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3 A BJT amplifier with active load is shown in Figure P10.83. The cir- cuit contains emitter resistors RE and a load resistor Ri. (a) Derive the expression for the output resistance looking into the collector of Q2 (b) Using the small-signal equivalent circuit, derive the equation for the ogulrno minilir t Equation (10.94). RE RE 02 01 O vo REF ZR, Figure P10.83

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