[SI-LIST] Re: negative mos conductance
- From: "lgreen" <lgreen22@xxxxxxxxxxxxxx>
- To: <silverhawk2040@xxxxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 11 Oct 2004 17:23:21 -0700
Hello, Manish,
1) This is a convergence problem. You might want to investigate your
settings for GMIN and the various tolerance controls (VTOL, RELTOL, =
etc.).
2) One might also want to investigate the model parameters. Sometimes
transistor "models" (i.e. parameter sets) are non-physical. This can be
caused, for example, by quirks in solving the N-dimensional parameter
extraction problem with correlated parameters.
Best regards,
Lynne
"IBIS training when you need it, where you need it."
Dr. Lynne Green
Green Streak Programs
http://www.greenstreakprograms.com
lgreen22@xxxxxxxxxxxxxx
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
On
Behalf Of manish bhakuni
Sent: Thursday, October 07, 2004 9:01 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] negative mos conductance
=A0
hello ppl out there
im trapped in simulation of some circuits in HSPICE.
it gives me negative mos conductance and internal time step too small =
for
transient analysis. plz tell me the reason fot these and there =
solution.
plz also tell me where i can find good tutorials on HSPICE.
yours sincerely
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