Question 1

-The circuit in Figure is an) .

Accepted Answer

A)  differentiator 
B)  comparator 
C)  instrumentation amplifier 
D)  ramp generator 
A)  differentiator 
B)  comparator 
C)  instrumentation amplifier 
D)  ramp generator B

Question 2

-Circuit B is an) .

Accepted Answer

A)  linear amplifier 
B)  integrator 
C)  differentiator 
D)  comparator 
A)  linear amplifier 
B)  integrator 
C)  differentiator 
D)  comparator C

Question 3

A summing amplifier has the following values: Rf = 10 kΩ, and R1=R2=R3=R4=40 kΩ. Which of the following statements is true about the circuits?

Accepted Answer

A)  The circuit will not work with the values given. 
B)  The output will equal the average of the four input voltages. 
C)  The output will equal the sum of the four input voltages. 
D)  The output will equal the sum of the squares of the four input voltages. 
A)  The circuit will not work with the values given. 
B)  The output will equal the average of the four input voltages. 
C)  The output will equal the sum of the four input voltages. 
D)  The output will equal the sum of the squares of the four input voltages. B

Question 4

The ideal output from an op-amp integrator with a square wave input would be a triangular waveform. What is the actual output wave shape?

Accepted Answer

A)  Sinusoidal 
B)  Exponential 
C)  Triangular 
D)  Square 
A)  Sinusoidal 
B)  Exponential 
C)  Triangular 
D)  Square

Question 5

The input voltages to the circuit in Figure  are as follows: V1 = 2 V, V2 = 4 V, and V3 = 8 V. What is the output voltage from the circuit?

Accepted Answer

A)  +11 V 
B)  +6 V 
C)  -11 V 
D)  -6 V 
A)  +11 V 
B)  +6 V 
C)  -11 V 
D)  -6 V

Question 6

The key to obtaining a triangular output from an integrator with a square wave input is to provide

Accepted Answer

A)  a constant-current charging source for the capacitor. 
B)  a constant-frequency charging source for the capacitor. 
C)  a constant-voltage charging source for the capacitor. 
D)  a short RC time constant. 
A)  a constant-current charging source for the capacitor. 
B)  a constant-frequency charging source for the capacitor. 
C)  a constant-voltage charging source for the capacitor. 
D)  a short RC time constant.

Question 7

The use of a variable comparator allows for

Accepted Answer

A)  changing the values of VS. 
B)  processing ultra-high frequency signals. 
C)  changing the value of Vref. 
D)  changing the limits of Vout. 
A)  changing the values of VS. 
B)  processing ultra-high frequency signals. 
C)  changing the value of Vref. 
D)  changing the limits of Vout.

Question 8

The output from a differentiator is proportional to

Accepted Answer

A)  the peak value of the input voltage. 
B)  the rate of change of the input voltage. 
C)  the rate of change of the input frequency. 
D)  None of these are correct. 
A)  the peak value of the input voltage. 
B)  the rate of change of the input voltage. 
C)  the rate of change of the input frequency. 
D)  None of these are correct.

Question 9

-What is the general-class equation for the circuit in Figure?

Accepted Answer

A)  Vout = V1 + 2V2 + 4V3 
B)  -Vout = V1 + 0.5V2 + 0.25V3 
C)  -Vout = V1 + 2V2 + 0.25V3 
D)  None of these are correct. 
A)  Vout = V1 + 2V2 + 4V3 
B)  -Vout = V1 + 0.5V2 + 0.25V3 
C)  -Vout = V1 + 2V2 + 0.25V3 
D)  None of these are correct.

Question 10

The comparator may be used as a/an

Accepted Answer

A)  linear amplifier. 
B)  oscillator. 
C)  sine wave to rectangular wave converter. 
D)  rectangular wave to triangular wave converter. 
A)  linear amplifier. 
B)  oscillator. 
C)  sine wave to rectangular wave converter. 
D)  rectangular wave to triangular wave converter.

Question 11

- CB is used to

Accepted Answer

A)  filter out power supply current surges. 
B)  prevent variations in vin from affecting the voltage divider. 
C)  filter out unwanted stray inductance. 
D)  filter out unwanted stray capacitance. 
A)  filter out power supply current surges. 
B)  prevent variations in vin from affecting the voltage divider. 
C)  filter out unwanted stray inductance. 
D)  filter out unwanted stray capacitance.

Question 12

-The circuit in Figure  has the following values: R1=10 kΩ, Rf = 180 kΩ, and C1 = 0.1 μF. Which of the following statements is true?

Accepted Answer

A)  The maximum voltage gain of the circuit equals the ratio of Rf to R1. 
B)  The maximum voltage gain of the circuit is approximately equal to the AOL rating of the op-amp. 
C)  The circuit is an inverting amplifier with a bypassed feedback resistor. 
D)  None of the above statements are true. 
A)  The maximum voltage gain of the circuit equals the ratio of Rf to R1. 
B)  The maximum voltage gain of the circuit is approximately equal to the AOL rating of the op-amp. 
C)  The circuit is an inverting amplifier with a bypassed feedback resistor. 
D)  None of the above statements are true.

