Switchable divider

Details Switchable divider Switchable divider

1978-04-13

1980-04-29

Heyman, John S.

328 48, 328 49, H03K 2136

Patent

active

042008425

ABSTRACT:
A frequency divider circuit is selectively operable for providing an output signal characterized by a first frequency or a second frequency equal to one-half the first frequency. An input signal at the first frequency is supplied to the clock terminal of a D-type flip-flop and a stream of control pulses, developed in synchronism with the input signal, are selectively coupled by a logic circuit to the set terminal of the flip-flop. The D and Q terminals of the flip-flop are coupled together forming an output for providing a signal at the first frequency in response to the presence of the control pulses and at the second frequency in response to the absence of the control pulses.

REFERENCES:
patent: 3393366 (1968-07-01), Shoop
patent: 3800233 (1974-03-01), Sauthier
patent: 3967205 (1976-06-01), Rossi et al.
patent: 4092604 (1978-05-01), Berney

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