Electronics > Beginners

opamp simulation

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Jay_Diddy_B:
See attached model.

You need to take the inputs off ground. You can't amplify a negative signal.

Regards,
Jay_Diddy_B

Jay_Diddy_B:
For the loop response. Use this model.

You will get:




Regards,
Jay_Diddy_B

Wimberleytech:

--- Quote from: promach on April 13, 2019, 11:58:56 pm ---The mosfet_018.lib is posted in this forum thread. I think third post. Look carefully.

--- End quote ---

I deleted that comment right after posting it.  You saw it before I deleted.

Jay_Diddy_B:
Here is an interesting thing to try.

Step the bias current:



You will see you get higher GBW for higher Ibias.



Regards,
Jay_Diddy_B

promach:
In your opamp_JDB_bode_plt.asc , why DC 0.6V input stimulus for Vin+   ?

And why are you not using large LC for DC feedback ?

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