Variable frequency dividing circuits

Details Variable frequency dividing circuits Variable frequency dividing circuits

1990-11-21

1993-02-09

Sikes, William L.

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

Systems

Pulse multiplication or division

377 39, H03K 2100

Patent

active

051857707

ABSTRACT:
A variable frequency dividing circuit according to this invention switches a frequency division ratio immediately after a neew frequency division ratio has been input, and then performs a frequency dividing operation without discarding already counted values. This frequency dividing circuit generates an error signal if a newly input frequency division ratio differs from the previous frequency division ratio and the already counted value is larger than the new frequency division ratio. Furthermore, the frequency dividing circuit performs forcibly a frequency division completion processing according to the consecutively input frequency signal.

REFERENCES:
patent: 3746891 (1973-07-01), Rowe
patent: 3924078 (1975-12-01), Bussey
patent: 4079234 (1978-03-01), Kashio
patent: 4704723 (1987-11-01), Markland
patent: 4805199 (1989-02-01), Muramatsu
patent: 4881040 (1989-11-01), Vaughn

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