Phase lock loop system including a primary phase lock loop appar

Details Phase lock loop system including a primary phase lock loop appar Phase lock loop system including a primary phase lock loop appar

1995-09-29

1998-09-08

Kinkead, Arnold

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

331 1A, 331 11, 375376, 360 51, 327159, G11B 500, G11B 2710, H03L 7087, H03L 710

Patent

active

058050248

ABSTRACT:
A phase lock loop system includes: a phase detecting circuit which operates on the basis of a signal waveform; a current output circuit for generating a current value from a phase difference detected by the phase detecting circuit; a filter which is constructed by only a resistor in a phase locked state by a synchronizing signal and by a capacitor and the resistor upon phase following state; and a voltage controlled oscillator for controlling an oscillation frequency by a voltage output of the filter. The phase lock loop system operates as a primary phase lock loop circuit in the phase locked state by the synchronizing signal and operates as a secondary phase lock loop circuit upon phase following state.

REFERENCES:
patent: 4855689 (1989-08-01), Kinkel
patent: 5157354 (1992-10-01), Saiki et al.
Nobuo Ogawa, "New PLL Techniques", published by Ohm Co., Ltd., 1986, pp. 16-30.

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