알렉산더 회로이론 솔루션 ch05 solution, Charles K. Alexander, Matthew N. O. Sadiku - Fundamentals of Electric Circuits_ Solution ch05Manual
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Chapter 5, Problem 1.
The equivalent model of a certain op amp is shown in Fig. 5.43. Determine:
(a) the input resistance.
(b) the output resistance.
(c) the voltage gain in dB.
Figure 5.43 for Prob. 5.1
8x104
vd
Chapter 5, Solution 1.
(a) Rin = 1.5 MΩ
(b) Rout = 60 Ω
(c) A = 8x104
Therefore AdB = 20 log 8x104
= 98.0 dB
Chapter 5, Problem 2
The open-loop gain of an op amp is 100,000. Calculate the output voltage when there are
inputs of +10 µV on the inverting terminal and + 20 µV on the noninverting terminal.
Chapter 5, Solution 2.
v0 = Avd = A(v2 - v1)
= 105
(20-10) x 10-6
= 1V
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