Valid opamp circuit?

[Citizen124032]

Maybe better?

You're upto something the short way - dead end most often.

 

[JMFahey]

Didn't read all the thread but it scratches me the wrong way.

I would connect each OpAmp output to its own inverting input, period, and then mix outputs with individual resistors, leaving said resistors outside the NFB loop.

 

[rayma]

Yes, as in post #5. Resistors within the nfb loop are not helpful.

 

[diyralf]

Yes, as in post #5. Resistors within the nfb loop are not helpful.

I can't agree 100% with that. If you need a zero impedance output, then this is a solution.

 

[Mark Tillotson]

I would suggest this:

 

[diyralf]

I would suggest this:

"Mother's little helper", but without -3dB noise attenuation. ;-)

 

[Mark Tillotson]

But with lower output impedance, which might matter if needing to drive low impedance loads - think damping factor...

 

[UniQ]

How about just add a fairly large sized capacitors to the feedback node so that its in-audio-band would allow for a low output impedance while its effect when going towards DC would diminish so that any DC offset wouldn't cause any high current draw and overheating.

 

[MarcelvdG]

Could you draw what you have in mind?