberg et al.
patent: 4112314 (1978-09-01), Gani et al.
patent: 4145621 (1979-03-01), Colaco
patent: 4308469 (1981-12-01), Cavaliere et al.
"Current Switch Logic Circuit", by T. Cole et al, IBM Tech. Disc. Bull., vol. 14, No. 1, Jun. 1971, pp. 336-337.
Dorler Jack A.
Mosley Joseph M.
Anagnos Larry N.
Hudspeth David R.
International Business Machines - Corporation
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