Phase synchronous circuit

Details Phase synchronous circuit Phase synchronous circuit

1996-06-14

1997-11-11

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

With intermittent comparison controls

331 1A, 331 17, 327159, H03L 708, H03L 710

Patent

active

056868650

ABSTRACT:
A novel phase synchronous circuit includes a phase comparator, a first loop filter being electrically connected to the multiplying phase comparator, a second loop filter being electrically connected to the first loop filter, a voltage control oscillator being electrically connected to the second loop filter, an inventor circuit having an input side being electrically connected to the voltage control oscillator and a switching circuit having two input terminals and a single output terminal. The input terminal is electrically connected to the voltage control oscillator. The input terminal is electrically connected to an output terminal of the invertor circuit. The output terminal is electrically connected to an output terminal and also to an input side of the multiplying phase comparator. An input terminal is also electrically connected to another input of the multiplying phase comparator. Further, the novel phase synchronous circuit includes a hysteresis comparator having first and second inputs being electrically connected to an output side of the first loop filter and an output side of the second loop filter respectively. In the initial state, the switching circuit has an electrical connection between the input terminal and the output terminal.

REFERENCES:
patent: 5170135 (1992-12-01), Ito et al.

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