[sdiy] TL07x as output stage?

[Synovatron]

The open loop output impedance in conjunction with any load capacitance forms a pole which further rotates the feedback phase into instability. The same goes for when you put an output resistor in the feedback loop. 

There are some great teaching videos on YouTube from Analogue Devices called 101 whiteboard series; the one on stability explains this so well. In fact check out all the 101 series topics. 

Cheers
Tony
Synovatron

Sent from my iPhone

> On 26 Feb 2016, at 05:27, rsdio at audiobanshee.com wrote:
> 
> Complaining about the open loop output impedance is rather strange, because I can't imagine any reason to design a line-level output stage with an open loop. The impedance will be controlled by the feedback, so it will be different. Am I missing something?