Dual-mode timer circuit

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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Details

307602, 328 78, H03K 1728, H03K 5159

Patent

active

046201190

ABSTRACT:
A dual mode timer circuit has first and second two-input NOR gates with inputs connected to receive a trigger pulse and outputs respectively coupled to first and second RC charging networks. An output NOR gate has its two inputs connected to the RC charging networks respectively, and its output connected to an output terminal. A control input voltage signal is coupled to a fourth NOR gate whose output is connected to control activation of the second RC charging network which has a shorter time constant than the first RC network. The output signal duration is dependent upon which RC network is effective. The output terminal is connected to the other inputs of the first and second NOR gates to render the circuit independent of trigger pulse duration.

REFERENCES:
patent: 3060329 (1962-10-01), Harrison et al.
patent: 3673434 (1972-06-01), McIntosh
patent: 3976893 (1976-08-01), Banfi
patent: 4047058 (1977-09-01), Green

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