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

Solid State Talk all about solid state amplification.

SPICE Amplifier Simulation
SPICE Amplifier Simulation
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
Thread Tools Search this Thread
Old 27th November 2001, 02:38 PM   #11
tschrama is offline tschrama  Netherlands
diyAudio Member
Join Date: Jul 2001
Location: The Netherlands
Hi .....

I'm also very interested in the circuit analysis stuff... so I also simulate a lot in SPICE... and indeed it is very handy .. but I also get some results that just cannot be true... like the push-pull MOSFET simulations .... the complementairy MOSFET devices are just to simple simulated and thus you get results you cannot depend on .... but heee that's a fun game too... to improve your SPICE simulation...:-)

  Reply With Quote
Old 27th November 2001, 02:54 PM   #12
ergo is offline ergo  Estonia
diyAudio Member
Join Date: Mar 2001
Location: Tallinn, Estonia

Try the 'text' mode (lower left corner). Micro-Cap accepts the standard SPICE models you can get from manufacturers web pages etc. In that way you will get much more precise models. It still ain't same as in real world but should get you much closer.... It helps to have an idea of the theory behind text mode SPICE models and how to configure them in text mode.

I too believe that the simulator is good for evaluation of dc modes and operating point confirmation, but the measurement and most importanly for audio, listening, is still better done in real world.

  Reply With Quote
Old 27th November 2001, 04:06 PM   #13
jduncan is offline jduncan  United States
diyAudio Member
Join Date: Nov 2001
Location: Boston, MA, USA
Send a message via AIM to jduncan
Great software for doing Chematics AND PCBs is:

Protel SE 99 (www.protel.com)

but be warned, its not cheap!

they do, however, have a fully functional, free, 30 day trial so check it out.
  Reply With Quote
Old 17th December 2001, 03:07 AM   #14
Silverpike is offline Silverpike
diyAudio Member
Silverpike's Avatar
Join Date: Dec 2001
Location: San Jose, CA
Question spice models for lateral mosfets

Hello all, this is my first post on this forum. I also wanted to say that this is quite possibly one of the coolest places I have found yet for audio.

My question related directly to this thread. alaskanaudio and ergo, you seem to indicate that you have MOSFET models for simulation. Are they lateral MOSFETs? I have looked everywhere, and nobody seems to have any models pre-made for lateral MOSFETs (e.g. 2sj162/2sk1058, buz900p/buz905p, or ecx10p16/ecx10n16).

Worse yet, the MOSFET template I have for my simulator, PSPICE, seems to be geared toward vertical MOSFETs. The template curves aren't the same as the lateral FETs, and I can't seem to change certain params to get the graphs to come out right. So even when I try and make my own models, that doesn't work .

I appreciate that fact that everyone likes their simulators, but I really don't want to change from the one I use now. Can anybody give me some helpful info? Even some documentation would be welcome. I believe it is also possible to code the model in text mode using custom equations, but I really want to avoid that route if at all possible.

FYI, I want this for a specific amp design I am building. This design uses lateral MOSFETs, which, given that this is my first project, I would really rather not deviate from.

Thanks in advance, and I hope everyone is gearing up for an enjoyable holiday season!
  Reply With Quote
Old 17th December 2001, 04:19 AM   #15
alaskanaudio is offline alaskanaudio  United States
diyAudio Member
Join Date: Sep 2001
Location: Fairbanks, Alaska

I received some lateral MOSFET models from Magnatec for the BUZ series that they have and also from Exicon for the devices they market.

They do not list them as being availble on their web sites. Send them a email request and they will send them to you.

John Fassotte
Alaskan Audio
  Reply With Quote
Old 1st February 2002, 07:06 PM   #16
Mundi is offline Mundi
diyAudio Member
Join Date: Feb 2002
Location: Oakton Virginia
Default Spice Models- Where?

I'm attempting a Spice simulation of a Leach Amp. However, I am missing models for the following devices. I have been searching the manufacturers' sites and came up empty. Does anyone know where to get them? I am using Simetrix 4.0, which uses Spice3 models or HSPICE .MOD files.

  Reply With Quote
Old 2nd February 2002, 05:19 AM   #17
dshortt9 is offline dshortt9  United States
diyAudio Member
dshortt9's Avatar
Join Date: Apr 2001
Location: Milwaukee, Wisconsin
Default BUZ Lateral Mosfet availability

Users of BUZ900 series MOSFETS

Martinez & Associates,Inc. is pleased to announce that we have been
the sole US distributors for Magnatec's Lateral MOSFET product Line.

We can be reached at:

Martinez & Associates, Inc.
234 Boston Post Road
Wayland, MA 01778
Tel: (508) 358-0131
Fax: (508) 358-2361
email: john@martinezandassoc.cnchost.com

We accept payment by check or VISA, Mastercard, Discover and American
Express credit cards.

We appreciate your interest in Magnatec.

John E. Martinez

I have succesfully purchased BUZ mosfets from them, and obtained spice models.
  Reply With Quote
Old 4th February 2002, 08:16 PM   #18
Mundi is offline Mundi
diyAudio Member
Join Date: Feb 2002
Location: Oakton Virginia
I emailed ON Semiconductors and was told they do not supply Spice models for these devices .
  Reply With Quote
Old 4th February 2002, 08:53 PM   #19
Geoff is offline Geoff  United Kingdom
diyAudio Member
Join Date: Apr 2001
Location: UK

Spice models for the MJ15001 and MJ15002 are available from the ONSemi website. For the other MJ/MJE devices you will probably need to use a model from the ONSemi site for a generally similar device. There are several sites on the web with a model for the 1N400x series diodes and the 1N4148. Can't help with the other transistors as I have not had a need to look for these.

  Reply With Quote
Old 4th February 2002, 09:32 PM   #20
traderbam is offline traderbam  Europe
diyAudio Member
traderbam's Avatar
Join Date: Jan 2002
Location: Earth
I've used Spice a few times and found it helpful to get a rough idea of what is going on in a circuit and specifically to predict what the "ideal" circuit ought to perform like. I use this to compare with what it actually does in order to help track down the causes of the differences. This is very useful.

Like Nelson I would be shy to use it to make really accurate predictions. It's one of those garbage in garbage out situations. The simulation is ignorant of a lot of real-world stuff like lead inductance, stray capacitances, ground line resistances, parasitics and real life psus. You could attempt to include models for all of this but your life would be over before you completed them! I believe some simulators allow you to run Monte Carlo sims on the component parameters.
  Reply With Quote


SPICE Amplifier SimulationHide 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
Need help with Spice simulation overmind Everything Else 4 23rd December 2002 04:58 PM

New To Site? Need Help?

All times are GMT. The time now is 02:20 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio