Apparatus for recording and reproducing digital signal.
- 申请公布号：
- EP0206221(A2)
- 申请号：
- EP19860108246
- 申请日期：
- 1986.06.17
- 申请公布日期：
- 1986.12.30
- 申请人：
- SHARP KABUSHIKI KAISHA
- 发明人：
- II, HIROSHI;KOYANAGI, KATSUBUMI;YASUDA, SYUHEI
- 分类号：
- G11B20/14;G11B20/10;G11B20/22;(IPC1-7):G11B20/10
- 主分类号：
- G11B20/14
- 摘要：
- <p>An apparatus for recording and reproducing data signal carrying digital information at each reference phase (pi) appearing periodically includes detector (ZC, PD, 8, PCL) for detecting and producing a phase data at each sampling point. Two subsequently sampled phase data (Pi, Pi+1) are stored in latches (15, 14) for use in three comparators (17, 18, 19). The first comparator (18) compares the first sampled phase data (Pi+1) and the second sampled phase data (Pi). The second comparator (19) compares the first sampled phase data (Pi+1) with a predetermined value (N/2), and the third comparator (17) compares the second sampled phase data (Pi) with the predetermined value (N/2). Utilizing the outputs of the three comparators, a phase condition detector (20) detects whether or not a reference phase (pi) is contained between the two subsequent sampling points. A detection pulse generator (24, 26) is provided which generates a data detection pulse when the phase condition detector (20) detects the reference phase (pi).</p>
Copyright Notice © 2009-2024 传众 版权所有