看上去像是初始时刻的工作点计算不容易收敛,可以试试设置skipdc=sigrampup,其功能如下:
Independent source values start at 0 and ramp up to their initial values in the first phase of the simulation. Unlike `skipdc=rampup', the waveform production in the time-varying independent source is enabled after the rampup phase. The rampup simulation is from the 'start' parameter. If the `start' parameter is not specified, the default `start' time is set to -`rampupratio'*`stop'.