virtuoso tran仿真波形跳变不收敛的一种解决办法与参数调优记录

最近在搞整个芯片的tran仿真，经常性发生tran仿真不收敛的情况。

下面是其中一种不收敛情况的现象及其解决办法.

现象:

在波形应该要突变的时刻，发生了仿真不收敛的情况.

解决办法：

解决办法的原理说明：

设置transient options中的cmin参数，保证每个节点都会有一个小电容到地，从而延长信号边沿变化的时间，这可以解决掉大部分的波形跳变问题，并且一般不会影响电路的功能

参考链接：

https://blog.csdn.net/Clara_D/article/details/124144318#:~:text=%E8%A7%A3%E5%86%B3%E6%96%B9%E6%B3%95%E6%98%AF%E5%85%88%E6%89%BE%E5%88%B0Spectre%20log,%E4%B8%AD%E7%9A%84%E9%9D%9E%E6%94%B6%E6%95%9B%E8%8A%82%E7%82%B9%E3%80%81%E6%B3%A2%E5%BD%A2%E4%B8%8D%E8%BF%9E%E7%BB%AD%E6%80%A7%E7%9A%84%E8%8A%82%E7%82%B9%E6%88%96%E8%80%85%E9%9D%9E%E5%B8%B8%E5%B0%8F%E7%9A%84LC%E6%97%B6%E9%97%B4%E5%B8%B8%E6%95%B0%E3%80%82%20%E5%8F%AF%E4%BB%A5%E5%B0%86%22maxiters%22%E7%9E%AC%E6%80%81%E6%8E%A7%E5%88%B6%E5%8F%82%E6%95%B0%E8%AE%BE%E7%BD%AE%E4%B8%BA%E4%B8%80%E4%B8%AA%E8%BE%83%E5%A4%A7%E7%9A%84%E5%80%BC%EF%BC%8C%E5%8F%AF%E4%BB%A5%E5%8A%A0%E5%A4%A7%E6%94%B6%E6%95%9B%E7%9A%84%E5%8F%AF%E8%83%BD%E6%80%A7%E3%80%82%20%E6%B3%A8%E6%84%8F%EF%BC%9A%E5%9C%A8%E7%A1%AE%E5%AE%9A%E4%BA%86%E6%AD%A5%E9%95%BF%E5%A4%AA%E5%B0%8F%E7%9A%84%E5%8E%9F%E5%9B%A0%E4%B9%8B%E5%90%8E%EF%BC%8C%E8%A6%81%E8%AE%B0%E5%BE%97%E6%8A%8AIteratio%E6%81%A2%E5%A4%8D%E5%88%B0%E5%8E%9F%E6%9D%A5%E7%9A%84%E7%BC%BA%E7%9C%81%E5%80%BC%E3%80%82https://blog.csdn.net/Clara_D/article/details/124144318#:~:text=%E8%A7%A3%E5%86%B3%E6%96%B9%E6%B3%95%E6%98%AF%E5%85%88%E6%89%BE%E5%88%B0Spectre%20log,%E4%B8%AD%E7%9A%84%E9%9D%9E%E6%94%B6%E6%95%9B%E8%8A%82%E7%82%B9%E3%80%81%E6%B3%A2%E5%BD%A2%E4%B8%8D%E8%BF%9E%E7%BB%AD%E6%80%A7%E7%9A%84%E8%8A%82%E7%82%B9%E6%88%96%E8%80%85%E9%9D%9E%E5%B8%B8%E5%B0%8F%E7%9A%84LC%E6%97%B6%E9%97%B4%E5%B8%B8%E6%95%B0%E3%80%82%20%E5%8F%AF%E4%BB%A5%E5%B0%86%22maxiters%22%E7%9E%AC%E6%80%81%E6%8E%A7%E5%88%B6%E5%8F%82%E6%95%B0%E8%AE%BE%E7%BD%AE%E4%B8%BA%E4%B8%80%E4%B8%AA%E8%BE%83%E5%A4%A7%E7%9A%84%E5%80%BC%EF%BC%8C%E5%8F%AF%E4%BB%A5%E5%8A%A0%E5%A4%A7%E6%94%B6%E6%95%9B%E7%9A%84%E5%8F%AF%E8%83%BD%E6%80%A7%E3%80%82%20%E6%B3%A8%E6%84%8F%EF%BC%9A%E5%9C%A8%E7%A1%AE%E5%AE%9A%E4%BA%86%E6%AD%A5%E9%95%BF%E5%A4%AA%E5%B0%8F%E7%9A%84%E5%8E%9F%E5%9B%A0%E4%B9%8B%E5%90%8E%EF%BC%8C%E8%A6%81%E8%AE%B0%E5%BE%97%E6%8A%8AIteratio%E6%81%A2%E5%A4%8D%E5%88%B0%E5%8E%9F%E6%9D%A5%E7%9A%84%E7%BC%BA%E7%9C%81%E5%80%BC%E3%80%82

免责声明：本文系网络转载或改编，未找到原创作者，版权归原作者所有。如涉及版权，请联系删