Hybrid phase-locked loop employing analog and digital loop filte

Details Hybrid phase-locked loop employing analog and digital loop filte Hybrid phase-locked loop employing analog and digital loop filte

1997-05-23

1999-11-02

Chin, Stephen

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

375375, 375376, 331 10, 327159, H03D 324

Patent

active

059784253

ABSTRACT:
The invention provides a hybrid phase-locked loop (PLL) containing digital and analog portions for digital and analog adjustments, respectively, of an output signal. The hybrid PLL is simple in design. Off-the-shelf controlled oscillators, such as a current controlled oscillator (CCO) can be used with this hybrid PLL. The digital and the analog portions of the hybrid PLL are separate from the controlled oscillator. The digital portion is for a first adjustment of the frequency of the output signal, such as during a calibration. The analog portion is for fine phase and frequency adjustment of the output signal.

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Chapter 3 entitled "The Classical Digital PLL (DPLL)" in book entitled Phase-Locked Loops; Theory, Design, and Applications by Roland E. Best published by McGraw-Hill, Inc., 1993.COPYRGT..

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