Tool/software:
What are the standard methods for measuring operational amplifier loop gain and generating Bode plots?
Please help provide the test method or simulation schematic. Technical documentation references would be appreciated.
Regarding the attached circuit, could it be adapted to measure operational amplifier loop gain?
Hi Bruce,
The attached circuit is configured as an comparator (without a negative feedback). So the loop gain is Aol, which is very large.
Here is an example of loop-gain analysis.
LM324 Loop Analysis 06062025.TSC
TI's loop gain analysis is done slightly different, but the theory is the same, see the video link below.
https://www.ti.com/video/series/precision-labs/ti-precision-labs-op-amps.html
If you have other questions, please let me know.
Best,
Raymond
