关于后仿真中SDF文件的hold time的负值问题(已解决供参考）

cuiyu1981 · 发表于 2019-8-8 11:19:43

学习了

ic小新 · 发表于 2019-11-29 19:44:19

好贴，学习

shuzi_ic · 发表于 2021-10-28 16:25:06

plummer 发表于 2013-1-23 09:41
当input transition time> output transition time时，delay为负值
所以hold time可能会出现负值，参见4-13 ...

bucuo xuexiaxia

lazioprocn · 发表于 2022-1-22 17:23:01

多谢解释

newsolider1 · 发表于 2022-11-17 19:30:07

学习好贴

huangguangxin · 发表于 2022-11-17 19:30:33

plummer 发表于 2013-1-23 09:41
当input transition time> output transition time时，delay为负值
所以hold time可能会出现负值，参见4-13 ...

下载了，好资料

热爱IC的小白 · 发表于 2023-5-30 15:07:38

Delays can be negative in some unusual situations. For example, if the input transition is
slow and the output transition is fast for a cell, the time at which the input signal reaches the
50% trip point can be later than the time at which the output signal reaches the 50% trip
point. The resulting delay from input to output is negative. A similar situation can occur for a
net because of a change in delay caused by crosstalk. In addition, the library hold time
requirement for a sequential cell can be negative.

[解决] 关于后仿真中SDF文件的hold time的负值问题(已解决供参考）

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