发明授权
- 专利标题: High speed clock distribution transmission line network
- 专利标题(中): 高速时钟分配传输线网络
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申请号: US11596968申请日: 2005-05-23
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公开(公告)号: US07679416B2公开(公告)日: 2010-03-16
- 发明人: Chung-Kuan Cheng , Hongyu Chen
- 申请人: Chung-Kuan Cheng , Hongyu Chen
- 申请人地址: US CA Oakland
- 专利权人: The Regents of the University of California
- 当前专利权人: The Regents of the University of California
- 当前专利权人地址: US CA Oakland
- 代理机构: Greer, Burns & Crain, Ltd.
- 国际申请: PCT/US2005/018176 WO 20050523
- 国际公布: WO2005/117263 WO 20051208
- 主分类号: H03K19/003
- IPC分类号: H03K19/003
摘要:
The invention is directed to a method for clock distribution and VLSI circuits include a clock distribution network. In a method of the invention, a transmission lines are patterned as to connect a clock tree and a periodic waveform clock, preferably a sine waveform, is used to control clock skew, even at frequencies extending into the gigahertz range. In an exemplary embodiment of the invention, an overlay includes differential pairs of transmission lines that connect the drivers of a clock distribution tree. In preferred embodiments of the invention, an H-tree clock distribution scheme is overlayed with a spiral of transmission lines, each realized by a differential conductors and driven using a sinusoidal standing wave to distribute global clock signals into local regions of the chip. Each transmission line connects drivers in the H-tree that are at the same level of the H-tree. In a VLSI chip according to an embodiment of the invention, the transmission line overlay delivers sinusoidal clock signals to local areas that are locally converted into digital clock signals. The invention thus presents a passive technique for clock distribution.
公开/授权文献
- US20080030252A1 High Speed Clock Distribution Transmission Line Network 公开/授权日:2008-02-07
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