发明名称 |
Apparatus for detecting phase error by using zero crossing characteristics of input signal, and phase locked loop circuit using the same |
摘要 |
An apparatus for detecting a phase error for a system such as a CD or a DVD having a multi-level input signal with an irregular zero crossing shift, and a phase locked loop circuit using the same. An A/D converter digitizes a signal read from the CD or the DVD. A phase error detect unit detects a zero crossing of the digital signal consecutively input from the A/D converter, and detects a timing error from a signal corresponding to the detected zero crossing. An error correction unit corrects a sampling timing error of the A/D converter by shifting a phase corresponding to the timing error input from the phase error detect unit. An apparatus for detecting a timing error having a tracking function reduces the amount of normal jitter and a dispersion value of the timing error in accordance with a signal to noise ratio.
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申请公布号 |
US6750725(B2) |
申请公布日期 |
2004.06.15 |
申请号 |
US20020190600 |
申请日期 |
2002.07.09 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
LEE JAE-WOOK;KO SEOK-JUN;KIM PAN-SOO;CHOI HYUNG-JIN |
分类号 |
H03D13/00;H03L7/091;(IPC1-7):H03L7/00 |
主分类号 |
H03D13/00 |
代理机构 |
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主权项 |
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地址 |
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