Question 1

Negative feedback the bandwidth of a noninverting amplifier.

Accepted Answer

A)  increases 
B)  decreases 
C)  does not affect
Chapter 15 Operational Amplifiers Answer Key 
A)  increases 
B)  decreases 
C)  does not affect
Chapter 15 Operational Amplifiers Answer Key

Question 2

Positive feedback is used to produce a special type of circuit called a/an

Accepted Answer

A)  inverting amplifier. 
B)  noninverting amplifier. 
C)  oscillator. 
D)  feedback regulator. 
A)  inverting amplifier. 
B)  noninverting amplifier. 
C)  oscillator. 
D)  feedback regulator.

Question 3

An op-amp has a slew rate of 0.2 V/μs. If the the circuit has a sine wave input and its peak output is 15 V, what is its maximum operating frequency?

Accepted Answer

A)  2.12 kHz 
B)  21.2 Hz 
C)  471 Hz 
D)  4.71 kHz 
A)  2.12 kHz 
B)  21.2 Hz 
C)  471 Hz 
D)  4.71 kHz

Question 4

An inverting amplifier and a noninverting amplifier are built using the same values of Rf and Rin. Assuming that the op-amps being used in the two circuits have identical common-mode gain values, which circuit will have the higher CMRR?

Accepted Answer

A)  The inverting amplifier 
B)  The noninverting amplifier 
C)  Neither. The two CMRR values will be equal. 
A)  The inverting amplifier 
B)  The noninverting amplifier 
C)  Neither. The two CMRR values will be equal.

Question 5

Which of the following statements is true?

Accepted Answer

A)  Op-amps are high-gain dc amplifiers. 
B)  Op-amps have extremely high input impedance. 
C)  Op-amps have extremely low output impedance. 
D)  All of these statements are true. 
A)  Op-amps are high-gain dc amplifiers. 
B)  Op-amps have extremely high input impedance. 
C)  Op-amps have extremely low output impedance. 
D)  All of these statements are true.

Question 6

An inverting amplifier with ±11 V supply voltages normally has a 10Vpp sinusoidal output. Checking the circuit with an oscilloscope shows that the output is 0 V. Which of the following could account for this problem?

Accepted Answer

A)  Ri open 
B)  Rf open 
C)  Rf shorted by a solder bridge 
D)  either R1 is open or Rf is shorted 
A)  Ri open 
B)  Rf open 
C)  Rf shorted by a solder bridge 
D)  either R1 is open or Rf is shorted

Question 7

Negative feedback

Accepted Answer

A)  decreases bandwidth. 
B)  increases circuit gain. 
C)  increases amplifier noise. 
D)  decreases circuit gain. 
A)  decreases bandwidth. 
B)  increases circuit gain. 
C)  increases amplifier noise. 
D)  decreases circuit gain.

Question 8

-The op-amp in Figure  has a slew rate of 12 V/μs. If the the circuit has a sine wave input and its peak output is 9 V, what is its maximum operating frequency?

Accepted Answer

A)  approximately 212.2 kHz. 
B)  approximately 347.2 kHz. 
C)  approximately 382.0 kHz. 
D)  None of the above. 
A)  approximately 212.2 kHz. 
B)  approximately 347.2 kHz. 
C)  approximately 382.0 kHz. 
D)  None of the above.

Question 9

A voltage follower has values of RL = 12 kΩ, VS = ±12 V, and Vin = 10 Vpk.What is the peak-to-peak output from the circuit?

Accepted Answer

A)  20 Vpp 
B)  21 Vpp 
C)  12 Vpp 
D)  Cannot be determined from the information given. 
A)  20 Vpp 
B)  21 Vpp 
C)  12 Vpp 
D)  Cannot be determined from the information given.

Question 10

An op-amp has the part number TL741CN. The prefix TL identifies

Accepted Answer

A)  the operating temperature range. 
B)  the type of op-amp. 
C)  the device manufacturer. 
D)  the type of component casing used. 
A)  the operating temperature range. 
B)  the type of op-amp. 
C)  the device manufacturer. 
D)  the type of component casing used.

