Phase locked-loop generator with closed-loop forcing function sh

Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements

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331 17, 331 25, H03B 308

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active

044424124

ABSTRACT:
A phase locked-loop circuit includes a non-linear voltage controlled oscillator ideally producing a desired output frequency as a function of time and a memory producing signals which add to the phase locked-loop phase error feedback signal to correct for the VCO non-linearities. A calibration circuit upon activation is responsive to the phase error feedback signal for altering the contents of the memory such as to reduce or eliminate the phase error.

REFERENCES:
patent: 4103250 (1978-07-01), Jackson
patent: 4190807 (1980-02-01), Weber
patent: 4380742 (1983-04-01), Hart
patent: 4382234 (1983-05-01), Olbrechls

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