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Engineering and Tech / Electric Circuits 10 / Chapter 5 / Problem 5.48

Electric Circuits | 10th Edition | ISBN: 9780133594812 | Authors: James W Nilsson

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The op amp in the noninverting amplifier circuit of Fig.

Chapter 5, Problem 5.48

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QUESTION:

The op amp in the noninverting amplifier circuit of Fig. P5.48 has an input resistance of 560 k an output resistance of 5 k and an open-loop gain of 50,000. Assume that the op amp is operating in its linear region. a) Calculate the voltage gain (v/vg). b) Find the inverting and noninverting input voltages vn and vp (in millivolts) if vg = 1V c) Calculate the difference (vp - vn ) in microvolts when vg = 1V d) Find the current drain in picoamperes on the signal source vg when vg = 1V e) Repeat (a)(d) assuming an ideal op amp.

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QUESTION:

The op amp in the noninverting amplifier circuit of Fig. P5.48 has an input resistance of 560 k an output resistance of 5 k and an open-loop gain of 50,000. Assume that the op amp is operating in its linear region. a) Calculate the voltage gain (v/vg). b) Find the inverting and noninverting input voltages vn and vp (in millivolts) if vg = 1V c) Calculate the difference (vp - vn ) in microvolts when vg = 1V d) Find the current drain in picoamperes on the signal source vg when vg = 1V e) Repeat (a)(d) assuming an ideal op amp.

ANSWER:

Step 1 of 7

The equivalent circuit of the amplifier.

Part (a)

Apply the KCL at node

Apply the KCL at node

From the circuit,

Solve the equation further as

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