Phase locked loop with digital vernier control

Details Phase locked loop with digital vernier control Phase locked loop with digital vernier control

1998-05-29

2000-02-29

Kinkead, Arnold

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 18, 331 47, 331 48, 327156, 327159, 327162, 375376, H03L 706

Patent

active

060314265

ABSTRACT:
A phase-locked-loop-stabilized voltage controlled oscillator relies on a sampling of the analog-frequency-control voltage of a voltage-controlled oscillator in a phase-locked-loop circuit to act as a reference voltage for a second free-running voltage-controlled oscillator. A vernier-adjustment voltage is injected into the control input of the second voltage-controlled oscillator to produce a finely variable derivative frequency not otherwise producible by a conventional phase-locked-loop circuit.

REFERENCES:
patent: 3927384 (1975-12-01), Jezo

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