dc sweep convergence issue for cmos inverter

Published: 13/01/2019
dc sweep convergence issue for cmos inverter
Source: ELECTRONICS.STACKEXCHANGE.COM

I am having some convergence issue with DC sweep for a CMOS inverter. To duplicate the exact issue, see the following log as well as the attached netlist files, together with modelcard.nmos and modelcard.pmos I have tried various suggestions online (such as bypassing .op analysis , using smaller dc sweep step, use .ic initial condition, add parasitic resistance to circuit nodes), but those do not

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