Fundamentals of Electric Circuits
6th Edition
ISBN: 9780078028229
Author: Charles K Alexander, Matthew Sadiku
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 5.8, Problem 9PP
Practice Problem 5.9
Figure 5.30
For Practice Prob. 5.9.
Determine vo and io in the op amp circuit in Fig. 5.30.
Answer: 25 V, 100 μA.
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HW_03.pdf EE 213-01 > Assignments
HW_#3
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1) (5 pts) Use node voltage analysis at nodes A and B to determine values for VA, VB, I₁, 12 and 13.
If a current has a negative value, then the reference direction chosen was incorrect and the current
is positive in the opposite direction. Your answer can be the negative value – i.e. you find that 12 =
-1mA. Note, the current through R5 is (VB - 28 Volts)/10K
10K VA
20K VB
10K
R1
12
R2
R5
13
IS1
R3
10 mA
10K
28 V
R4
VS1
5K
-VREF
B
2) (5pts) Use node voltage analysis to find values for the node voltages VA, VR and Vc. Use these
node voltages to determine values for V1, V2, V3, V4, 11, 12, 13, and 14. Hints: V3 = VB and the value
for Vc can be found with no analysis. Dependent current source has a value of gV3 amps
VA
gV3 Amps
14
12
20K
+
V2
-
+
10K
VB
13
V3 10K
-
20K
I₁
V₁ +
Vc
g=5x10-5
20 volts
VREF
3) (5 pts) For the…
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1) (5 pts)For the circuit shown, find the value of Ia, Ib, I¸ and Va:
Ib
10 Ohms
+
Ic
20 Ohms
70 Volts
Va
40 Ohms
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Hint: use KCL to find Ic in terms of la and lb, use KVL around the right loop to find a relationship
between la and lb, use KVL around the outer loop to solve for a current value (use ohms law for
the voltage drops across the resistors)
-
2) (5 pts) For problem 1, show that the power supplied (delivered) by the source equals the
power absorbed by the resistors.
3) (5 pts) Determine the equivalent resistance looking into terminals a-b for the two circuits
shown. Use series and parallel resistor combinations. Hint: work from the opposite end of
terminals a-b towards terminals a-b
a)
24 Ohms
10 Ohms
8 Ohms
a
REQ
b)
b =
75K
5 Ohms
50K
60 Ohms
4 OHMs
20 Ohms
30 Ohms
□ a
20K
8.2K
40K
16K
10K
□ b
7.2K
REQ
Make a LTSpice draws for the design below
Chapter 5 Solutions
Fundamentals of Electric Circuits
Ch. 5.2 - If the same 741 op amp in Example 5.1 is used in...Ch. 5.3 - Repeat Example 5.1 using the ideal op amp model....Ch. 5.4 - Practice Problem 5.3 Figure 5.13 For Practice...Ch. 5.4 - Two kinds of current-to-voltage converters (also...Ch. 5.5 - Calculate vo in the circuit of Fig. 5.20. Answer:...Ch. 5.6 - Practice Problem 5.6 Find vo and io in the op amp...Ch. 5.7 - Design a difference amplifier with gain 7.5....Ch. 5.7 - Obtain io in the instrumentation amplifier circuit...Ch. 5.8 - Practice Problem 5.9 Figure 5.30 For Practice...Ch. 5.8 - If v1 = 5 V and v2 = 5 V, find vo in the op amp...
Ch. 5.9 - Rework Practice Prob. 5.1 using PSpice. If the...Ch. 5.10 - A three-bit DAC is shown in Fig. 5.37. (a)...Ch. 5.10 - Determine the value of the external gain-setting...Ch. 5 - The two input terminals of an op amp are labeled...Ch. 5 - For an ideal op amp, which of the following...Ch. 5 - For the circuit in Fig. 5.40, voltage vo is: (a)6...Ch. 5 - For the circuit in Fig. 5.40, current ix is:...Ch. 5 - If vs = 0 in the circuit of Fig. 5.41, current io...Ch. 5 - If vs = 8 mV in the circuit of Fig. 5.41, the...Ch. 5 - Refer to Fig. 5.41. If vs = 8 mV, voltage va is:...Ch. 5 - The power absorbed by the 4-k resistor in Fig....Ch. 5 - Which of these amplifiers is used in a...Ch. 5 - Difference amplifiers are used in (please check...Ch. 5 - The equivalent model of a certain op amp is shown...Ch. 5 - The open-loop gain of an op amp is 50,000....Ch. 5 - Determine the voltage input to the inverting...Ch. 5 - The output voltage of an op amp is 4 V when the...Ch. 5 - For the op amp circuit of Fig. 5.44, the op amp...Ch. 5 - Using the same parameters for the 741 op amp in...Ch. 5 - 5.7 The op amp in Fig. 5.46 has Ri = 100 k, Ro =...Ch. 5 - Obtain vo for each of the op amp circuits in Fig....Ch. 5 - Determine vo for each of the op amp circuits in...Ch. 5 - Prob. 10PCh. 5 - Using Fig. 5.50, design a problem to help other...Ch. 5 - Calculate the voltage ratio vo/vs for the op amp...Ch. 5 - Find vo and io in the circuit of Fig. 5.52. Figure...Ch. 5 - Determine the output voltage vo in the circuit of...Ch. 5 - (a)Determine the ratio