Invention Grant
- Patent Title: Digital phase-locked loop circuit
- Patent Title (中): 数字锁相环电路
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Application No.: US10935863Application Date: 2004-09-08
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Publication No.: US07218176B2Publication Date: 2007-05-15
- Inventor: Chun-Wei Lin , Hsueh-Kun Liao , Chih-Ching Chen
- Applicant: Chun-Wei Lin , Hsueh-Kun Liao , Chih-Ching Chen
- Applicant Address: TW Hsinchu
- Assignee: Mediatek Inc.
- Current Assignee: Mediatek Inc.
- Current Assignee Address: TW Hsinchu
- Agency: Thomas, Kayden, Horstemeyer & Risley
- Priority: TW92125806A 20030918
- Main IPC: H03L7/00
- IPC: H03L7/00

Abstract:
A digital phase-locked loop circuit includes a counter for outputting a count value corresponding to an output frequency outputted by a voltage controlled oscillator in response to a control voltage signal, a comparator for comparing the count value from the counter with a target value associated with a target frequency output and for outputting a comparison signal according to a comparison result therebetween, a digital reference value generator for outputting a digital reference value according to the comparison signal from the comparator and including a register for storing the digital reference value therein, and a digital-to-analog converter for generating the control voltage signal based on the digital reference value received from the digital reference value generator.
Public/Granted literature
- US20050062549A1 Digital phase-locked loop circuit Public/Granted day:2005-03-24
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