Frequency synthesizer of the phase lock loop type

Details Frequency synthesizer of the phase lock loop type Frequency synthesizer of the phase lock loop type

1981-01-19

1983-04-19

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 16, 331 25, 307271, H03L 718

Patent

active

043807437

ABSTRACT:
In a phase lock loop frequency synthesizer, a successive addition rate multiplier provides a correction signal for eliminating ripple in a frequency control signal applied to a variable frequency oscillator which produces the output frequency of the synthesizer. Ripple elimination is improved by means of a feedback loop by which any residual ripple is detected and the correction signal is automatically adjusted.

REFERENCES:
patent: 3928813 (1975-12-01), Kingsford-Smith
patent: 4179670 (1979-12-01), Kingsbury

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