Talk:Phase detector

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a signal changes its phase by 2 pi multiplied its frequency. phase detector can be realised by sequencial as well as analog circuit by didode or cmos for high speed. normally a charge pump is required before filtering the dc ouput by low pass filter, a charge pump gives constant current output which is nothing but a three pole switch. many software is availave for pll simulation from which code loader is the modarate freeware from naional semiconductor.

[edit] Charge Pump

A charge pump isn't a phase detector by itself. This should be corrected in the article. --Necto 08:41, 12 April 2007 (UTC)