Response to the following problem:
Transistor Q1: in the circuit of Fig. is operating as a CE amplifier with an active load provided by transistor 2 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 VBE ?0.7 V and that Q2: has five times the area of Q3: find the value of I.
(b) IfQ1: andQ2: are specified to have /VA / =30 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.
