Power-on initializing circuit for a calculator system

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307 87, 307293, 307297, 328 62, H03K 112, H03K 5153

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active

039506541

ABSTRACT:
An initializing circuit for automatically providing a pulse of a duration sufficient to initialize all the relevant storage elements in an electronic calculator computing system having one or two power supplies. It comprises a power-on pulse generator controlled by two phase clock buffers utilizing a feed-back loop including a bit of delay to guarantee a minimum of one bit time duration for the power-on level. The two phase clock buffers are activated at turn-on to remain in a steady state by a power-on level detecting sub-circuit to control the pulse generator. When a one bit pulse is insufficient to initialize the system, a flip-flop and a counter may be used to generate a longer pulse.

REFERENCES:
patent: 3218473 (1965-11-01), Madsen
patent: 3732442 (1973-05-01), Husbands
hanchett, "Turn-on" Reset Circuits, RCA Technical Notes No. 927, Mar. 1973.

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