发明名称 |
Timing control for PRML class IV sampling data detection channel |
摘要 |
A multi-mode timing loop for a PR4,ML sampled data channel includes an analog to digital converter and a digital finite impulse response filter for providing conditioned digital samples. The timing loop includes a reference clock source for putting out a reference clock frequency related to a nominal sample data rate, a frequency controllable oscillator connected to generate a sample clock, an analog timing loop and a digital timing loop. The analog timing loop provides phase lock during non-data read mode, and during data read mode the digital timing loop provides a vernier offset for fine adjustment of phase lock to a static setting then provided by the analog timing loop.
|
申请公布号 |
US5258933(A) |
申请公布日期 |
1993.11.02 |
申请号 |
US19920936756 |
申请日期 |
1992.08.27 |
申请人 |
QUANTUM CORPORATION |
发明人 |
JOHNSON, KENNETH E.;ABBOTT, WILLIAM L.;NGUYEN, HUNG C. |
分类号 |
G11B20/10;G11B20/12;G11B20/14;H04L7/02;H04L7/04;H04L7/08;H04L7/10;(IPC1-7):G06J1/00;G06F15/31 |
主分类号 |
G11B20/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|