Problem 2 (10 points): The schematic of a BJT two-stage op-amp is shown in Fig. 2. (a) Find the small-signal open-loop g

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Problem 2 10 Points The Schematic Of A Bjt Two Stage Op Amp Is Shown In Fig 2 A Find The Small Signal Open Loop G 1 (65.33 KiB) Viewed 21 times

Problem 2 (10 points): The schematic of a BJT two-stage op-amp is shown in Fig. 2. (a) Find the small-signal open-loop gain Ao of the op-amp in terms of small-signal parameters. Assume r4 << Toro2 and that the gain of the output stage is 1. (b) If I were doubled, by what factor would gm1 change? (c) Describe what happens to Ao under each of the following conditions. (i) I1 is doubled (ii) I4 is doubled (ii) I and I are both doubled Vcc AQ3 14 QIA Q2A QIB Q2B Hil = Fig. 2 05 14 16. 26 27. V... out