A bipolar differential amplifier as shown in Fig. 7.5 has I_EE= 1 mA. The resistor values and transistor data are as given in Problem 7.1. If the tail current source has an associated resistance_RT= 300 kΩ and capacitance C_T= 2 pF as defined in Fig. 7.11a, calculate the CM and DM gain and CMRR as a function of frequency. Sketch the magnitude of these quantities in decibels from f = 10 kHz to f = 20 MHz, using a log frequency scale. Compare your answer with a SPICE simulation.

Fig. 7.5:

Fig. 7.11 a:

R Ro Cin Vx Vo a,Vx 0+ RL Voc Rs Vic 2 RT