Microelectronics: Circuit Analysis and Design
4th Edition
ISBN: 9780073380643
Author: Donald A. Neamen
Publisher: McGraw-Hill Companies, The
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Textbook Question
Chapter 9, Problem 9.47P
The circuit shown in Figure P9.47 can be used as a variable noninverting amplifier. The circuit uses a
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with steps."
Find Laplace transform and the corresponding ROC for
x(t) = e−3sin(2t) u(t)dt
Three similar coils, connected in star, take a total
power of 1.5 kW, at a power factor of 0.2, from a
three-phase, 400 V, 50 Hz supply. Calculate: (a) the
resistance and inductance of each coil; (b) the line
currents if one of the coils is short-circuited.
(a) Three 20 µF capacitors are star-connected across
a 400 V, 50 Hz, three-phase, three-wire supply.
Calculate the current in each line. (b) If one of the
capacitors is short-circuited, calculate the line cur
rents. (c) If one of the capacitors is open-circuited,
calculate: the line currents and the p.d. across each
of the other two capacitors.
ANS:
1.525 A; 2.64 A, 2.64 A, 4.57 A; 1.32 A, 1.32 A, 0;
210 V
Chapter 9 Solutions
Microelectronics: Circuit Analysis and Design
Ch. 9 - Design an ideal inverting op-amp circuit such that...Ch. 9 - Design an ideal inverting op-amp circuit with a...Ch. 9 - (a) An inverting op-amp circuit is to be designed...Ch. 9 - (a) Design an ideal inverting op-amp circuit such...Ch. 9 - Prob. 9.2TYUCh. 9 - Consider an inverting op-amp circuit as shown in...Ch. 9 - (a) Design an inverting summing amplifier that...Ch. 9 - Consider an ideal summing amplifier as shown in...Ch. 9 - Design the summing amplifier in Figure 9.14 to...Ch. 9 - (a) Design a noninverting amplifier such that the...
Ch. 9 - The noninverting op-amp in Figure 9.15 has a...Ch. 9 - Use superposition to determine the output voltage...Ch. 9 - Consider the voltage-to-current converter shown in...Ch. 9 - Consider the difference amplifier in Figure...Ch. 9 - In the difference amplifier shown in Figure...Ch. 9 - For the instrumentation amplifier in Figure 9.26,...Ch. 9 - An integrator with input and output voltages that...Ch. 9 - A current source has an output impedance of...Ch. 9 - Design the voltage-to-current converter shown in...Ch. 9 - All parameters associated with the instrumentation...Ch. 9 - Design the instrumentation amplifier in Figure...Ch. 9 - An integrator is driven by the series of pulses...Ch. 9 - Consider the summing op-amp in Figure 9.40. Let...Ch. 9 - Consider the bridge circuit in Figure 9.46. The...Ch. 9 - The resistance R in the bridge circuit in Figure...Ch. 9 - Describe the ideal op-amp model and describe the...Ch. 9 - Prob. 2RQCh. 9 - Describe the operation and characteristics of the...Ch. 9 - What is the concept of virtual ground?Ch. 9 - What is the significance of a zero output...Ch. 9 - When a finite op-amp gain is taken into account,...Ch. 9 - Prob. 7RQCh. 9 - Describe the operation and characteristics of the...Ch. 9 - Describe the voltage follower. What are the...Ch. 9 - What is the input resistance of an ideal...Ch. 9 - Prob. 11RQCh. 9 - Describe the operation and characteristics of an...Ch. 9 - Describe the operation and characteristics of an...Ch. 9 - Describe the operation and characteristics of an...Ch. 9 - Assume an op-amp is ideal, except for having a...Ch. 9 - The op-amp in the circuit shown in Figure P9.2 is...Ch. 9 - An op-amp is in an open-loop configuration as...Ch. 9 - Consider the equivalent circuit of the op-amp...Ch. 9 - Consider the ideal inverting op-amp circuit shown...Ch. 9 - Assume the op-amps in Figure P9.6 are ideal. Find...Ch. 9 - Consider an ideal inverting op-amp with R2=100k...Ch. 9 - (a) Design an inverting op-amp circuit with a...Ch. 9 - Consider an ideal op-amp used in an inverting...Ch. 9 - Consider the inverting amplifier shown in Figure...Ch. 9 - (a) Design an inverting op-amp circuit with a...Ch. 9 - (a) Design an inverting op-amp circuit such that...Ch. 9 - (a) In an inverting op-amp circuit, the nominal...Ch. 9 - (a) The input to the circuit shown in Figure