Electronics > Projects, Designs, and Technical Stuff
How can I obtain amplifier circuit loop gain?
<< < (4/6) > >>
Cerebus:

--- Quote from: bson on January 19, 2020, 12:02:33 am ---Vf/Vin, where Vf is the feedback voltage.

--- End quote ---

What question do you think that is an answer to?
Wimberleytech:

--- Quote from: Cerebus on January 19, 2020, 01:47:52 am ---
--- Quote from: bson on January 19, 2020, 12:02:33 am ---Vf/Vin, where Vf is the feedback voltage.

--- End quote ---

What question do you think that is an answer to?

--- End quote ---

You mean.: "To what question do you think that is the answer?"

Anyhooo, it is actually the answer to the title of the original post.
Lucky-Luka:
Apart from the fact that I've already received and answer, how can I obtain Vf?
I don't think that such an answer adds something to the thread.
Maybe you can prove me wrong.
magic:
You can put an "AC 1" source at the normal input of completely unmodified amplifier, run AC analysis and plot V(output)/(V(in+)-V(in-)), where in+,in- are of course the two inputs to the differential pair. Philosophically speaking, that's the open loop gain.

It will give about the same plot, but I suspect that it may be slightly more optimistic at high frequencies and that's why people use other methods to asses stability of the circuit. Or maybe I'm wrong and it will be exactly the same :-//
Lucky-Luka:
It doesn't look good.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod