Electronics Forum / CAD / June 2004

Hello people!
       What do you suggest for free PCB design package? I looked at some from
companies that make PCB's.
        www.pcb123.com : only works with Win2K and XP and 2003 (I use Win98)

Do anybody here have a LT Spice model for the "Delay Line" like the "DELAY"
component that exists in PSpice?
Thanks.

Which is/are the most significant parameter(s) to watch out for
governing/limiting the maximum decent speed of switching for
transistors operating at VHF and beyond?
Thanks, p.

  I'm desperately looking for a SPICE model of the photovoltaic
  isolator PVI-1050N from International Rectifier. I asked their
  support desk but got a negative answer. Has anyone built such a
  model? Or is it possible to build one using the information given

For all you suckers supporting the war in iraq. Check and see what a
real war is
http://www.wildfirejo.org.uk/feature/display/114/index.php

I guess the only person who'll know this for sure is Mike E.,
hopefully he'll respond.
I have two recent installations of LT Spice; one on my desktop and one
on my laptop; each downloaded seperatel from Linear's site. The only

I need to get something halfway decent to make mechanical drawings, of
things like chassis, faceplates, assemblies, PCB's.  Been using Visio,
because it's what I have at hand, but it's just awful when it comes to
getting accurate dimensions, trying to make precise radiused corners, ...

Returning to this subject with the specific beef I have now. This
example comes from Chris Bowick's book, RF Circuit Design.
See the LT schematic file posted to a.b.s.e. under the same subject
title as this.

I just started with the Eagle pcb sw, and I have a few questions:
- how to place smd components to the bottom layer?
- how to "unroute" the autorouted board? (I mean remove all of the tracks)

I'm convinced that an XP update has broken pspice.  The fault is
always in the same module, same dll.  Results are the same with 9.2.3
and 10(SP1.1).  Same with different sch file that has run ok, on XP,
with 9.23.  Re-installs do not fix.   Transient runs are ok.  Problem

I'm running Pspice 9.2.3 on XP home and doing a large Monte Carlo.  At
some random point pspice comes up with RPC server unavailable.  This
only happens after a couple of hours of Pspice.  Not at any other time
and only with very long runs.  As far as I can find RPC seems to have

Marker tips are just not fine enough for touching up .25 mm or smaller
tracks without having to scrape away the excess, has anyone ever tried a
drafting pen/permanent ink combo for this? If so, any recommendations in
terms of pen and ink? Has to handle both film and bare copper.

Hello people.
Does someone here have any SPICE model for 4046 PLL IC?
Some I've found use PSpice' digital syntax.
[]s

I've seen the following questions asked on job applications:
Are you presently working? and...
May we contact your present employer?
For the first question.....

I am trying to simulate phase noise of a VCO using Hspice and Spice.
How can I do it? Thank you.