The pnp BJTs Q1-Q2 of Fig. P4.88 form an EC pair with emitter degeneration, the npn mirror Q3-Q4 forms the active load, and the pnp mirror Q5-Q6 provides emitter bias for the EC pair. Let the BJTs...

The pnp BJTs Q1-Q2 of Fig. P4.88 form an EC pair with emitter degeneration, the npn mirror Q3-Q4 forms the active load, and the pnp mirror Q5-Q6 provides emitter bias for the EC pair. Let the BJTs have VBEn 5 VEBp 5 0.7 V, VCEn(EOS) 5 VECp(EOS) 5 0.3 V, 0p, 5 200, and VAn 5 1.5VAp 5 75 V. (a) Find Rid, Ro, adm, and CMRR.

(b) If the input terminals are tied together and driven by a common voltage vIC, what is the permissible input voltage range? What is the permissible output voltage range for vIC 5 0 V? (c) What are the advantages/disadvantages of using emitter degeneration for the differential pnp pair in this circuit?