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Re: worst case lib in setup time and best case in hold time
In ASIC design, usually, there are three provided timing model: worst, typical, and best. Generally, worst setup time is the longest among the setup times in the three models while the best case hold time is the shortest. If your...
Re: The best LPE tools ?
calibre rcx is a hierarchical rc extraction tool. It is fast to do the RC extraction. However, all the hierarchical rcx tool have the accuracy problem. You need to turn on the flat mode to get the accurate extracted data, especially for analog design.
Re: C@dence Ultr@sim
HSIM is the best in terms of accuracy (use analog mode 3); Ultrasim is probably silmilar to Nanosim. My opinion, up to now, HSIM is the best transistor level simulator to simulate the design which HSPICE has the difficulty.
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