Pulse swallow type programmable frequency dividing circuit

Details Pulse swallow type programmable frequency dividing circuit Pulse swallow type programmable frequency dividing circuit

1978-11-03

1981-04-28

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307225R, 328 46, H03K 2326, H03K 2136

Patent

active

042648637

ABSTRACT:
A pulse swallow type programmable frequency dividing circuit is provided which comprises a prescaler for dividing the frequency of an input signal in the frequency division ratio of 1/K or 1/(K+1) according to the contents of a control signal supplied to a control terminal; a programmable frequency divider for dividing the frequency of an output signal from the prescaler in a preset frequency division ratio; and a control signal generating circuit producing a control signal to the control terminal of the prescaler in response to an output pulse from the programmable frequency-divider, thereby changing the frequency division ratio of the prescaler. A preset number of control pulses whose pulse width is equal to a period of an output pulse signal from the prescaler are supplied from the control signal generating circuit to the control terminal of the prescaler to set the frequency division ratio of the prescaler at 1/(K+1).

REFERENCES:
patent: 3375448 (1968-03-01), Newman et al.
patent: 3431499 (1969-03-01), Godfrey
patent: 3484699 (1969-12-01), Israel
patent: 3811092 (1974-05-01), Charbonnier
"Dial any Channel to 500 Mhz", L. F. Blachowicz, Electronics, May 2, 1966 pp. 60-69.
IEEE Trans BTR-15 "A Digital Frequency Synthesizer For an AM and FM receiver,", J. Stinehelfer et al., pp. 235-243, Oct. 1969.

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