Hi,

I found even if I specify hspice accuracy setting to runlvl=6 and accurate, the waveform from verilogA blocks still look ugly.

Is there any other setting I can use to make verilogA part more accurate?

Thanks,
Neo

You may also want to have a close look at your Verilog-A module:
- does it have continuous/smooth outputs (as a function of the inputs)
- do you have scaling issues (outputs that are huge or tiny compared to the normal scale of voltages and currents)