EE 2950 Chapter : Chapter 14
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B (c) similarly (d) in part (a) we found that the output voltage is independent of the load resistance. Direct application of circuit laws gives v i . From the previous three equations, we obtain v. 55irvo applying circuit laws gives v i . These equations yield vo using the fact that v . From the circuit, we can write invvf v i . From these equations, we find that v in i: r. Then because io is independent of rl, we conclude that the output impedance of the amplifier is infinite. Also rin is infinite because iin is zero. Using the above equations we eventually find that v. 1 (b) substituting the values given, we find av = 131. (c) because iin = 0, the input resistance is infinite. (d) because vav inv o is independent of rl, the output resistance is zero. From these equations, we eventually find v o.
