Re: gEDA-user: ideal op amps in gschem

[Hal2000 <carzrgr8@xxxxxxxxxxxxx>]

Hal2000 wrote:

> OK, I didn't look ahead for the answers - but here's what I think:
>
> 1.  It's a frequency dependent load. At low frequency, the load on Vin 
> is R2.  At high frequency, the load is 0.
>
> 2. If gain is 100, then you can no longer assume V+ equals V-, and the 
> circuit won't work the same.  The assumption comes from Vout = Aol (V1 
> - V2), when Aol is large (10^4), Vout/Aol can be ignored and V1 = V2.
>
> 3.  not sure
>
> 4. also not sure and I'm getting sleepy :-)
>
> gene
one correction - the load at large frequencies is low, not 0 ohms.  In 
other words, at large F, the load is infinite.  This looks a lot like an 
inductor.