Section 10.7 Op Amp AC Circuits
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Section 10.7 Op Amp AC Circuits
10.69 For the integrator shown in Fig. 10.112, obtain Vo∕Vs. Find vo(t) when vs(t) = V*m* sin ωt and ω = 1∕RC.
Figure 10.112 For Prob. 10.69.
10.70 Using Fig. 10.113, design a problem to help other students better understand op amps in AC circuits. 10.74 Evaluate the voltage gain Av = Vo∕Vs in the op amp circuit of Fig. 10.117. Find A*v* at ω = 0, ω → ∞, ω = 1∕R1C1, and ω = 1∕R2C2.
10 kΩ
Vo +
20 kΩ
i o
‒ +
‒
‒
6 30° V ‒j2 kΩ
‒j4 kΩ
10.75 In the op amp circuit of Fig. 10.118, find the closed‑ loop gain and phase shift of the output voltage with respect to the input voltage if C1 = C2 = 1 nF, R1 = R2 = 100 kΩ, R3 = 20 kΩ, R4 = 40 kΩ, and ω = 2000 rad/s.
vs vo
R2
C2
R1
R4
‒
R3
‒ +
C1
- ‒
Figure 10.118 For Prob. 10.75.
10.77 Compute the closed‑loop gain Vo∕Vs for the op amp circuit of Fig. 10.120.
10.78 Determine vo(t) in the op amp circuit in Fig. 10.121 below.
10.79 For the op amp circuit in Fig. 10.122, obtain Vo.
For Prob. 10.79.
10.80 Obtain vo(t) for the op amp circuit in Fig. 10.123 if vs = 12 cos(1000t − 60°) V.
Figure 10.123 For Prob. 10.80.
10.81 Use PSpice or MultiSim to determine Vo in the circuit of Fig. 10.124. Assume ω = 1 rad/s.
Figure 10.124 For Prob. 10.81.
10.82 Solve Prob. 10.19 using PSpice or MultiSim.
10.83 Use PSpice or MultiSim to find vo(t) in the circuit of Fig. 10.125. Let is = 2 cos(103 t) A.
Figure 10.125
For Prob. 10.83.
i
10.84 Obtain Vo in the circuit of Fig. 10.126 using PSpice or MultiSim.
Figure 10.126
For Prob. 10.84.
10.85 Using Fig. 10.127, design a problem to help other students better understand performing AC analysis with PSpice or MultiSim.
Figure 10.127 For Prob. 10.85.
10.86 Use PSpice or MultiSim to find V1, V2, and V3 in the network of Fig. 10.128.
Figure 10.128 For Prob. 10.86.
C
+ + Vo ‒ ‒
R R1
R2 R
C
10.88 Use PSpice or MultiSim to find vo and io in the circuit of Fig. 10.130 below.
Figure 10.132 For Prob. 10.90.
Vi