Analog ic design engineer interview questions shared by candidates
How to make sure the 2-stage opamp is stable? How does the compensation work?
Use compensation capacitor. Look up pole splitting which uses Miller effect on the capacitor.
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.
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
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