Lock detection circuit and lock detecting method

Details Lock detection circuit and lock detecting method Lock detection circuit and lock detecting method

2009-05-14

2011-10-18

Lam, Tuan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By presence or absence pulse detection

C327S023000, C327S024000, C327S039000, C327S043000, C327S047000, C327S049000

Reexamination Certificate

active

08040156

ABSTRACT:
Provided are a lock detection circuit and a lock detecting method. The lock detection circuit includes two delay devices, four flip-flops and two logic gates, and can accurately detect a lock state of a phase locked loop (PLL) circuit. Therefore, the lock detection circuit can be implemented in a simple structure, and as a result, the lock detection circuit can be compact in size and can consume less electric power. Also, the lock detecting method enables lock detection process to be simpler, so that a lock state can be detected within a short time period.

REFERENCES:
patent: 5008635 (1991-04-01), Hanke et al.
patent: 5530383 (1996-06-01), May
patent: 5909130 (1999-06-01), Martin et al.
patent: 5969576 (1999-10-01), Trodden
patent: 6670834 (2003-12-01), Swanson
patent: 6744838 (2004-06-01), Dixit
patent: 6927635 (2005-08-01), Miki et al.
patent: 7015727 (2006-03-01), Balasubramanian
patent: 7676014 (2010-03-01), Chen et al.
patent: 2005/0084051 (2005-04-01), Nauta et al.
patent: 2007/0285082 (2007-12-01), Kimura et al.
patent: 2007/0285132 (2007-12-01), Oh
patent: 09-214333 (1997-08-01), None
patent: 1020070061049 (2007-06-01), None
patent: 1020080031536 (2008-04-01), None

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