Problem 1. CMRR of Differential Amplifiers [8 points] VOD J J RD Ro+ARD Vo- Vo+ M M2 +vd/2 -Vd/2 Vc VB4 M4 Vc VB VB3 M3 VB Fig. P1 All transistors are in the saturation region; the transconductances of M1, M2, M3 and M4 are gml, gm2, gm3 and gm4, respectively; the output resistances of M1, M2, M3 and M4 are rol, 102, 103, and 104, respectively. Also, gm1 = gm2 and ro1 = ro2 >> Rp. The tail current source of this differential amplifier is implemented in the cascode structure (M3 and M4), and the load resistors have a very small amount of mismatch, ARD (<
