Logical current switch

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307213, 307218, 307317A, H03K 1908, H03K 1912, H03K 1930, H03K 1934

Patent

active

041123140

ABSTRACT:
A logical current switch responsive to a plurality of input logical signals having predetermined voltage swings and including in a first circuit arrangement parallel-connected bipolar transistors responsive to the logical signal levels of the input signals, and including in a second circuit arrangement a single bipolar transistor responsive to a logical function of the input signals via Schottky barrier diodes. Each of the above arrangements being connected with a further ground-biased transistor and including a Schottky barrier diode for coupling the emitter of the input signal responsive bipolar transistor to the emitter of the ground-biased bipolar transistor so as to result in circuits for producing complementary output signal level swings of a magnitude equal to the input logical signal voltage level swings.

REFERENCES:
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patent: 3509362 (1970-04-01), Bartholomew
patent: 3573488 (1971-04-01), Beelitz
patent: 3716722 (1973-02-01), Bryant et al.
patent: 3742250 (1973-06-01), Kan
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patent: 3769524 (1973-10-01), Mathews
patent: 3806736 (1974-04-01), Wilhelm
Blumberg et al., "Self-biased, Low Voltage, Emitter-Followerless Current Switch", IBM Tech. Discl. Bull.; vol. 16, No. 3, p. 1017; 8/1973.
Chang, "Low Barrier SBD Pull-Down Driver Current Switch"; IBM Tech. Discl. Bull.; vol. 20, No. 2, pp. 601-602; 7/1977.
Dorler et al., "Integrated Schottky Diode and Transistor Circuit"; IBM Tech. Discl. Bull.; vol. 14, No. 11; pp. 3214-3215; 4/1972.
Culican, "Logic Block Coincident Circuit"; IBM Tech. Discl. Bull.; vol. 20, No. 1, pp. 174-175; 6/1977.

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