发明名称 |
Optical driver including a multiphase clock generator having a delay locked loop (DLL), optimized for gigahertz frequencies |
摘要 |
An optical (disc) driving system including the DLL based multiphase clock generator circuit capable of generating 32 different phases from input clock having a frequency of 800 MHz or greater. The multiphase clock generator includes on a delay locked loop (DLL) having a frequency divider for outputting an N-divided clock to a first set of M voltage-controlled delay cells within a feedback loop, and further including an identical set of M voltage-controlled delay cells outside of the feedback loop for delaying the undivided clock and for outputting M multiphase clocks. An optical driver circuit of an optical driving system and a method for implementing a write-strategy for preventing "overlapping" of marks written on adjacent grooves on an optical disc. The circuit and method produce multiple write-strategy waveforms (channels) switching at a high resolution (e.g., T/32) in the Gigahertz frequency range.
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申请公布号 |
US7486757(B2) |
申请公布日期 |
2009.02.03 |
申请号 |
US20050058826 |
申请日期 |
2005.02.16 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM HO-YOUNG;KIM YONG-SUB |
分类号 |
H03D3/24;G11B7/125 |
主分类号 |
H03D3/24 |
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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