Question 1

In order to get single-ended input operation using a diff amp,one of the inputs is used and the other input is grounded.

Accepted Answer

A) True 
 B)False

Question 2

If compensation of an op amp becomes necessary,the best approach is to use

Accepted Answer

A)   nulling circuits.
B)   filtering circuits.
C)   squelching circuits.
D)   regulating circuits.E) All of the above
F) None of the above

Question 3

With diff amp configurations,when a single-ended output is used,the input may be noninverting or inverting.

Accepted Answer

A) True 
 B)False

Question 4

Ultra large scale integration refers to placing approximately how many components on a single chip?

Accepted Answer

A)   12 to 100
B)   more than 100
C)   thousands
D)   more than a millionE) All of the above
F) C) and D)

Question 5

The input offset voltage is defined as the input voltage that would produce the same output error voltage in a perfect diff amp.

Accepted Answer

A) True 
 B)False

Question 6

Data sheets generally specify common-mode rejection ratio in ________.

Accepted Answer

A)   mhos
B)   volts
C)   decibels
D)   joulesE) A) and B)
F) A) and C) C

Question 7

In an op amp,the average of the dc base currents is referred to as

Accepted Answer

A)   input offset current.
B)   input bias current.
C)   input average current.
D)   base average current.E) A) and B)
F) All of the above

Question 8

The input circuit used in most op amps is the common-collector amplifier.

Accepted Answer

A) True 
 B)False

Question 9

The + symbol when used with an input of an op amp represents

Accepted Answer

A)   the inverting input.
B)   the noninverting input.
C)   the differential input.
D)   the single-ended input.E) A) and B)
F) All of the above B

Question 10

Components that are easily fabricated on a chip do not include ________.

Accepted Answer

A)   transistors
B)   capacitors
C)   diodes
D)   resistorsE) A) and C)
F) All of the above

Question 11

What are typically used as current sources and active loads in the design of IC op amps?

Accepted Answer

A)   current limiters
B)   zener regulators
C)   current mirrors
D)   current ampsE) A) and C)
F) All of the above

Question 12

When the noninverting and inverting input voltages of a differential amp are present,the output voltage equals the voltage gain times the difference of the two input voltages.

Accepted Answer

A) True 
 B)False

Question 13

What is the common-mode voltage gain for the circuit shown in Figure 15-21?

Accepted Answer

A)   1
B)   0.5
C)   1.5
D)   2E) A) and D)
F) A) and C)

Question 14

When a diff amp is amplifying the wanted signal and discriminating against the common-mode signal the CMRR is

Accepted Answer

A)   high.
B)   low.
C)   less than 1.
D)   equal to the common-mode voltage gain divided by the voltage gain.E) None of the above
F) A) and C)

Question 15

The input offset current is defined as the difference of the dc base currents.

Accepted Answer

A) True 
 B)False

Question 16

The term operational amplifier refers to an amplifier that performs a mathematical operation.

Accepted Answer

A) True 
 B)False

Question 17

The input impedance of a diff amp is

Accepted Answer

A)   half as high as a single common-emitter stage.
B)   twice as high as a single common-emitter stage.
C)   the same as a single common-emitter stage.
D)   four times as high as a single common-emitter stage.E) A) and D)
F) B) and C)

Question 18

Which diff amp configuration produces the maximum voltage gain?

Accepted Answer

A)   differential input with differential output
B)   differential input with single-ended output
C)   single-ended input with differential output
D)   single-ended input with single-ended outputE) A) and B)
F) A) and C)

Question 19

Integrated circuits with fewer than 12 integrated components are referred to as

Accepted Answer

A)   small-scale integration.
B)   medium-scale integration.
C)   large-scale integration.
D)   very large scale integration.E) A) and C)
F) A) and B) A

Question 20

Data sheet characteristics that designers use for accurate answers do not include

Accepted Answer

A)   input bias current.
B)   input offset current.
C)   input offset resistance.
D)   input offset voltage.E) A) and C)
F) All of the above

Exam 15: Differential Amplifiers

In order to get single-ended input operation using a diff amp,one of the inputs is used and the other input is grounded.

Correct AnswerverifiedShow Answer

If compensation of an op amp becomes necessary,the best approach is to use

Correct AnswerverifiedShow Answer

With diff amp configurations,when a single-ended output is used,the input may be noninverting or inverting.

Correct AnswerverifiedShow Answer

Ultra large scale integration refers to placing approximately how many components on a single chip?

Correct AnswerverifiedShow Answer

The input offset voltage is defined as the input voltage that would produce the same output error voltage in a perfect diff amp.

Correct AnswerverifiedShow Answer

Data sheets generally specify common-mode rejection ratio in ________.

Correct AnswerverifiedC

In an op amp,the average of the dc base currents is referred to as

Correct AnswerverifiedShow Answer

The input circuit used in most op amps is the common-collector amplifier.

Correct AnswerverifiedShow Answer

The + symbol when used with an input of an op amp represents

Correct AnswerverifiedB

Components that are easily fabricated on a chip do not include ________.

Correct AnswerverifiedShow Answer

What are typically used as current sources and active loads in the design of IC op amps?

Correct AnswerverifiedShow Answer

When the noninverting and inverting input voltages of a differential amp are present,the output voltage equals the voltage gain times the difference of the two input voltages.

Correct AnswerverifiedShow Answer

What is the common-mode voltage gain for the circuit shown in Figure 15-21?

Correct AnswerverifiedShow Answer

When a diff amp is amplifying the wanted signal and discriminating against the common-mode signal the CMRR is

Correct AnswerverifiedShow Answer

The input offset current is defined as the difference of the dc base currents.

Correct AnswerverifiedShow Answer

The term operational amplifier refers to an amplifier that performs a mathematical operation.

Correct AnswerverifiedShow Answer

The input impedance of a diff amp is

Correct AnswerverifiedShow Answer

Which diff amp configuration produces the maximum voltage gain?

Correct AnswerverifiedShow Answer

Integrated circuits with fewer than 12 integrated components are referred to as

Correct AnswerverifiedA

Data sheet characteristics that designers use for accurate answers do not include

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified