8.49 Transistor Q1 in Fig. P8.49 is operating as a CE amplifier with an active load provided by transistor Q2, which is the output transistor in a current mirror formed by Q2 and Q3. (Note that the biasing arrangement for Q1 is not shown.)
(a) Neglecting the finite base currents of Q2 and Q3, and assuming that their and that Q2 has five times the area of Q3, find the value of I.
(b) If Q1 and Q2 are specified to have |VA| = 20 V, find ro1 and ro2 and hence the total resistance at the collector of Q1.
(c) Find rπ1 and gm1 assuming that β1 = 50.
(d) Find Rin, Av, and Ro.