Programmable prescaler

Details Programmable prescaler Programmable prescaler

1983-06-06

1985-05-07

Heyman, John S.

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

Starting, stopping, presetting or resetting the counter

Counter chains with a radix or base other than the number...

377111, 377114, 377117, H03K 2136

Patent

active

045162514

ABSTRACT:
A prescaler circuit which provides an output signal which is synchronous with and proportional in frequency to a clock signal is provided. A counter portion counts a predetermined number of cycles of the clock signal and provides a plurality of count signals after a predetermined number of clock signal cycles. A decoder portion is coupled to the counter portion and couples a reference voltage node to a decoder output in response to both an input control signal and the count signals. A latch portion is coupled to the decoder portion for holding the decoder output, and a delay portion is utilized to provide the scaled output signal after a predetermined amount of time delay. The prescaler utilizes both odd and even scaling factors.

REFERENCES:
patent: 3287648 (1966-11-01), Poole
patent: 3657658 (1972-04-01), Kubo
patent: 4296380 (1981-10-01), Minakuchi
patent: 4360742 (1982-11-01), Freyman
patent: 4413350 (1983-11-01), Bond et al.

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