Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Free SPICE simulator..
Free SPICE simulator..
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th June 2002, 05:32 PM   #21
Aud_Mot is offline Aud_Mot
diyAudio Member
 
Join Date: Apr 2002
Location: California
HAVE A LOOK AT THIS

A free lite version of a pretty good, reasonably priced, and full featured SPICE program.

They also have a 30 day trial for their professional verision.

They have export to popular PCB layout programs.

If you are reading this thread, you should have a look.

http://www.beigebag.com

Aud_Mot
  Reply With Quote
Old 1st July 2002, 08:19 PM   #22
HarryHaller is offline HarryHaller  United States
Banned
 
Join Date: Feb 2002
Location: Dallas,Texas
Thumbs up Simetrix Intro

I have looked at about 6 or 7 of the "freeware" versions of Spice and this may be the best for simple amplifier design. It seems to be able to read models from other Spice programs which is really nice. If the circuit limits prove large enough this maybe the one to use for the serious DIYer. It also seems to be the one of the easiest to use with lots of examples. If there is enough interest I may provide some circuit files and or parts libraries. Any feedback from experienced users of the freeware Intro version?

http://www.newburytech.co.uk/Pages/download.html


H.H.
  Reply With Quote
Old 1st July 2002, 09:03 PM   #23
Geoff is offline Geoff  United Kingdom
diyAudio Member
 
Join Date: Apr 2001
Location: UK
HH

Feedback? Yes, I have been using SIMetrix Intro for two years now and have found it to be superior to all other 'free' simulator software. My only concern, that I have yet to resolve, is that open-loop bode plots for amplifiers with a known (measured) stability margin indicate either insufficient or no phase margin.

Geoff
  Reply With Quote
Old 1st July 2002, 09:29 PM   #24
rtirion is offline rtirion
diyAudio Member
 
Join Date: Nov 2000
I have been using simetrix v4.0 and v4.1 for about a year now and found the same problem as Geoff. Bode plots for various amplifiers indicate insufficient phase margin. I am struggling with this for over 3 months now , and I have still no solution, or explanation. Could it be that ''AC analysis is for small signals only'' is the cause of this "problem"?
Nevertheless I think it is a very good piece of software.
I used a very old MicroCap v3 for DOS more than three years and tried and abandoned EWB's MultiSim.
  Reply With Quote
Old 1st July 2002, 09:33 PM   #25
HarryHaller is offline HarryHaller  United States
Banned
 
Join Date: Feb 2002
Location: Dallas,Texas
Smile SIMetrix Intro

Is you discrepency with phase margin with Spice in general, SIMetrix Intro in particular. I am also interested in which other Spice programs you have tried. Have you tried running the same bench mark circuit on different simulation programs and had different phase results. Thanks for your feedback and I am very impressed with my limited experience with SIMetrix Intro and the GUI is very friendly in comparison with some others.

H.H.
  Reply With Quote
Old 1st July 2002, 10:14 PM   #26
Geoff is offline Geoff  United Kingdom
diyAudio Member
 
Join Date: Apr 2001
Location: UK
H.H.

I tried most, if not all, of the free simulation programs about 2 years ago before settling on SIMetrix Intro. I cannot remember any phase margin errors with the other programs, but my memory is not what it used to be. Anyway, at that time, I had less knowledge of Spice and stability criteria so may have missed a problem had it existed.

I have not found any discrepancies when using op-amp models, only with discrete circuits. Discussions with Rod Elliott, who also uses SIMetrix Intro, have revealed that he has experienced the same problem.

If anyone can offer suggestions as to the possible cause, I would be glad to hear them. Or, better still, if someone has access to two simulator programs, including SIMetrix, could they please run an open-loop Bode plot using a simple circuit (say the ESP 3A) and compare the results.

I have been meaning to write to Newbury Tech on this matter for some time now, but I will hold fire pending any feedback in this thread.

Geoff
  Reply With Quote

Reply


Free SPICE simulator..Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Spice simulator engines rtarbell The Lounge 1 26th July 2007 11:17 AM
Free Spice Or Cheap Spice Simulator-Where To Start? kelticwizard Everything Else 29 15th February 2007 01:38 AM
please recommend free spice software knifeinthesink Parts 2 26th October 2006 03:06 AM
Spice/simulator lumanauw Everything Else 5 24th January 2004 08:53 AM
Free Spice demo pinkmouse Software Tools 0 10th February 2003 06:34 PM


New To Site? Need Help?

All times are GMT. The time now is 09:20 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki