Where to inject small signal for average current mode control

Thread Starter


Joined May 22, 2019

In average current mode control to check the loop gain, phase and crossover freq. a small signal is injected before the feedback resistors of the output voltage sensor.

If I want to see what the cross over frequency of the current loop is, with respect to the cross over of the outer loop, how do I do that?

I need to have my inner current loop twice the cross over frequency of my outer voltage loop, but I can't seem to find a way to give me an accurate result of where to place the small signal 1V source.

I can't seem to find anywhere online that shows how to do this, just has a small signal in the outer loop and that's it.

Am I missing something, maybe?
I have attached an image for illustration, of where i currently have the signals placed,.