Variable-speed phase-locked loop system with on-the-fly switchin

Details Variable-speed phase-locked loop system with on-the-fly switchin Variable-speed phase-locked loop system with on-the-fly switchin

1997-02-18

1998-11-17

Dinh, Son T.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 11, 327147, 327156, H03L 707

Patent

active

058382054

ABSTRACT:
According to the preferred embodiment, a phase-locked loop system is provided that overcomes the limitations of the prior art by providing the ability to switch output frequencies without a disruption in the phase lock of the output signal. The system uses a first phase-locked loop coupled with a second phase lock-loop such that their output signals are phase aligned and a switching mechanism for switching between the first phase lock output signal and the second phase lock loop output signal. The system is thus able to switch the frequency of its output without a disruption in the phase-lock of the signal.

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patent: 5317284 (1994-05-01), Yang
patent: 5332978 (1994-07-01), Yabuki, et al.
patent: 5572167 (1996-11-01), Alder et al.

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