发明授权
- 专利标题: Switched deskew on arbitrary data
- 专利标题(中): 对任意数据进行切换歪斜
-
申请号: US10892760申请日: 2004-07-16
-
公开(公告)号: US07317775B1公开(公告)日: 2008-01-08
- 发明人: Richard Alexander Erhart , Loren Tomasi , Mark D. Kuhns , Arif Alam
- 申请人: Richard Alexander Erhart , Loren Tomasi , Mark D. Kuhns , Arif Alam
- 申请人地址: US CA Santa Clara
- 专利权人: National Semiconductor Corporation
- 当前专利权人: National Semiconductor Corporation
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Darby & Darby PC
- 代理商 John W. Branch
- 主分类号: H04L7/00
- IPC分类号: H04L7/00
摘要:
A method and circuit capable of handling skew between a clock and data signal up to +/− one half bit on a random input data pattern. A digital algorithm cycles through each data bit and individually deskews that bit by detecting data transitions in a first sampling region and in a second sampling region and determining a difference between a number of transitions in the first sampling region and a number of transitions in the second sampling region. The sampling regions and a deskew timing signal may then be incremented or decremented based on a comparison of the computed difference to a predetermined constant. If no transitions occur on a particular bit, the algorithm times out leaving the deskew timing signal in the original position. When analysis of a final bit of a channel is completed, the algorithm begins monitoring and analyzing the first bit of another channel.
信息查询