[SI-LIST] Re: HSPICE error

Hi Nancy,

This happens because during the DC operating point, capacitors are open,
inductors are shorted, resistors are their assigned values and all sources are
set to their DC values.

You can use use the DCSTEP option.  DCSTEP will convert element and model
capacitors to a conductance value.  The value of the element capacitors are
divided by DCSTEP to obtain a DC conductance value.  The units of DCSTEP is
seconds.  Setting

.option DCSTEP=1p

will avoid the "no dc path to ground" error.


Tracy Barclay
CAE
Synopsys, Inc.

> SI-list,
>
> I am using Star-HSPICE to simulate a very simple circuit, but I got an error
> message "no dc path to ground from node    0:3 ". Can HPICE simulate this
> kind of circuit? How can I fix the error? Thanks.
>
> -----------------circuit script ------------------
> .option post = 2
> .ac lin 100 1e6hz 5ghz
> vs 1 0 ac 1
> rs 2 1 50
> c1 3 2 1e-12
> c2 3 0 2e-12
> .print ac vm(3)
> .end
> ---------------------------------------------------
> **error**:  no dc path to ground from node    0:3
>
> Nancy
>
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