How to make sure the 2-stage opamp is stable? How does the compensation work?

Question

Anonymous · Accepted Answer

Use compensation capacitor. Look up pole splitting which uses Miller effect on the capacitor.

Karthik Tripurari · Answer

Using Miller compensation. A compensation capacitor across the 2nd stage to create pole splitting. A series resistor to the cap might be needed to solve the rhp zero problem

Anonymous · Answer

Using compensation capacitor, which makes the low frequency pole's frequency become lower and high frequency pole's frequency higher, so OPmap is more stable.

Anonymous · Answer

Using compensation network including capacitor and resistor and monitoring the phase margin and gain margin as well.

sowndharya k · Answer

By constructing current mirror circuit using op-amp 741 through compensation resistor at the feedback side. Finally the input and output of the op-amp gets compensated.

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