Device for fixing the phase of frequency synthesizer outputs

Details Device for fixing the phase of frequency synthesizer outputs Device for fixing the phase of frequency synthesizer outputs

1987-11-19

1989-09-19

Miller, Stanley D.

Oscillators

Relaxation oscillators

331 40, 307271, H03B 1900, H03L 700

Patent

active

048685100

ABSTRACT:
An improvement in a frequency synthesizer having a generator which produces mix frequencies and at least one mix and filter stage, said stage having a frequency divider. The improvement comprising: (1) a frequency divider for producing a periodic signal the frequency of which is an integer divisor of the mix frequencies, (2) a one-shot for producing an enabling signal whenever a change occurs in the selection of the frequency being synthesized, the duration of the enabling signal being sufficient to ensure coincidence of it and said periodic signal, and (3) a coincidence gate for resetting the frequency divider of each mix and filter stage to a predetermined state whenever there is a coincidence of the enabling signal and the periodic signal.

REFERENCES:
patent: 4725786 (1988-02-01), Papaieck

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