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Step 9.061P Refer Figure P8.62 in the textbook (a) Draw the circuit with notations + + 0.7 V 0.7 V Figure 1 Step 2 of 7 Apply Kirchhoff's voltage law to left side 4.3 4.3x10 mA Calculate the value emitter current 2 =0.5 mA Step 3 of 7 Calculate the value of small signal emitter resistance E Substitute 25 mV for V, and 0.5 mA for =50 Ω Q Calculate the value of small signal differential voltage gain, Substitute for a for and for Rc 2(50) Therefore, the differential gain 20 V/V Step 4 of 7 (b) Draw the circuit diagram with common mode input - - Vicm 2R, 2 Biased at 2 Figure 2 Step 5 of 7 The expression for the common mode voltage 2RE Substitute for for and for Rc 8.65x10 =0.23 V/V the common-mode gain is 0.23 V/V Step 6 of 7 (c) Calculate the value of common-mode rejection CMRR Substitute 0.23 V/V for and 20 V/V for 20 CMRR 0.23 =20(1.94) =38.8 dB Therefore, the common-mode rejection ration 38.8 dB Step 7 of 7 (d) Calculate the output 2 Substitute sin sin for and sin for (20) 0.23 + Therefore, the output voltage V