发明名称 |
Method for digital clock recovery from Manchester-encoded signals |
摘要 |
A method for rapidly recovering the clock from Manchester-encoded signals using simple digital techniques is provided for use in an inexpensive Manchester-encoding receiver. The received Manchester-encoded signal is monitored to determine zero-voltage crossing. At each such crossing the frequency of the recovered clock is adjusted by comparing the occurrence of the zero-crossing with respect to the midpoint of the period of the presently-generated recovered clock. Shorten, center or lengthen adjustment signals are generated as a result of this comparison which are used to shorten or lengthen, by 1/16 increments of the inter-bit period of the received data signal, the period of the next-generated recovered-clock. The method is readily implemented as a sixteen-stage programmable counter providing a phase-locked loop.
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申请公布号 |
US4608702(A) |
申请公布日期 |
1986.08.26 |
申请号 |
US19840684919 |
申请日期 |
1984.12.21 |
申请人 |
ADVANCED MICRO DEVICES, INC. |
发明人 |
HIRZEL, FREDERIC J.;LEVY, ROY J. |
分类号 |
H03K5/00;H03M5/12;H04L7/033;(IPC1-7):H04L7/02 |
主分类号 |
H03K5/00 |
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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