P9.14...Ch. 9 - Design an inverting amplifier to provide a nominal...Ch. 9 - The parameters of the two inverting op-amp...Ch. 9 - Design the cascade inverting op-amp circuit in...Ch. 9 - Design an amplifier system with three inverting...Ch. 9 - Consider the circuit shown in Figure P9.19. (a)...Ch. 9 - The inverting op-amp shown in Figure 9.9 has...Ch. 9 - (a)An op-amp with an open-loop gain of Aod=7103 is...Ch. 9 - (a) For the ideal inverting op-amp circuit with...Ch. 9 - An ideal inverting op-amp circuit is to be...Ch. 9 - For the op-amp circuit shown in Figure P9.25,...Ch. 9 - The inverting op-amp circuit in Figure 9.9 has...Ch. 9 - (a) Consider the op-amp circuit in Figure P9.27....Ch. 9 - The circuit in Figure P9.28 is similar to the...Ch. 9 - Consider the ideal inverting summing amplifier in...Ch. 9 - (a) Design an ideal inverting summing amplifier to...Ch. 9 - Design an ideal inverting summing amplifier to...Ch. 9 - Consider the summing amplifier in Figure 9.14 with...Ch. 9 - The parameters for the summing amplifier in Figure...Ch. 9 - (a) Design an ideal summing op-amp circuit to...Ch. 9 - An ideal three-input inverting summing amplifier...Ch. 9 - A summing amplifier can be used as a...Ch. 9 - Consider the circuit in Figure P9.38. (a) Derive...Ch. 9 - Consider the summing amplifier in Figure 9.14(a)....Ch. 9 - Consider the ideal noninverting op-amp circuit in...Ch. 9 - (a) Design an ideal noninverting op-amp circuit...Ch. 9 - Consider the noninverting amplifier in Figure...Ch. 9 - For the circuit in Figure P9.43, the input voltage...Ch. 9 - Determine vO as a function of vI1 and vI2 for the...Ch. 9 - Consider the ideal noninverting op-amp circuit in...Ch. 9 - (a) Derive the expression for the closed-loop...Ch. 9 - The circuit shown in Figure P9.47 can be used as a...Ch. 9 - (a) Determine the closed-loop voltage gain...Ch. 9 - For the amplifier in Figure P9.49, determine (a)...Ch. 9 - Consider the voltage-follower circuit in Figure...Ch. 9 - (a) Consider the ideal op-amp circuit shown in...Ch. 9 - (a) Assume the op-amp in the circuit in Figure...Ch. 9 - Prob. 9.53PCh. 9 - A current-to-voltage converter is shown in Figure...Ch. 9 - Figure P9.55 shows a phototransistor that converts...Ch. 9 - The circuit in Figure P9.56 is an analog voltmeter...Ch. 9 - Consider the voltage-to-current converter in...Ch. 9 - The circuit in Figure P9.58 is used to drive an...Ch. 9 - Figure P9.59 is used to calculate the resistance...Ch. 9 - Consider the op-amp difference amplifier in Figure...Ch. 9 - Consider the differential amplifier shown in...Ch. 9 - Consider the differential amplifier shown in...Ch. 9 - Let R=10k in the differential amplifier in Figure...Ch. 9 - Consider the circuit shown in Figure P9.64. (a)...Ch. 9 - The circuit in Figure P9.65 is a representation of...Ch. 9 - Consider the adjustable gain difference amplifier...Ch. 9 - Assume the instrumentation amplifier in Figure...Ch. 9 - Consider the circuit in Figure P9.68. Assume ideal...Ch. 9 - Consider the circuit in Figure P969. Assume ideal...Ch. 9 - The instrumentation amplifier in Figure 9.26 has...Ch. 9 - Design the instrumentation amplifier in Figure...Ch. 9 - All parameters associated with the instrumentation...Ch. 9 - The parameters in the integrator circuit shown in...Ch. 9 - Consider the ideal op-amp integrator. Assume the...Ch. 9 - The circuit in Figure P9.75 is a first-order...Ch. 9 - (a) Using the results of Problem 9.75, design the...Ch. 9 - The circuit shown in Figure P9.77 is a first-order...Ch. 9 - (a) Using the results of Problem 9.77, design the...Ch. 9 - Prob. 9.79PCh. 9 - Consider the circuit in Figure 9.35. The diode...Ch. 9 - In the circuit in Figure P9.81, assume that Q1 and...Ch. 9 - Consider the circuit in Figure 9.36. The diode...Ch. 9 - Design an op-amp summer to produce the output...Ch. 9 - Design an op-amp summer to produce an output...Ch. 9 - Design a voltage reference source as shown in...Ch. 9 - Consider the voltage reference circuit in Figure...Ch. 9 - Consider the bridge circuit in Figure P9.87. The...Ch. 9 - Consider the bridge circuit in Figure 9.46. The...