Question 11

-The op-amp in Figure has an input impedance of 5 MΩ. What is the input impedance of the circuit?

Accepted Answer

A)  5 MΩ 
B)  10 kΩ 
C)  50 MΩ 
D)  110 kΩ 
A)  5 MΩ 
B)  10 kΩ 
C)  50 MΩ 
D)  110 kΩ

Question 12

The voltage gain of an op-amp circuit is always less than or equal to the AOL rating for the op-amp.

Accepted Answer

A) True 
 B)False

Negative feedback the bandwidth of a noninverting amplifier.

Positive feedback is used to produce a special type of circuit called a/an

An op-amp has a slew rate of 0.2 V/μs. If the the circuit has a sine wave input and its peak output is 15 V, what is its maximum operating frequency?

An inverting amplifier and a noninverting amplifier are built using the same values of Rf and Rin. Assuming that the op-amps being used in the two circuits have identical common-mode gain values, which circuit will have the higher CMRR?

Which of the following statements is true?

An inverting amplifier with ±11 V supply voltages normally has a 10Vpp sinusoidal output. Checking the circuit with an oscilloscope shows that the output is 0 V. Which of the following could account for this problem?

Negative feedback

-The op-amp in Figure has a slew rate of 12 V/μs. If the the circuit has a sine wave input and its peak output is 9 V, what is its maximum operating frequency?

A voltage follower has values of RL = 12 kΩ, VS = ±12 V, and Vin = 10 Vpk.What is the peak-to-peak output from the circuit?

An op-amp has the part number TL741CN. The prefix TL identifies

-The op-amp in Figure has an input impedance of 5 MΩ. What is the input impedance of the circuit?

The voltage gain of an op-amp circuit is always less than or equal to the AOL rating for the op-amp.

Fundamental Solid-State Principles

Diodes

Common Diode Applications: Basic Power Supply Circuits

Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Special Applications Diodes

Bipolar Junction Transistors

DC Biasing Circuits

Introduction to Amplifiers

Common-Emitter Amplifiers

Other BJT Amplifiers

Power Amplifiers

Field-Effect Transistors

Mosfets

Amplifier Frequency Response

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

Filters

Exam 15: Operational Amplifiers

Negative feedback the bandwidth of a noninverting amplifier.

Positive feedback is used to produce a special type of circuit called a/an

An op-amp has a slew rate of 0.2 V/μs. If the the circuit has a sine wave input and its peak output is 15 V, what is its maximum operating frequency?

An inverting amplifier and a noninverting amplifier are built using the same values of Rf and Rin. Assuming that the op-amps being used in the two circuits have identical common-mode gain values, which circuit will have the higher CMRR?

Which of the following statements is true?

An inverting amplifier with ±11 V supply voltages normally has a 10Vpp sinusoidal output. Checking the circuit with an oscilloscope shows that the output is 0 V. Which of the following could account for this problem?

Negative feedback

-The op-amp in Figure has a slew rate of 12 V/μs. If the the circuit has a sine wave input and its peak output is 9 V, what is its maximum operating frequency?

A voltage follower has values of RL = 12 kΩ, VS = ±12 V, and Vin = 10 Vpk.What is the peak-to-peak output from the circuit?

An op-amp has the part number TL741CN. The prefix TL identifies

-The op-amp in Figure has an input impedance of 5 MΩ. What is the input impedance of the circuit?

The voltage gain of an op-amp circuit is always less than or equal to the AOL rating for the op-amp.

Fundamental Solid-State Principles

Diodes

Common Diode Applications: Basic Power Supply Circuits

Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Special Applications Diodes

Bipolar Junction Transistors

DC Biasing Circuits

Introduction to Amplifiers

Common-Emitter Amplifiers

Other BJT Amplifiers

Power Amplifiers

Field-Effect Transistors

Mosfets

Amplifier Frequency Response

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

Filters