Digital frequency divider

Details Digital frequency divider Digital frequency divider

1988-12-12

1991-02-05

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Systems

Counter includes circuit for performing an arithmetic function

377 48, 364703, H03K 2348

Patent

active

049911880

ABSTRACT:
A digital frequency divider capable of providing output pulses of frequency f.sub.out related by Y/X to the frequency of the input pulses f.sub.in, where X and Y are positive whole numbers and O<Y/X.ltoreq.1. The circuit is particularly suited for high frequency digital applications. The X and Y values may be fixed or individually variable. Truncation errors decrease with time to provide a best estimate output frequency. In a preferred arrangement, iterative summations of residual and incremental values are latched and recycled as feedback in synchronism with the rate of the input frequency.

REFERENCES:
patent: 3657658 (1972-04-01), Kubo
patent: 3976946 (1976-08-01), Schroder
patent: 4031476 (1977-06-01), Goldberg
patent: 4318046 (1982-03-01), Sonntag
patent: 4374427 (1983-02-01), Katayama
IBM-Tech Bul. vol. 24, No. 8, Jan. 1982, "Fractional Frequency Division Clock Circuit", by Miller et al., pp. 4103-4104.

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