Title: Phase locked loop having cycle slip detector capable of compensating for errors caused by cycle slips
Application Number: 200610107741 Application Date: 2006.07.21
Publication Number: 1901376 Publication Date: 2007.01.24
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03L7/08;H03L7/085;H03L7/099
Applicant(s) Name: Media Tek Inc. Address:
Inventor(s) Name: Wang Ping-ying;Yang Meng-ta;Hsieh Hsiang-ji
Attorney & Agent: tian shu
Abstract:
    A phase locked loop capable of compensating for errors caused by cycle slips. The phase locked loop includes a phase detection unit for generating a phase error signal; a loop filter for filtering the phase error signal and generating a first control signal; a cycle slip detector for detecting whether a cycle slip has occurred according to the phase error signal and generating a slip indication signal; a toggling unit for toggling the selection between a first value and a second value as a compensation signal according to the slip indication signal; an accumulator for accumulating the compensation signal and generating a second control signal; an adder for adding the first control signal and the second control signal and generating a third control signal; and a controllable oscillator for generating the output clock at a frequency based on the third control signal.
Time: 18