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Re: [Gnucap-devel] pulse again

From: al davis
Subject: Re: [Gnucap-devel] pulse again
Date: Fri, 31 Jan 2014 20:43:51 -0500
User-agent: KMail/1.13.7 (Linux/3.2.0-4-amd64; KDE/4.8.4; x86_64; ; )

On Friday 31 January 2014, Felix Salfelder wrote:
> Hi Al.
> bm_pulse.{1,2,3}.ckt contains
> Y1   2  3  pulse iv=20u pv=0 delay=500n period=1u
> Y2   3  0  pulse iv=0 pv=20u delay=500n period=1u
> but, this doesn't seem to work as intended. the period
> argument is "ignored".
> this apparently goes back to a fix in, commit
> 8d51d947799.

RCS 26.76 2008/03/25

(This is one of the features of RCS that I wish GIT had.)

It is working correctly.  The test files are not correct in the 
sense of testing something reasonable from a circuit view, but 
are historical and do test an important part of the simulator 
that might not be tested properly if tests were required to be 

The correct response is a single transition followed by flat, 
with no glitches when the period resets.

"delay" is not periodic.  It is a one time delay that shifts the 
whole thing.

To make that test case work as originally intended, change delay 
to width.

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