cs) Consider the bipolar cascode amplifier of Fig. 1. a) The cascode amplifier of Fig. 1 is biased at a current of 0.2 mA. Assuming that npn transistors have ß

= 100 and VA = 5 V and that pnp transistors have ß = 50, |Va[ = 4 V,and VT = 25 mV (for both npn and pnp), find Ron, Rop, and Ay. (b) Find an expression for the maximum voltage gain achieved in the amplifier. (c) Use the result of section (b) to determine the maximum achievable gain.