Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site ucbvax.BERKELEY.EDU
Path: utzoo!watmath!clyde!cbosgd!ucbvax!info-vlsi
From: jgouge@MITRE-GATEWAY.ARPA (Jim Gouge)
Newsgroups: mod.vlsi
Subject: SPICE problem inquiry
Message-ID: <8601032103.AA01124@>
Date: Fri, 3-Jan-86 15:52:32 EST
Article-I.D.: .8601032103.AA01124
Posted: Fri Jan  3 15:52:32 1986
Date-Received: Sat, 4-Jan-86 05:54:14 EST
Sender: usenet@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 21
Approved: info-vlsi@sandia-cad.arpa


Can anyone help me with a SPICE problem?

I am attempting to make SPICE runs with no options set
and the following timing-related command lines:

	vphi1 7 0 pulse(0v 5v 5ns 5ns 5ns 35ns 100ns)
	vphi2 4 0 pulse(0v 5v 55ns 5ns 5ns 35ns 100ns)
	.trans 5ns 600ns

A typical error message I get is:

	*ERROR*:  INTERNAL TIMESTEP TOO SMALL IN TRANSIENT ANALYSIS

	          TIME = 1.05560d-07; DELTA = 4.76837d-18; NUMNIT = 1098

As indicated by the TIME parameter, this is after (in this case) 105ns 
of successful operation.  Runs have been made at levels 1, 2, and 3 
with the same sort results.

Any suggestions?