Apparatus for generating clock signal in optical disk and method thereof
US6970027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2004 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Jan 28, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/113
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A clock generator for reproducing data recorded onto an optical disk, and more particularly, an apparatus for stably generating a clock signal synchronized with an input signal and a method of generating a clock signal. The apparatus generating a clock signal includes a voltage controlled oscillator, a phase compensator, a frequency compensator, and an adder. The voltage controlled oscillator generates a clock signal of a frequency that varies with a control voltage signal. The phase compensator receives an input signal and the clock signal, detects a phase difference between the input signal and the clock signal, and generates a first control voltage corresponding to the phase difference. The frequency compensator receives the input signal and the clock signal, detects a frequency difference between the input signal and the clock signal, and generates a second control voltage corresponding to the frequency difference. The adder sums the first control voltage and the second control voltage and generates the control voltage signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.