Basic Engineering Circuit Analysis
11th Edition
ISBN: 9781118992661
Author: Irwin, J. David, NELMS, R. M., 1939-
Publisher: Wiley,
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Textbook Question
Chapter 4, Problem 20P
For the amplifier in Fig. P4.20, the maximum value of
(a) If
(b) Repeat for
(c) Discuss the impact of the supplies on the maximum allowable gain.
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The circuit shown in Fig. 4 provides transfer characteristics with +7.5 V levels at the output vo.
When v 0 V, a current of 0.5 mA flows in the feedback resistor (R2) and a current of 1.0 mA
flows through the zener-diodes. Assume that the output saturation levels of the op-amp are ±12.0
V, the forward-drop voltage of the zener-diode is 0.7 V, and the value of R, is equal to R2.
a) Specify the zener-voltages of the zener diodes.
b) Find the values of all resistors.
R2
R1
R
Z Z,
Fig. 4
Q4: Consider the uA741C-based op-amp amplifier circuit shown below; The input voltage, Vi, is
2.5 volts. R2 is 5,000 ohms and RI is 1,000 ohms :
R2
vo
• What is the name of the circuit?
• What is the value of the voltage at the negative input of the op-amp?
• What is the value of the current through the 1 k2 resistor, in?
9
+
R₂
2
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R₁
Figure Q4.b(ii)
1) Draw the compete circuit with the op-amp included.
2) Obtain equations for the contribution made by each of the bias current sources
IBp, IBn and the voltage offset source Vos to the output voltage Vo.
3) Suggest how the value chosen for R3 will be related to R₁ and R₂.
Chapter 4 Solutions
Basic Engineering Circuit Analysis
Ch. 4 - An amplifier has a gain of 15 and the input...Ch. 4 - An amplifier has a gain of 5 and the output...Ch. 4 - An op-amp based amplifier has supply voltages of...Ch. 4 - For an ideal op-amp, the voltage gain and input...Ch. 4 - Revisit your answers in Problem 4.4 under the...Ch. 4 - Revisit the exact analysis of the inverting...Ch. 4 - Revisit the exact analysis of the inverting...Ch. 4 - An op-amp based amplifier has 18V supplies and a...Ch. 4 - Assuming an ideal op-amp, determine the voltage...Ch. 4 - Assuming an ideal op-amp, determine the voltage...
Ch. 4 - Assuming an ideal op-amp in Fig. P4.11, determine...Ch. 4 - Assuming an ideal op-amp, find the voltage gain of...Ch. 4 - Assuming an ideal op-amp in Fig. P4.13, determine...Ch. 4 - Determine the gain of the amplifier in Fig. P4.14....Ch. 4 - For the amplifier in Fig. P4.15, find the gain and...Ch. 4 - Using the ideal op-amp assumptions, determine the...Ch. 4 - Using the ideal op-amp assumptions, determine...Ch. 4 - In a useful application, the amplifier drives a...Ch. 4 - The op-amp in the amplifier in Fig. P4.19 operates...Ch. 4 - For the amplifier in Fig. P4.20, the maximum value...Ch. 4 - For the circuit in Fig. P4.21, (a) find Vo in...Ch. 4 - Find Vo in the circuit in Fig. P4.22, assuming...Ch. 4 - The network in Fig. P4.23 is a current-to-voltage...Ch. 4 - Prob. 24PCh. 4 - Determine the relationship between v1 and io in...Ch. 4 - Find Vo in the network in Fig. P4.26 and explain...Ch. 4 - Determine the expression for vo in the network in...Ch. 4 - Show that the output of the circuit in Fig. P4.28...Ch. 4 - Find vo in the network in Fig. P4.29.Ch. 4 - Find the voltage gain of the op-amp circuit shown...Ch. 4 - Determine the relationship between and in the...Ch. 4 - Prob. 32PCh. 4 - For the circuit in Fig. P4.33, find the value of...Ch. 4 - Find Vo in the circuit in Fig. P4.34.Ch. 4 - Find Vo in the circuit in Fig. P4.35.Ch. 4 - Determine the expression for the output voltage,...Ch. 4 - Determine the output voltage, of the noninverting...Ch. 4 - Find the input/output relationship for the current...Ch. 4 - Find V0 in the circuit in Fig. P4.39.Ch. 4 - Find Vo in the circuit in Fig. P4.40.Ch. 4 - Find the expression for in the differential...Ch. 4 - Find vo in the circuit in Fig. P4.42.Ch. 4 - Find the output voltage, vo, in the circuit in...Ch. 4 - The electronic ammeter in Example 4.7 has been...Ch. 4 - Given the summing amplifier shown in Fig. 4PFE-l,...Ch. 4 - Determine the output voltage V0 of the summing...Ch. 4 - What is the output voltage V0 in Fig. 4PFE-3. a....Ch. 4 - What value of Rf in the op-amp circuit of Fig....Ch. 4 - What is the voltage Vo in the circuit in Fig....
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