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- Explain the advantages of three-phase supply for distribution purposes. (b) Assuming the relationship between the line and phase values of currents and voltages, show that the active power input to a three-phase balanced load is √3VI cos φ, where V and I are line quantities. (c) Three similar inductors, each of resistance 10 Ω and inductance 0.019 H, are delta-connected to a three-phase, 400 V, 50 Hz sinusoidal supply. Calcu late: the value of the line current; the power factor and the active power input to the circuit. ANS: 59.5 A, 0.858 lag, 35.5 kWarrow_forwardnot use ai pleasearrow_forwardA three-phase, 400 V, star-connected motor has an output of 50 kW, with an efficiency of 90 per cent and a power factor of 0.85. Calculate the line current. Sketch a phasor diagram showing the voltages and currents. If the motor windings were connected in mesh, what would be the correct voltage of a three phase supply suitable for the motor? ANS: 90.8 A, 240 Varrow_forward
- Don't use ai to answer I will report you answerarrow_forwardShow with the aid of a phasor diagram that for both star- and delta-connected balanced loads, the total active power is given by √3VI cos φ, where V and I are the line values of voltage and current respectively and φ is the angle between phase values of voltage and current. A balanced three-phase load consists of three coils, each of resistance 4 Ω and inductance 0.02 H. Determine the total active power when the coils are (a) star-connected, (b) delta-connected to a 400 V, three phase, 50 Hz supply. ANS:11.56 kW, 34.7 kWarrow_forwardThe load connected to a three-phase supply comprises three similar coils connected in star. The line currents are 25 A and the apparent and active power inputs are 20 kVA and 11 kW respectively. Find the line and phase voltages, reactive power input and the resistance and reactance of each coil. If the coils are now con nected in delta to the same three-phase supply, calculate the line currents and the active power taken. ANS : 462 V, 267 V, 16.7 kvar, 5.87 Ω, 8.92 Ω; 75 A, 33 kWarrow_forward
- A three-phase delta-connected load, each phase of which has an inductive reactance of 40 Ω and a resistance of 25 Ω, is fed from the secondary of a three-phase star-connected transformer which has a phase voltage of 230 V. Draw the circuit diagram of the system and calculate: (a) the current in each phase of the load; (b) the p.d. across each phase of the load; (c) the current in the transformer secondary windings; the total active power taken from the supply and its power factor.arrow_forwardDerive the numerical relationship between the line and phase currents for a balanced three-phase delta connected load. Three coils are connected in delta to a three-phase, three-wire, 400 V, 50 Hz supply and take a line current of 5 A 0.8 power factor lagging. Calculate the resistance and inductance of the coils. If the coils are star-connected to the same supply, calculate the line current and the total power. Calculate the line cur rents if one coil becomes open-circuited when the coils are connected in star. Ans: 110.7 Ω, 0.264 H; 1.67 A, 926 W; 1.445 A, 1.445 A, 0arrow_forwardDerive, for both star- and delta-connected systems, an expression for the total power input for a balanced three-phase load in terms of line voltage, line current and power factor. The star-connected secondary of a transformer supplies a delta-connected motor taking a power of 90 kW at a lagging power factor of 0.9. If the volt age between lines is 600 V, calculate the current in the transformer winding and in the motor winding. Draw circuit and phasor diagrams, properly labelled, showing all voltages and currents in the transformer secondary and the motor. ANS: . 96.2 A, 55.6 Aarrow_forward
- Deduce the relationship between the phase and the line voltages of a three-phase star-connected generator. If the phase voltage of a three-phase star-connected generator is 200 V, what will be the line voltages: (a) when the phases are correctly connected; (b) when the connections to one of the phases are reversed? ans: 346 V; 346 V, 200 V, 200 Varrow_forwardQ2: Given a discrete sequence x(n) = [1,-1,2,4, 1, 3,-1,1] and its spectrum X(k): i. Show that: X(k) =G(k)+WH(k) k=0,1,2,3,4,5,6,7 where G(k) = DFT[g(n)] and H(k) = DFT[h(n)], g(n) and h(n) are even and odd components of x(n) respectively. ii. Compute G(k) and H(k) using the method of computation of DFTS of two real sequences. (15 marks)arrow_forwardQ2: Given a discrete sequence x(n) = [1,-1,2,4, 1, 3,-1,1] and its spectrum X(k): i. Show that: X(k) = G(k)+WH(k) k = 0,1,2,3,4,5,6,7 where G(k) = DFT[g(n)] and H(k) = DFT[h(n)], g(n) and h(n) are even and odd components of x(n) respectively. ii. Compute G(k) and H(k) using the method of computation of DFTS of two real sequences.arrow_forward
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