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Exercise 4.10.7R3R2Rs(а)Relate vo in the circuit above to vs.

Question
Assume that even though the supply voltages are not shown, the op-amp remains in the linear region of operation.
Exercise 4.10.7
R3
R2
Rs
(а)
Relate vo in the circuit above to vs.
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Exercise 4.10.7 R3 R2 Rs (а) Relate vo in the circuit above to vs.

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Step 1

Input impedance of an opamp is infinite. Therefore, current cannot flow inside the opamp. Currents can only flow through the outer circuits. Also, due to virtual short circuit property of opamp, the voltage of the positive and the negative input termnals will be same.  

Step 2

The given circuit is redrawn and it is shown here:

R3
R2
V2
Rs
Op amp
+
М
Vo
RI
Op amp 2
i,
| 8 +
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R3 R2 V2 Rs Op amp + М Vo RI Op amp 2 i, | 8 +

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Step 3

Applying virtual short circuit property to op amp 1 and o...

01=->(1)
1 0 (2)
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01=->(1) 1 0 (2)

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