Irwin 9e 4 4, Lecture notes of Technical Writing

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2014/2015

Uploaded on 07/18/2015

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Irwin, Basic Engineering Circuit Analysis, 9/E 1 4.4 For an ideal op-amp, the voltage gain and input resistance are infinite while the output resistance is zero. What are the consequences for (a) the op-amp’s input voltage? (b) the op-amp’s input currents? (c) the op-amp’s output current? SOLUTION: (With mpmite ga , an input voltage of Zo will produce @ finite output voltage , Vin = OV and uk Vin ua adinite Values the Vout = f°" (b) No nput curaont flows ; Rin = co clin = OA © With Rays 0 2 , Fhe output cursent a Limised only by external cinaut vasuichles, Chapter 4: Operational Amplifiers Problem 4.4