Find an approximate expression for the bandwidth of the differential amplifier in Fig. P4.31. All transistors are sized identically. Assume the bias voltage is chosen so that all transistors remain in...

Find an approximate expression for the bandwidth of the differential amplifier in Fig. P4.31. All transistors are sized identically. Assume the bias voltage is chosen so that all transistors remain in active mode. How does the bandwidth compare with that of the conventional resistivelyloaded differential pair in Fig. 4.32?