Question 1

In order to use a derating curve of a large power transistor

Accepted Answer

A)  you must know the case temperature for the worst case. 
B)  you must use an npn transistor. 
C)  you must have a schematic diagram of the transistor. 
D)  you must reduce the ambient temperature. 
A)  you must know the case temperature for the worst case. 
B)  you must use an npn transistor. 
C)  you must have a schematic diagram of the transistor. 
D)  you must reduce the ambient temperature.

Question 2

The efficiency of a power amplifier is equal to the

Accepted Answer

A)  ac output power divided by the dc input power. 
B)  ac output power divided by the ac input power. 
C)  dc output power divided by the dc input power. 
D)  dc output power divided by the ac input power. 
A)  ac output power divided by the dc input power. 
B)  ac output power divided by the ac input power. 
C)  dc output power divided by the dc input power. 
D)  dc output power divided by the ac input power.

Question 3

When the emitter follower is used as a class A power amplifier at the end of a system,the operating point is typically located at the center of the ac load line

Accepted Answer

A)  to get maximum peak-to-peak output. 
B)  to reduce the peak-to-peak output. 
C)  to keep the amplifier close to saturation. 
D)  to assure that clipping takes place. 
A)  to get maximum peak-to-peak output. 
B)  to reduce the peak-to-peak output. 
C)  to keep the amplifier close to saturation. 
D)  to assure that clipping takes place.

Question 4

The typical class C amplifier has

Accepted Answer

A)  low efficiency. 
B)  a large duty cycle. 
C)  a small duty cycle. 
D)  no duty cycle. 
A)  low efficiency. 
B)  a large duty cycle. 
C)  a small duty cycle. 
D)  no duty cycle.

Question 5

An amplifier whose ac load is a high-Q resonant tank is

Accepted Answer

A)  an audio amplifier. 
B)  a wideband amplifier. 
C)  a dc amplifier. 
D)  a tuned RF amplifier. 
A)  an audio amplifier. 
B)  a wideband amplifier. 
C)  a dc amplifier. 
D)  a tuned RF amplifier.

Question 6

With a class A amplifier,collector current flows

Accepted Answer

A)  throughout the ac cycle. 
B)  for half the ac cycle. 
C)  for less than half of the ac cycle. 
D)  for 180° of the ac cycle. 
A)  throughout the ac cycle. 
B)  for half the ac cycle. 
C)  for less than half of the ac cycle. 
D)  for 180° of the ac cycle.

Question 7

If the operating point of an amplifier is at or near saturation

Accepted Answer

A)  the output signal will be distorted. 
B)  the collector current will be zero. 
C)  the output signal will be an exact reproduction of the input signal. 
D)  the input signal will be distorted. 
A)  the output signal will be distorted. 
B)  the collector current will be zero. 
C)  the output signal will be an exact reproduction of the input signal. 
D)  the input signal will be distorted.

Question 8

An amplifier's power gain equals

Accepted Answer

A)  ac input power divided by the ac output power. 
B)  ac output power divided by the ac input power. 
C)  ac output power divided by the power supply voltage. 
D)  ac output power divided by the ac input current. 
A)  ac input power divided by the ac output power. 
B)  ac output power divided by the ac input power. 
C)  ac output power divided by the power supply voltage. 
D)  ac output power divided by the ac input current.

In order to use a derating curve of a large power transistor

The efficiency of a power amplifier is equal to the

When the emitter follower is used as a class A power amplifier at the end of a system,the operating point is typically located at the center of the ac load line

The typical class C amplifier has

An amplifier whose ac load is a high-Q resonant tank is

With a class A amplifier,collector current flows

If the operating point of an amplifier is at or near saturation

An amplifier's power gain equals

Introduction

Semoconductors

Diode Theory Key

Diode Circuits

Special-Purpose Diodes Key

BJT Fumdamentals

BJT Biasing

Basic BJT Amplifiers

Multistage,CC,and CB Amplifiers

JFETS

Mosfets

Thyristors

Frequency Effects

Differential Amplifiers

Operational Amplifiers

Negative Feedback

Linear OP AMP Circuits

Active Filters Key

Nonlinear Op-Amp Circuit Applications Key

Oscillators Key

Regulated Power Supplies Key

Filters

Exam 10: Power Amplifiers

In order to use a derating curve of a large power transistor

The efficiency of a power amplifier is equal to the

When the emitter follower is used as a class A power amplifier at the end of a system,the operating point is typically located at the center of the ac load line

The typical class C amplifier has

An amplifier whose ac load is a high-Q resonant tank is

With a class A amplifier,collector current flows

If the operating point of an amplifier is at or near saturation

An amplifier's power gain equals

Introduction

Semoconductors

Diode Theory Key

Diode Circuits

Special-Purpose Diodes Key

BJT Fumdamentals

BJT Biasing

Basic BJT Amplifiers

Multistage,CC,and CB Amplifiers

JFETS

Mosfets

Thyristors

Frequency Effects

Differential Amplifiers

Operational Amplifiers

Negative Feedback

Linear OP AMP Circuits

Active Filters Key

Nonlinear Op-Amp Circuit Applications Key

Oscillators Key

Regulated Power Supplies Key

Filters