The authors describe an all-digital circuit for automatically controlling skew in the distribution of a clock or data signal over a single line. The circuit derives a compensating delay for any location such that a signal applied at one end emerges at the same global time at all sites. This is an alternative to delay-equalised hierarchical trees for use in large ICs, computers, and digital switches. A 3 /spl mu/m CMOS prototype at eight sites spread over 16 m shows adaptive skew control to within +/- 1.5 primitive buffer delays of the process employed. A novel technique for accommodating metastability is involved in the design.
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机译:作者描述了一种全数字电路,用于自动控制时钟或数据信号在单线上的分布中的偏斜。该电路为任何位置得出补偿延迟,以使一端施加的信号在所有站点的同一全局时间出现。这是用于大型IC,计算机和数字交换机的延迟均衡的分层树的替代方案。分布在16 m上八个位置的3 / spl mu / m CMOS原型显示自适应偏斜控制在所采用过程的原始缓冲区延迟的+/- 1.5之内。设计中涉及一种适应亚稳性的新技术。
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