[sdiy] LTSpice for large circuits?

[JH.]

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