Current injection type logical operation circuit arrangement inc

Details Current injection type logical operation circuit arrangement inc Current injection type logical operation circuit arrangement inc

1982-07-28

1985-07-23

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072383, 307442, 307477, 307247A, 365229, H03K 19003, H03K 19091

Patent

active

045310653

ABSTRACT:
A I.sup.2 L circuit device including logical operation circuits comprising I.sup.2 L elements, wherein when main power supply is interrupted, an injector current is injected from an auxiliary current source circuit into part of the I.sup.2 L circuit device to thereby hold a logical value, so that when the main power supply is restored, the logical state having been prevailing prior to the interruption of the main power supply is restored. When applied to a drive circuit for a switch including a self-restore type contact, for example, this I.sup.2 L circuit device is operative such that the switch is set to a predetermined logical value; the logical value is stored in a storage circuit of the I.sup.2 L circuit device; and when the main power supply is interrupted, an injector current is injected from the auxiliary current source circuit into the storage circuit to thereby hold the stored logical value so that when the main power supply is restored, the logical value having been prevailing prior to the interruption of the main power supply is also restored.

REFERENCES:
patent: 3562555 (1971-02-01), Ahrons
patent: 4085341 (1978-04-01), Reinert
patent: 4209710 (1980-06-01), Quarton
patent: 4227257 (1980-10-01), Sato
patent: 4422163 (1983-12-01), Oldenkamp
patent: 4438353 (1984-03-01), Sano et al.
patent: 4449206 (1984-05-01), Tokitsu et al.
Winslow, "Battery Back-Up Power Supply", IBM Tech. Discl. Bull.; vol. 23, No. 3, pp. 1240-1241, 8/1980.

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