Question 13

-The circuit in Figure  has the following values: R1 = 7 kΩ, R2 = 1 kΩ, CB = 1 μF, and supply voltages of ±10 V. The input is + 1 V. What is the approximate output voltage?

Accepted Answer

A)  + 9 V 
B)  - 9 V 
C)  + 5 V 
D)  - 5 V 
A)  + 9 V 
B)  - 9 V 
C)  + 5 V 
D)  - 5 V

Question 14

A summing amplifier may be used as a/an

Accepted Answer

A)  linear amplifier. 
B)  oscillator. 
C)  digital-to-analog converter. 
D)  analog-to-digital converter. 
A)  linear amplifier. 
B)  oscillator. 
C)  digital-to-analog converter. 
D)  analog-to-digital converter.

Question 15

Instrumentation amplifiers are used to amplify signals.

Accepted Answer

A)  high frequency 
B)  out of phase 
C)  high level 
D)  low level 
A)  high frequency 
B)  out of phase 
C)  high level 
D)  low level

Question 16

-Circuit A is an) .

Accepted Answer

A)  linear amplifier 
B)  integrator 
C)  differentiator 
D)  comparator 
A)  linear amplifier 
B)  integrator 
C)  differentiator 
D)  comparator

Question 17

-The circuit in Figure  has the following values: R1=10 kΩ and C1 = 0.1 μF. Which of the following statements is true?

Accepted Answer

A)  The maximum voltage gain of the circuit equals the ratio of Rf to R1. 
B)  The maximum voltage gain of the circuit is approximately equal to the AOL rating of the op-amp. 
C)  The circuit is an inverting amplifier with an input coupling capacitor. 
D)  None of the above statements are true. 
A)  The maximum voltage gain of the circuit equals the ratio of Rf to R1. 
B)  The maximum voltage gain of the circuit is approximately equal to the AOL rating of the op-amp. 
C)  The circuit is an inverting amplifier with an input coupling capacitor. 
D)  None of the above statements are true.

Question 18

A comparator is a circuit that is used to provide a output when the input voltage is more than a fixed reference voltage.

Accepted Answer

A)  positive; positive; positive 
B)  positive; negative; positive 
C)  negative; positive; negative 
D)  All of these are correct. 
A)  positive; positive; positive 
B)  positive; negative; positive 
C)  negative; positive; negative 
D)  All of these are correct.

Question 19

Two common-mode inputs to an instrumentation amplifier have identical .

Accepted Answer

A)  amplitude 
B)  amplitude and phase 
C)  frequency 
D)  amplitude and frequency 
A)  amplitude 
B)  amplitude and phase 
C)  frequency 
D)  amplitude and frequency

Question 20

A comparator has the following values: RL = 20 kΩ, VS = +10 V, and Vref = +2 V applied to the inverting input). If the noninverting input goes to +3 V, the output voltage

Accepted Answer

A)  will be approximately +9 V. 
B)  will be approximately -9 V. 
C)  will be approximately +3 V. 
D)  cannot be determined without knowing the value of ACL for the circuit. 
A)  will be approximately +9 V. 
B)  will be approximately -9 V. 
C)  will be approximately +3 V. 
D)  cannot be determined without knowing the value of ACL for the circuit.

Exam 16: Additional Op-Amp Applications

-The circuit in Figure is an) .

-Circuit B is an) .

A summing amplifier has the following values: Rf = 10 kΩ, and R1=R2=R3=R4=40 kΩ. Which of the following statements is true about the circuits?

The ideal output from an op-amp integrator with a square wave input would be a triangular waveform. What is the actual output wave shape?

The input voltages to the circuit in Figure are as follows: V1 = 2 V, V2 = 4 V, and V3 = 8 V. What is the output voltage from the circuit?

The key to obtaining a triangular output from an integrator with a square wave input is to provide

The use of a variable comparator allows for

The output from a differentiator is proportional to

-What is the general-class equation for the circuit in Figure?

The comparator may be used as a/an

- CB is used to

-The circuit in Figure has the following values: R1=10 kΩ, Rf = 180 kΩ, and C1 = 0.1 μF. Which of the following statements is true?

-The circuit in Figure has the following values: R1 = 7 kΩ, R2 = 1 kΩ, CB = 1 μF, and supply voltages of ±10 V. The input is + 1 V. What is the approximate output voltage?

A summing amplifier may be used as a/an

Instrumentation amplifiers are used to amplify signals.

-Circuit A is an) .

-The circuit in Figure has the following values: R1=10 kΩ and C1 = 0.1 μF. Which of the following statements is true?

A comparator is a circuit that is used to provide a output when the input voltage is more than a fixed reference voltage.

Two common-mode inputs to an instrumentation amplifier have identical .

A comparator has the following values: RL = 20 kΩ, VS = +10 V, and Vref = +2 V applied to the inverting input). If the noninverting input goes to +3 V, the output voltage

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

Operational Amplifiers

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

Filters