Phase-locked loop having adjustable delay elements

Details Phase-locked loop having adjustable delay elements Phase-locked loop having adjustable delay elements

1999-06-14

2000-12-12

Kinkead, Arnold

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331 1A, 327158, 327159, 327161, H03L 718

Patent

active

061604569

ABSTRACT:
A phase-locked loop which achieves the effect of frequency expansion is disclosed. An adjustable delay element is incorporated in a conventional phase-locked loop in order that one of the output clock signals of a divided-by-N counter and a divided-by-M counter leads (lags behind) the other. This in turn causes a phase frequency detector to alternately generate `up` and `dn` signals, thereby frequency expansion is achieved.

REFERENCES:
patent: 5079520 (1992-01-01), Rapeli

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