Consider the multistage bipolar circuit in Figure P11.90, in which dc base currents are ne...

Consider the multistage bipolar circuit in Figure P11.90, in which dc base currents are negligible. Assume the transistor parameters are β = 120, VBE (on) = 0.7 V, and VA = ∞. The output resistance of the constant current source is Ro = 200 kΩ. (a) For υ1 = υ2 = −1.5 V, design the circuit such that υO2 = υO =0, ICQ3 = 0.25 mA, and ICQ4 = 2 mA. (b) Assuming CE acts as a short circuit, determine the differential-mode voltage gains Ad1 = υo2/υd and Ad = υo/υd. (c) Determine the common- mode gains Acm1 = υ02/ υd and Acm = υo/υd, and the overall CMRRdB.