Question 1

How many op-amps does the basic instrumentation amplifier consist of?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
A) 2 
B) 3 
C) 4 
D) 5 B

Question 2

The voltage gain of an OTA can be calculated using the formula:

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)    D

Question 3

-Refer to Figure 20-2. Which of these circuits is known as a voltage-to-current converter?

Accepted Answer

A) (a) 
B) (b) 
C) (c) 
D) (d) 
A) (a) 
B) (b) 
C) (c) 
D) (d) B

Question 4

-Refer to Figure 20-1 (a). If   and the closed loop gain is 450, the value of the external gain-setting resistor RG is:

Accepted Answer

A)    
B)    
C)    
D) none of the above. 
A)    
B)    
C)    
D) none of the above.

Question 5

Which statement best differentiates between limiter and clamper circuits?

Accepted Answer

A) A limiter limits the both peaks of the output of a given signal, while the clamper limits only one. 
B) A limiter sets the limit of the peak output of a given signal while the clamper establishes a dc reference level based on the peak output of the signal from which the ac signal will vary. 
C) A limiter sets a dc reference voltage that the ac signal varies upon while the clamper limits the peak output. 
D) none of the above 
A) A limiter limits the both peaks of the output of a given signal, while the clamper limits only one. 
B) A limiter sets the limit of the peak output of a given signal while the clamper establishes a dc reference level based on the peak output of the signal from which the ac signal will vary. 
C) A limiter sets a dc reference voltage that the ac signal varies upon while the clamper limits the peak output. 
D) none of the above

Question 6

Which statement best describes the action of an OTA amplitude modulator?

Accepted Answer

A) The power supply bias adjusts the output level. 
B) Variations of light intensity adjust the gain of the amplifier. 
C) The variations of voltages applied to the current bias input adjusts the gain of the amplifier. 
D) The OTA is versatile and can be configured to work in any of these ways. 
A) The power supply bias adjusts the output level. 
B) Variations of light intensity adjust the gain of the amplifier. 
C) The variations of voltages applied to the current bias input adjusts the gain of the amplifier. 
D) The OTA is versatile and can be configured to work in any of these ways.

Question 7

The OTA is a voltage-to-current amplifier.

Accepted Answer

A) True 
 B)False

Question 8

Most isolation amplifiers use transformer coupling for isolation.

Accepted Answer

A) True 
 B)False

Question 9

OTA stands for operational transistor amplifier.

Accepted Answer

A) True 
 B)False

Question 10

In some respects an isolation amplifier is nothing more than an elaborate:

Accepted Answer

A) instrumentation amplifier. 
B) op amp. 
C) rectifier and filter. 
D) both A and B 
A) instrumentation amplifier. 
B) op amp. 
C) rectifier and filter. 
D) both A and B

Question 11

An instrumentation amplifier has a high:

Accepted Answer

A) output impedance. 
B) supply voltage. 
C) CMRR. 
D) power gain. 
A) output impedance. 
B) supply voltage. 
C) CMRR. 
D) power gain.

Question 12

-The input signal for an instrumentation amplifier usually comes from:

Accepted Answer

A) a transducer. 
B) an inverting amplifier. 
C) a wheatstone bridge. 
D) a differential amplifier. 
A) a transducer. 
B) an inverting amplifier. 
C) a wheatstone bridge. 
D) a differential amplifier.

Question 13

The main purpose of an instrumentation amplifier is to amplify common mode voltage.

Accepted Answer

A) True 
 B)False

Question 14

The voltage gain of an instrumentation amplifier is set with an external resistor.

Accepted Answer

A) True 
 B)False

Question 15

-Refer to Figure 20-2 (b). If   the load current   would be:

Accepted Answer

A) 2.08 mA. 
B) 2.08 A. 
C) 208 A. 
D) 20.8 mA. 
A) 2.08 mA. 
B) 2.08 A. 
C) 208 A. 
D) 20.8 mA.

Question 16

When using an OTA in a Schmitt-trigger configuration, the trigger points are controlled by:

Accepted Answer

A)    
B)    
C)    
D) both A and B. 
A)    
B)    
C)    
D) both A and B.

Question 17

-Refer to Figure 20-2. Which of these circuits is known as a current-to-voltage converter?

Accepted Answer

A) (a) 
B) (b) 
C) (c) 
D) (d) 
A) (a) 
B) (b) 
C) (c) 
D) (d)

Question 18

-In the classic three op-amp instrumentation amplifier, the differential voltage gain is usually produced by the:

Accepted Answer

A) second stage. 
B) output op amp. 
C) mismatched resistors. 
D) first stage. 
A) second stage. 
B) output op amp. 
C) mismatched resistors. 
D) first stage.

Question 19

-Refer to Figure 20-1. Which of these circuits is known as an isolation amplifier?

Accepted Answer

A) (a) 
B) (b) 
C) (c) 
D) (d) 
A) (a) 
B) (b) 
C) (c) 
D) (d)

Question 20

-Refer to Figure 20-2. Which of these circuits is known as a peak detector?

Accepted Answer

A) (a) 
B) (b) 
C) (c) 
D) (d) 
A) (a) 
B) (b) 
C) (c) 
D) (d)

Exam 20: Time Response of Reactive Circuits

How many op-amps does the basic instrumentation amplifier consist of?

The voltage gain of an OTA can be calculated using the formula:

-Refer to Figure 20-2. Which of these circuits is known as a voltage-to-current converter?

-Refer to Figure 20-1 (a). If and the closed loop gain is 450, the value of the external gain-setting resistor RG is:

Which statement best differentiates between limiter and clamper circuits?

Which statement best describes the action of an OTA amplitude modulator?

The OTA is a voltage-to-current amplifier.

Most isolation amplifiers use transformer coupling for isolation.

OTA stands for operational transistor amplifier.

In some respects an isolation amplifier is nothing more than an elaborate:

An instrumentation amplifier has a high:

-The input signal for an instrumentation amplifier usually comes from:

The main purpose of an instrumentation amplifier is to amplify common mode voltage.

The voltage gain of an instrumentation amplifier is set with an external resistor.

-Refer to Figure 20-2 (b). If the load current would be:

When using an OTA in a Schmitt-trigger configuration, the trigger points are controlled by:

-Refer to Figure 20-2. Which of these circuits is known as a current-to-voltage converter?

-In the classic three op-amp instrumentation amplifier, the differential voltage gain is usually produced by the:

-Refer to Figure 20-1. Which of these circuits is known as an isolation amplifier?

-Refer to Figure 20-2. Which of these circuits is known as a peak detector?

Quantities and Units

Voltage, Current, and Resistance

Ohms Law

Energy and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Circuit Theorems and Conversions

Branch, Loop, and Node Analyses

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Inductors

Transformers

RC Circuits

RL Circuits

RlC Circuits and Resonance

Passive Filters

Circuit Theorems in Ac Analysis

Three-Phase Systems in Power Applications

Filters