发明授权
- 专利标题: Semiconductor integrated circuit device
- 专利标题(中): 半导体集成电路器件
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申请号: US10863258申请日: 2004-06-09
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公开(公告)号: US07424081B2公开(公告)日: 2008-09-09
- 发明人: Kazuhisa Suzuki
- 申请人: Kazuhisa Suzuki
- 申请人地址: JP Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Mattingly, Stanger, Malur & Brundidge, PC
- 优先权: JP2003-194743 20030710
- 主分类号: H04L7/00
- IPC分类号: H04L7/00
摘要:
An error rate of a bit synchronous circuit is decreased to a large extent by preventing following excessively the jitters included in input data. A phase detect circuit of a bit synchronous circuit includes a majority decision circuit. The majority decision circuit counts UP0 and DN0 signals as a phase comparison result of comparing phases by a UP0 counter and a DN0 counter for a period of time, and its count number is judged by a magnitude relation determination circuit. The magnitude relation determination circuit outputs an UP signal if the UP0 signal is majority, a DN signal if the DN0 signal is majority, and a FIX signal if the UP0 signal is equal to the DN0 signal. Accordingly, since it is possible to prevent following the jitters included in input data, etc., an error rate for bit synchronization can be reduced to a large extent.
公开/授权文献
- US20050008111A1 Semiconductor integrated circuit device 公开/授权日:2005-01-13