发明名称 |
DLL circuit, update control apparatus in DLL circuit and update method of DLL circuit |
摘要 |
A delay locked loop (DLL) circuit includes a phase detection unit configured to generate a phase detection signal by comparing a phase of a reference clock signal with a phase of a feedback clock signal. An update control apparatus is configured to generate a valid interval signal and an update control signal by determining a difference between the number of first logical values and the number of second logical values of the phase detection signal in response to the reference clock signal. A shift register configured to update a delay value granted to a delay line in response to the update control signal when the valid interval signal is enabled.
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申请公布号 |
US7969214(B2) |
申请公布日期 |
2011.06.28 |
申请号 |
US20090493387 |
申请日期 |
2009.06.29 |
申请人 |
HYNIX SEMICONDUCTOR INC. |
发明人 |
JANG JAE MIN;KIM YONG JU;HAN SUNG WOO;SONG HEE WOONG;OH IC SU;KIM HYUNG SOO;HWANG TAE JIN;CHOI HAE RANG;LEE JI WANG;PARK CHANG KUN |
分类号 |
H03L7/06 |
主分类号 |
H03L7/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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