[SOLVED] How to measure OPAMP DC Gain

[movinghoon96]

Hello, I want to measure DC Gain for general 2-stage opamp.

It is showing something like hysteresis, 106mV for Input : Low->High, 58mV for Input : High -> Low

So adding 1 mV Source to input was not successful.

Also, I tried following link

https://www.analog.com/en/resources/analog-dialogue/articles/simple-op-amp-measurements.html

but simulation failed, it said need more strict time interval.



I think offset can be compensated by adding voltage source, but what can i do for hysteresis?

 

[sidun.av]

Hi @movinghoon96 ,
Please, provide your schematic and simulation setup, it's very hard to understand what is the problem exactly.
In general, DC gain can be measured by using ac/stb analysis in ADEL.

 

[movinghoon96]

Hi @movinghoon96 ,
Please, provide your schematic and simulation setup, it's very hard to understand what is the problem exactly.
In general, DC gain can be measured by using ac/stb analysis in ADEL.

I failed with AC sim, but anyway successed with STB sim. Thank you