Clock generator with an automatic frequency change function

Details Clock generator with an automatic frequency change function Clock generator with an automatic frequency change function

1993-03-08

1995-12-12

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327 99, 327292, H03K 300

Patent

active

054753244

ABSTRACT:
If, in a clock generator according to the present invention, the first clock is switched to the second clock with a lower frequency, the frequency count circuit counts the frequency of the second clock with using the first clock as reference. The clock switching control means judges whether the frequency of the second clock is stable or not based on the count result from said frequency count circuit and, if it is stable, switches the switching means for clock switching to the second clock.

REFERENCES:
patent: 3271588 (1966-09-01), Minc
patent: 3708686 (1973-01-01), Britle et al.
patent: 4686386 (1987-08-01), Tadao
patent: 4816776 (1989-03-01), Kessler
patent: 4949052 (1990-08-01), Chigira
patent: 5086387 (1992-02-01), Arroyo et al.
patent: 5227672 (1993-07-01), Sawtell
patent: 5231389 (1993-07-01), Yamauchi

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