/diy/ - Do It Yourself

>build strange op-amp circuit
>effectively open-loop feedback, V+ ≠ V-
>keeps clinging to one rail or the other
>output is unpredictable and useless
I don't know what I expected, but at least it gave me some inspiration.
So you know clipping circuits, which trim the upper and lower parts of a waveform, how about a circuit that does the opposite? Squeeze the middle of the waveform down to ground and only the peaks show. Picrelated. I think an 2-diode exponential amplifier with an attenuation stage would approximate this.