Electronics Fundamentals: Circuits, Devices & Applications
8th Edition
ISBN: 9780135072950
Author: Thomas L. Floyd, David Buchla
Publisher: Prentice Hall
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Chapter 18, Problem 2P
Two IC op-amps are available to you. Their characteristics are as follows:
Op-amp 1:
Op-amp 2:
Choose the one you think is generally more desirable.
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Calculate the output voltage of an op-amp summing amplifier for the given values of voltages and resistors. Use Rf = 1 MΩ.
V1 = 5.84V
V2 = 8.47V
V3 = 8.25V
R1 = 482kΩ
R2 = 0.58MΩ
R3 = 1.31MΩ
QUICKLY
Determine the output voltage of an op amp amplifier circuit with the following parameters:
Differential voltage gain = 4522CMRR = 631Vi1 = 659 mV Vi2 = 659 mV
Vi1 and Vi2 are in phase and have the same frequency. \
QUICKLY
The resistor Rf in the circuit attached is adjusted until the ideal op amp saturates. Specify Rf in kilo-ohms.
Chapter 18 Solutions
Electronics Fundamentals: Circuits, Devices & Applications
Ch. 18 - When a diff-amp has identical signals on both...Ch. 18 - A high CMRR for a diff-amp means the common-mode...Ch. 18 - Prob. 3TFQCh. 18 - The open-loop voltage gain of an op-amp is also...Ch. 18 - Prob. 5TFQCh. 18 - Prob. 6TFQCh. 18 - In a voltage-follower, the open-loop and...Ch. 18 - Prob. 8TFQCh. 18 - Prob. 9TFQCh. 18 - If the feedback resistor in an amplifier is open,...
Ch. 18 - Which characteristic docs not necessarily apply to...Ch. 18 - In selecting an op-amp. suppose you have several...Ch. 18 - Prob. 3STCh. 18 - Prob. 4STCh. 18 - Prob. 5STCh. 18 - Prob. 6STCh. 18 - Prob. 7STCh. 18 - Prob. 8STCh. 18 - If you know an op-amp's open-loop gain and nothing...Ch. 18 - Prob. 10STCh. 18 - Prob. 11STCh. 18 - The highest possible input resistance is achieved...Ch. 18 - Compare a practical op-amp to an ideal op-amp.Ch. 18 - Two IC op-amps are available to you. Their...Ch. 18 - Identify the type of input and output...Ch. 18 - Prob. 4PCh. 18 - A certain diff-amp has a differential gain of 60...Ch. 18 - A certain diff-amp has a CMRR of 65 dB. If the...Ch. 18 - Identify the type of input mode for each op-amp in...Ch. 18 - Show the common-mode input in Figure 18-37 in an...Ch. 18 - Determine the bias current, IBIAS, given that the...Ch. 18 - Distinguish between input bias current and input...Ch. 18 - A certain op-amp has a CMRR of 250,000. Convert...Ch. 18 - The open-loop gain of a certain op-amp is 175,000....Ch. 18 - The op-amp data sheet specifies a CMRR of 300,000...Ch. 18 - Figure 18-38 shows the output voltage of an op-amp...Ch. 18 - How long does it take the output voltage of an...Ch. 18 - Identify each of the op-amp configurations in...Ch. 18 - For the amplifier in Figure 18-40. determine the...Ch. 18 - Determine the closed-loop gain of each amplifier...Ch. 18 - Find the value of Rf that will produce the...Ch. 18 - Find the gain of each in amplifier in Figure...Ch. 18 - If a signal voltage of 10 mV applied to each...Ch. 18 - Determine the approximate values for each of the...Ch. 18 - Determine the input and output resistances for...Ch. 18 - Repeat Problem 23 for each circuit in Figure...Ch. 18 - Repeat Problem 23 for each circuit in Figure...Ch. 18 - Prob. 26PCh. 18 - Prob. 28PCh. 18 - Prob. 29PCh. 18 - Prob. 30PCh. 18 - Prob. 31PCh. 18 - Prob. 32P
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- Draw the equivalent integrator op amp circuit with the following parameters and solve for its Vo R = 5 kohms C = 10 nF Vi = sinwt = sin2pift f = 1 kohmarrow_forward1. For the circuit shown, show that if ΔR<<R, the output voltage of the op amp is approximately vo≈Rf(R+Rf)R2(R+2Rf)(−ΔR)vin. 2. Find vo if Rf=470 kΩ, R=10 kΩ, ΔR=95 Ω, and vin=15 V. 3. Find the actual value of vo in (b).arrow_forwardCalculate the output voltage of an op-amp summing amplifier for the followingsets, consider Rf=1Mna. V1=+1v, V2=+2v, V3=+3v, Ri=R2, R3=500Ω b. V1=+1v, V2=+2v, V3=+3v, Ri-500kΩ, R2=1MΩ, R3=1MΩarrow_forward
- The two input terminals of an op amp are connected to voltage signals of strength 745 micro volts and 740 micro volts respectively.the gain of op amp in common mode is 50*10 power 5 and CMRR is 80dB.calculate the output voltage and percentage error due to common modearrow_forwardThe op amp in the circuit shown is ideal. Calculate vo if va=2 V and vb=1 V.arrow_forwardFind io assuming op-amps is ideal (X=4,Y=6)arrow_forward
- An op amp has an input offset voltage of 2.3 mV. It is used in an inverting amplifier whose gain is -3. What is the output voltage if the input to the amplifier is zero. Express your answer in millivolts, accurate to two decimal places.arrow_forwardA summing amp has the following values: R1 = 1.1kΩ R2 = 1.1 kΩ, R3 = 2kΩ, Rf = 2.4kΩ, V1 = 1.9V V2 = 1.5 V, V3 = -3.1 V. The output of this circuit isarrow_forwardHow to create a circuit that has three varying input voltages and one output voltage that is equal to the average of the three? Vin = V1, V2, V3Vout = (V1 + V2 + V3) / 3 Example:V1 = 750mV, V2 = 700mV, V3 = 800mVVo = 750mV You can only use resistors and OpAmps (operational amplifiers), show circuit schematic and computations/formulas usedarrow_forward
- How would the output of Circuit 2 been different if the op amp had not been used? In other words, if the op amp had been replaced by a wire connecting pin 3 to pin 6, how would your response have been differentarrow_forwardBased on the op amp circuit in Figure, answer the following questions,assuming an ideal op-amp. Given:V1 = 1 VI2 = 2 mAV3 = 0.5 VRa = 2 kΩRb = 1 kΩRc = 5 kΩRd = 10 kΩVx = 4VIb = 3.5mANow I need to determine Vo and the current and power through Rd.Please help, Thank youarrow_forwardIn the figure above, R_{a}Ra=1kΩ, R_{b}Rb=2kΩ, R_{c}Rc=3kΩ. R_{f}Rf=12kΩ. The sources are v_{a}va=−4V, v_{b}vb=+2V, and v_{c}vc=1V. The power supplies for the op-amp are +15V and −15V. What is the value of v_{o}vo? Notice that this op amp circuit might saturate, and you need to consider that possibility in your answer. Give your answer in volts and omit the units from your answer. What must be R_aRa be changed to so that v_{o}vo is 13 V? Give your answer in kilo-ohms with no units.arrow_forward
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