I have two signal sources providing the same differential audio signal (VIN1 and VIN2). I want to sum those signals. The result (VOUT) shall also be differential.
The idea is to take a fully-differential op-amp and to sum the inputs just as you would do it in a single ended inverting adder configuration.
Will this work?
A quick LTspice simulation seems to work as expected. However, I could not find any examples on the internet, so maybe I am missing something?