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Step of 5 9.080P Draw the following circuit diagram; +Vcc Rc Rc - + Rₛ + Rₛ 2 2 Q₁ B1 B2 - - I I I + 2 2 2 2 Figure 1 Step of The emitter currents due to mismatch are, 22 2 2 The base currents are, 2 = Step of 5 Apply Kirchhoff's voltage law at the input side. 2 2 1 I Substitute for for for and for 2 22 22 1 1 2 2 2 2 2 AIRs 1 22 2 2 4 4 2 B+1 2 4 4 1 2 2 2 (B+1) = Step of Calculate the expression for Substitute for Calculate the expression for differential voltage gain, Calculate the expression for the input offset voltage, Ad Step 5 Substitute for and for Ad I = = = Thus, the expression for overdrive voltage, is proved.