vo/is in the op amp circuit...Ch. 5 - Using Fig. 5.55, design a problem to help students...Ch. 5 - Prob. 17PCh. 5 - For the circuit shown in Figure 5.57, solve for...Ch. 5 - Determine io in the circuit of Fig. 5.58. Figure...Ch. 5 - In the circuit of Fig. 5.59, calculate vo of vs =...Ch. 5 - Calculate vo in the op amp circuit of Fig. 5.60....Ch. 5 - Design an inverting amplifier with a gain of 15.Ch. 5 - For the op amp circuit in Fig. 5.61, find the...Ch. 5 - In the circuit shown in Fig. 5.62, find k in the...Ch. 5 - Calculate vo in the op amp circuit of Fig. 5.63....Ch. 5 - Using Fig. 5.64, design a problem to help other...Ch. 5 - Find vo in the op amp circuit of Fig. 5.65. Figure...Ch. 5 - Prob. 28PCh. 5 - Determine the voltage gain vo/vi of the op amp...Ch. 5 - In the circuit shown in Fig. 5.68, find ix and the...Ch. 5 - For the circuit in Fig. 5.69, find ix. Figure 5.69...Ch. 5 - Calculate ix and vo in the circuit of Fig. 5.70....Ch. 5 - Refer to the op amp circuit in Fig. 5.71....Ch. 5 - Given the op amp circuit shown in Fig. 5.72,...Ch. 5 - Design a noninverting amplifier with a gain of...Ch. 5 - For the circuit shown in Fig. 5.73, find the...Ch. 5 - Determine the output of the summing amplifier in...Ch. 5 - Using Fig. 5.75, design a problem to help other...Ch. 5 - For the op amp circuit in Fig. 5.76, determine the...Ch. 5 - Referring to the circuit shown in Fig. 5.77,...Ch. 5 - An averaging amplifier is a summer that provides...Ch. 5 - The feedback resistor of a three-input averaging...Ch. 5 - The feedback resistor of a five-input averaging...Ch. 5 - Show that the output voltage vo of the circuit in...Ch. 5 - Design an op amp circuit to perform the following...Ch. 5 - Using only two op amps, design a circuit to solve...Ch. 5 - The circuit in Fig. 5.79 is for a difference...Ch. 5 - The circuit in Fig. 5.80 is a differential...Ch. 5 - Design a difference amplifier to have a gain of 4...Ch. 5 - Design a circuit to amplify the difference between...Ch. 5 - Using two op amps, design a subtractor.Ch. 5 - Design an op amp circuit such that vo = 4v1 + 6v2 ...Ch. 5 - The ordinary difference amplifier for fixed-gain...Ch. 5 - Determine the voltage transfer ratio vovs in the...Ch. 5 - In a certain electronic device, a three-stage...Ch. 5 - Using Fig. 5.83, design a problem to help other...Ch. 5 - Find vo in the op amp circuit of Fig. 5.84.Ch. 5 - Calculate io in the op amp circuit of Fig. 5.85....Ch. 5 - In the op amp circuit of Fig. 5.86, determine the...Ch. 5 - Calculate vo/vi in the op amp circuit of Fig....Ch. 5 - Determine vo in the circuit of Fig. 5.88. Figure...Ch. 5 - Obtain the closed-loop voltage gain vo/vi of the...Ch. 5 - Determine the gain vovi of the circuit in Fig....Ch. 5 - For the op amp circuit shown in Fig. 5.91, find...Ch. 5 - Find vo in the op amp circuit of Fig. 5.92.Ch. 5 - For the circuit in Fig. 5.93, find vo.Ch. 5 - Obtain the output vo in the circuit of Fig. 5.94....Ch. 5 - Find vo in the circuit of Fig. 5.95, assuming that...Ch. 5 - Find vo in the circuit of Fig. 5.95, assuming that...Ch. 5 - Determine vo in the op amp circuit of Fig. 5.96.Ch. 5 - Determine vo in the op amp circuit of Fig. 5.97.Ch. 5 - Find the load voltage vL in the circuit of Fig....Ch. 5 - Determine the load voltage vL in the circuit of...Ch. 5 - Find io in the op amp circuit of Fig. 5.100....Ch. 5 - Rework Example 5.11 using the nonideal op amp...Ch. 5 - Solve Prob. 5.19 using PSpice or MultiSim and op...Ch. 5 - Solve Prob. 5.48 using PSpice or MultiSim and op...Ch. 5 - Use PSpice or MultiSim to obtain vo in the circuit...Ch. 5 - Determine vo in the op amp circuit of Fig. 5.102,...Ch. 5 - Use PSpice or MultiSim to solve Prob. 5.70....Ch. 5 - Use PSpice or MultiSim to verify the results in...Ch. 5 - Prob. 82PCh. 5 - Design a six-bit digital-to-analog converter. (a)...Ch. 5 - A four-bit R-2R ladder DAC is presented in Fig....Ch. 5 - In the op amp circuit of Fig. 5.104, find the...Ch. 5 - Design a voltage controlled ideal current source...Ch. 5 - Figure 5.105 displays a two-op-amp instrumentation...Ch. 5 - Figure 5.106 shows an instrumentation amplifier...Ch. 5 - Design a circuit that provides a relationship...Ch. 5 - The op amp circuit in Fig. 5.107 is a current...Ch. 5 - A noninverting current amplifier is portrayed in...Ch. 5 - Refer to the bridge amplifier shown in Fig. 5.109....Ch. 5 - A voltage-to-current converter is shown in Fig....
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