Digital frequency synthesizer

Details Digital frequency synthesizer Digital frequency synthesizer

1978-09-11

1980-12-16

Heyman, John S.

328159, H03K 378

Patent

active

042400341

ABSTRACT:
A digital frequency synthesizer is disclosed wherein a series of binary level signals are produced, the level of such signals changing at a frequency related to a selected frequency f. The synthesizer includes a counter which counts clock pulses fed thereto at a pulse repetition frequency f.sub.cp producing a first digital word representative of the number counted clock pulses. An adder cumulatively adds a second digital word representative of f.sub.cp
f, where n is an even integer, each time the whole number portion of the cumulatively added second digital word equals the first digital word. A comparator produces a control signal indicative of whether the whole number portion of the cumulatively added second digital word is equal to the first digital word. A flip/flop, responsive to the control signal, produces a binary level signal, the level of such signal changing at a frequency related to the frequency f.

REFERENCES:
patent: 3464018 (1969-08-01), Cliff
patent: 3882404 (1975-05-01), Gerken

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