.61 The differential amplifier circuit of Fig. P9.61 utilizes a resistor connected to the negative power supply to establish the bias current I.
(a) For vB1 = vid/2 and vB2 =-vid /2, where vid is a small signal with zero average, find the magnitude of the differential gain,/vo/vid / (b) For vB1 =vB2 =vicm, where vicm has a zero average, find the magnitude of the common-mode gain, / vo/vicm /
(c) Calculate the CMRR. (d) If vB1=0.1 sin 2π ×60t +0.005 sin 2π ×1000t, volts, and vB2 =0.1 sin 2π ×60t-0.005 sin 2π ×1000t, volts
(d) If vB1 =0.1 sin 2π ×60t +0.005 sin 2π ×1000t, volts, and vB2 =0.1 sin 2π ×60t-0.005 sin 2π ×1000t, volts, find vo
