Phase lock loop for rapid lock-in and method therefor

Details Phase lock loop for rapid lock-in and method therefor Phase lock loop for rapid lock-in and method therefor

2007-01-05

2009-06-09

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

C331S017000, C331SDIG002

Reexamination Certificate

active

07545222

ABSTRACT:
A phase-locked loop (PLL) for rapid lock-in applicable to digital, analog, or hybrid digital-analog PLL circuits is provided. Besides the units for basic operation, including a phase-frequency detector (PFD), a charge pump, a loop filter, and/or a voltage/current/digital-controlled oscillator (VCO/ICO/DCO), an additional lock-in actuator circuit is provided for providing lock-in signals, achieving the purpose of rapid lock-in through operational processes.

REFERENCES:
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patent: 5337335 (1994-08-01), Cloetens et al.
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patent: 7245687 (2007-07-01), Chang
patent: 7382163 (2008-06-01), Kuo et al.
patent: 2003/0048139 (2003-03-01), Chien
patent: 1387321 (2002-12-01), None
patent: 103 54 522 (2005-06-01), None
patent: 10 2004 006 996 (2005-09-01), None
patent: 0 471 502 (1992-02-01), None
patent: 234933 (2005-06-01), None
patent: WO2005/078935 (2005-08-01), None
English language translation of abstract of TW 234933 (p. 3 of reference).
English language translation of abstract of CN 1387321.

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