Discuss the below problem:
Q: For the base-current-compensated mirror of Fig. show that the incremental input resistance (seen by the reference current source) is approximately 2VT /IREF. Evaluate Rin for IREF = 100 μA. (Hint: Q3:is operating at a current IE3 = 2IC/β, where IC s he operating current of each of Q1: and Q2:Replace each transistor with its T model and neglect r0.)
