Phase locked loop with phase difference signal adjustment circui

Details Phase locked loop with phase difference signal adjustment circui Phase locked loop with phase difference signal adjustment circui

1990-07-31

1992-02-18

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

331 20, 331 25, 358158, H03L 793

Patent

active

050897926

ABSTRACT:
A phase looped oscillating circuit includes a signal comparing device which can compare a plurality of different input signals with each other and emit a signal based on this comparison. The signal comparing device emits a control signal to a level converting device, a signal converting device is operatively connected to the level converting device. A signal from the converting device is received by an oscillating device and an oscillating signal is fed back to the signal comparing device via a divider. To compensate for fluctuation of an invertor in the signal converting device, the signal comparing device provides a fixed level signal stabilized at a 50% duty cycle. This stabilization also stabilizes electrical noises that may be present.

REFERENCES:
patent: 3921092 (1975-11-01), Schatz
WO-A-8808644, Nov. 3, 1988 PCT Publication.

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