Fractional megahertz counter for improved digital synthesizer

Details Fractional megahertz counter for improved digital synthesizer Fractional megahertz counter for improved digital synthesizer

1975-01-23

1976-04-06

Safourek, Benedict V.

Oscillators

Relaxation oscillators

331 1A, 331 18, H03B 308

Patent

active

039493040

ABSTRACT:
A voltage controlled oscillator in a phase locked loop generates signals through the avionics communication band, and the VCO output is divided alternately by first and second factors corresponding to kilohertz range increments, and then by a third factor corresponding to the applicable megahertz increment. The relative time periods during which the respective KHz factors are utilized depends upon the count generated by a logical circuit, operating responsively to encoded representations of channels to be utilized. First and second preloaded counters operate for a predetermined time period, during which both factors are utilized alternatively; during the remainder of the counting cycle, only one factor is utilized.

REFERENCES:
patent: 3353104 (1967-11-01), Loposer
patent: 3484699 (1969-12-01), Israel

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