[40% ] Consider an op amp having a single-pole, open-loop response with A, -10 and f-10 Hz. Let the op amp be ideal otherwise (infinite input impedance, zero output impedance, etc.). If the op amp wired as a unity-gain buffer, how large is b? (2) At what frequency the loop gain Aß is equal to 1? What is the corresponding phase margin? For the case of a manufacturing error introducing a second pole at 10' Hz. Sketch the bode plot of the open loop gain. What is now the frequency for which Ab-17 What is the corresponding phase margin? For what values of ß is the phase margin 45° or more?

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