Newsgroups: sci.electronics
Path: utzoo!utgpu!watserv1!sunee!sunee.waterloo.edu!simpson
From: simpson@sunee.waterloo.edu (KFS Lam)
Subject: Filter simulation in Pspice
Message-ID: <1990Nov9.160343.3301@sunee.waterloo.edu>
Sender: daemon@sunee.waterloo.edu
Organization: University of Waterloo
Distribution: na
Date: Fri, 9 Nov 90 16:03:43 GMT
Lines: 13

Hi, I am currently doing a passive filter design with Pspice
on a PC. Unfortunately, Pspice performs DC analysis automatically
at the beginning. Since my circuit is passive, there are no
DC sources and Pspice starts to compliant about floating
nodes. (Some of my nodes have capicitor connected to other
nodes, so no DC can get through. Therefore, Pspice thinks
they are floating.) I get around it by putting a HUGE resistor
from that node to ground. Then Pspice starts to complaint about
convergence problem in DC analysis. Is there any way you can
shut off the DC analysis after checking the circuit? Or there
are ways to get around that?

				simpson@sunee.waterloo.edu