an error in Hspice simulation again! help me! Hughes:)

[prcken]

hspice logic025.l

this is the netlist, the same as i posted before*voltage swing for pass-transistor +circuits

m1 vout x gnd gnd nch l=0.25u w=0.5u
m2 vout x vdd vdd pch l=0.25u w=1.5u
mpass vin x x vdd nch l=0.25u w=0.5u
vdd vdd gnd 2.5
vin vin gnd pulse(0 2.5 0.26ns 0.2ns 0.2ns 2ns 4ns)
.ic v(x)=0
.tran 0.1ns 2ns
.lib 'E:\work\logic025.l' TT
.model nch nmos
.model pch pmos
.probe v(x) v(vout)
.end

************************************************************
still that coms25_level49 library i can not use. so i changed a TSMC .25 library
it works for other netlist file, but this one failed, the error is as below:
**error**: internal timestep too small in transient analysis

time = 1.04688D-10; delta = 3.72529E-19; numnit = 237

**warning** no convergence, invoking autoconvergence


***** job aborted

thanks!!!

 

[Hughes]

I think you made a mistake in the netlist.
Mpass should be a pmos, or its bulk terminal should be connected to gnd.

 

[prcken]

absolutely right
thanks