Response to the following problem:
Consider the current-mirror-loaded MOS differential amplifier of Fig. (a) in two cases:
(a) Current source I is mplemented with a simple current mirror.
(b) Current source I is implemented with the modified Wilson current mirror shown in Fig. (b). Recalling that for the simple mirror RSS = ro/ QS and for the Wilson mirror RSS ?gm7ro7ro5, and assuming that all transistors have the same /VA / and k1W/L, show that for case (a)
where VOV is the overdrive voltage that corresponds to a drain current of I/2. For k_W/L =4 mA/V2, I =160 μA, and /VA /= 5 V, find CMRR for both cases.
(b)