Timer circuit

Details Timer circuit Timer circuit

1990-03-09

1991-11-05

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072963, 377 20, H03K 17296, G04F 1500

Patent

active

050633554

ABSTRACT:
The timer circuit according to this invention has a first circuit block to which a source voltage is applied at all times and which includes a memory circuit which is set when an input signal is applied thereto. The timer circuit also has a reference voltage circuit which outputs a reference voltage when the memory circuit is set and which ceases to output the reference voltage when the memory circuit is reset, an oscillation circuit which outputs a train of pulse signals in a predetermined cycle, and a counter which begins to count the train of pulse signals after the reference voltage is outputted. The timer circuit further includes a second circuit block which includes a signal processing circuit which outputs a timer signal while the counter is counting. A reference voltage is supplied from the reference voltage circuit to the components of the second circuit block while the memory circuit remains set and the memory circuit is reset in response to a time-out signal from the counter.

REFERENCES:
patent: 3936745 (1976-02-01), Harrington
patent: 4052676 (1977-10-01), Crittenden
patent: 4545686 (1985-10-01), Ushikoshi
patent: 4745629 (1988-05-01), Essig et al.
patent: 4814905 (1989-03-01), Hashimoto
patent: 4968907 (1990-11-01), Pepper

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