Digital phase lock detector and low-pass filter selector

Details Digital phase lock detector and low-pass filter selector Digital phase lock detector and low-pass filter selector

1997-06-11

1999-09-21

Le, Amanda T.

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

375374, 331 17, 331 18, 331 25, H03D 324

Patent

active

059563796

ABSTRACT:
A digital phase lock detector and phase lock loop filter selector circuit implemented in hardware that dynamically selects a phase lock loop filter of appropriate bandwidth for the instant phase error condition. Phase error is primarily determined by an XOR gate receiving the PLL reference signal and the oscillator feedback signal coupled to a counter that is clocked by a high frequency signal.

REFERENCES:
patent: 5420545 (1995-05-01), Davis et al.
patent: 5613235 (1997-03-01), Kivari et al.
patent: 5793824 (1998-08-01), Burch et al.

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