Home / Questions / The amplifier shown in Figure P829 has a signal source a load and one stage of amplification with
The amplifier shown in Figure P8.29 has a signal source, a load, and one stage of amplification with
RS = 2.2 k2 R1 = 1 k2
RF = 8.7 k2 RL = 20 2
Motorola MC1741C op-amp:
ri = 2 M2 ro = 25 2 μ = 200,000
In a first-approximation analysis, the op-amp parameters given above would be neglected and the op-amp modeled as an ideal device. In this problem, include their effects on the input resistance of the amplifier circuit.
Vbatt
_
+
v1(t)
vout(t)
a. Derive an expression for the input resistance vi/ii
including the effects of the op-amp.
b. Determine the value of the input resistance including the effects of the op-amp.
c. Determine the value of the input resistance assuming the op-amp is ideal.
Figure P8.26
RF
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