[sdiy] SPICE and Processors

[Antti Huovilainen]

On Sat, 25 Jul 2009, Ingo Debus wrote:

> Paraphrasing Bob Pease: "It would take you 15 minutes to build that circuit. 
> Why bother with simulation?"
> (that was on a seminar I attended in 2005)

Because it's a lot easier to measure distortion (THD and FFT analysis), 
freq response and temperature sensitivity in simulation :).
Not quite what he meant, but a valid point I think.

You can also rather more easily find the causes of strange behaviour and 
how to fix it. Some time ago I designed a simple two transistor gain stage 
which had a nasty glitch whenever it was overdriven. The cause was 
saturation of the second transistor and was fixed by adding a schottky 
diode. Finding the cause was easy to find when you could simultaneously 
plot voltage and current at several points in the circuit.

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova