[sdiy] LTSpice for large circuits?

[Barry Klein]

As LTSpice is free I encourage you to use it so that all of us could share
simulations of various circuits...  Although, that is not as simple with
LTSpice as one would think.  Complicated file structure.

Barry


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of JH.
Sent: Thursday, April 01, 2010 9:29 AM
To: Neil Johnson; synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] LTSpice for large circuits?

Thank you Neil, and thanks to everybody else who answered.
I think I'll stick with LT Spice.
The user interface is much better than I thought when I first tried it a few
months ago - actually better than PSpice is some way 
...

JH.


----- Original Message ----- 
From: "Neil Johnson" <neil.johnson97 at ntlworld.com>
To: "JH." <jhaible at debitel.net>; <synth-diy at dropmix.xs4all.nl>; "Jay
Schwichtenberg" <jays at aracnet.com>
Sent: Thursday, April 01, 2010 6:22 PM
Subject: Re: [sdiy] LTSpice for large circuits?


Hi,

Jay Schwichtenberg <jays at aracnet.com> wrote:
> I don't think doing a vocoder in full would be practical (don't know about
> the component limits). Might be pretty fast when we get 8 core, quad
> processor systems if the SW is written for threading.

For a quick test I strung 128 LT1022 op-amps in a long chain.  It simulates,
but rather slow (about 1us/s).  And this on a quad-core 
2.67GHz machine with 3GB RAM, and all four cores close to 100%.

So, no I don't think there's any limitation as such.  This is for
LTSpice-IV.

One feature I *do* like about LTSpice is the ability to read and write WAV
files - I used this feature when designing my all-pass 
filter to get a feel for how it might treat real audio rather than generated
waves.

Neil
--
http://www.njohnson.co.uk



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