[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Help-gnucap] newby problems

From: al davis
Subject: Re: [Help-gnucap] newby problems
Date: Sun, 15 Jul 2012 20:45:31 -0400
User-agent: KMail/1.13.5 (Linux/2.6.32-5-amd64; KDE/4.4.5; x86_64; ; )

On Sunday 15 July 2012, marty moore wrote:
> I'm running gnucap 0.35 on debian 6 with emacs 23.

I see a number of issues ..

The version you are using (0.35) is not the latest .. try the 
snapshot 20091207 .. it has a lot of fixes relative to 0.35.

You didn't say anything about the model .. it's some "X1" but 
that is all I can see.

But the real problem is that your circuit doesn't work.  You 
have an op-amp with only a capacitor for feedback, and sometimes 
the inverting input has no DC path to ground.

You might think that the simulator should show something like 
what a real circuit might do .. output goes full + or full - .. 
I'm not sure which.  What happens here is dependent on the model 
you use for the op-amp.  Many of those models do not handle this 
kind of situation correctly.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]