Master/slave clock arrangement for providing reliable clock sign

Details Master/slave clock arrangement for providing reliable clock sign Master/slave clock arrangement for providing reliable clock sign

1976-04-30

1977-05-24

Kominski, John

Oscillators

Plural oscillators

Synchronized, triggered or pulsed

307219, 328 61, 331 56, H03B 306

Patent

active

040258742

ABSTRACT:
The outputs of two like frequency oscillators are combined to form a single reliable clock signal, with one oscillator functioning as a slave under the control of the other to achieve phase coincidence when the master is operative and in a free-running mode when the master is inoperative so that failure of either oscillator produces no effect on the clock signal.

REFERENCES:
patent: 3116477 (1963-12-01), Bradbury
patent: 3265987 (1966-08-01), Hahnel
patent: 3289097 (1966-11-01), Martin
patent: 3293562 (1966-12-01), Hahnel
patent: 3431510 (1969-03-01), Reis et al.
patent: 3479603 (1969-11-01), Overstreet, Jr.
patent: 3599111 (1971-08-01), Butler, Jr.
patent: 3619661 (1971-11-01), Butler, Jr.
patent: 3662277 (1972-05-01), White
patent: 3751685 (1973-08-01), Jaeger
patent: 3769607 (1973-10-01), Thelen
patent: 3795872 (1974-03-01), Napolitano et al.
patent: 3965432 (1976-06-01), Denenberg et al.
IBM Tech. Disc. Bul. "Redundancy Technique for Crystal Oscillators" Duke et al., vol. 12, No. 1, June 1969, p. 147.

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