(b) Figure Q3(b) is a Differential Amplifier circuit that connected with Constant- Current Source circuit. Explain briefly the use of Constant-Current Source circuit in the Differential Amplifier circuit. Then, perform the DC and AC analyses by determine the VE, IE, Icı, Icz, Rc, re, Vci, Vcz, Fit, F2, Ac and CMRR (dB). Given R1 = 2.5 kQ, R2 = 800 2, R3 = 500 Q, AD = 480, +Vcc =+24 V and -VEE = -24 V. + Vcc la Rc Rc B1 = B2 = 80 Vọ1 Vo2 Vi1 Vi2 Q1 Q2 Constant-Current Source Circuit VE ro = 80 ko B3 = 80 R2 3 R1 R3 -VEE Figure Q3(b)

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