Phase-locked loop frequency synthesizer having reduced power con

Details Phase-locked loop frequency synthesizer having reduced power con Phase-locked loop frequency synthesizer having reduced power con

1986-07-10

1987-05-19

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

With intermittent comparison controls

331 16, 331 17, 331 25, 455343, H03L 718

Patent

active

046671692

ABSTRACT:
In an improved phase-locked loop frequency synthesizer, a voltage is continuously applied from a power source to a fixed divider and a programmable divider respectively composed of such lower electric power consuming means as C-MOS circuitry such that the fixed and programmable dividers preserve the counting value thereof when their inputs are interrupted at the time of changing from a phase-locked loop to an open loop so that phase lock is achieved in a short time with less consumption of electric power.

REFERENCES:
patent: 4521918 (1985-06-01), Challen

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