Question 1

The depletion-mode MOSFET or D-MOSFET is a normally off device.

Accepted Answer

A) True 
 B)False  False

Question 2

A p-channel D-MOSFET consists of a drain-to-source p-channel,along with an n-type substrate.

Accepted Answer

A) True 
 B)False  True

Question 3

The main advantage of CMOS is its

Accepted Answer

A)  extremely high voltage gain. 
B)  low output impedance. 
C)  low cost. 
D)  extremely low power consumption. 
A)  extremely high voltage gain. 
B)  low output impedance. 
C)  low cost. 
D)  extremely low power consumption. D

Question 4

A simple computer circuit that causes its output voltage to be opposite of the input voltage is the

Accepted Answer

A)  comparator 
B)  amplifier 
C)  converter 
D)  inverter 
A)  comparator 
B)  amplifier 
C)  converter 
D)  inverter

Question 5

In the circuit shown in Figure 12-16 (a),when the input voltage is 0 V,what is the current flowing through the relay contacts and the 15 Ω resistor?

Accepted Answer

A)  8 mA 
B)  8 A 
C)  48 mA 
D)  0 A 
A)  8 mA 
B)  8 A 
C)  48 mA 
D)  0 A

Question 6

Why are some MOSFETs manufactured with built-in zener diodes in parallel with the gate and the source?

Accepted Answer

A)  to regulate output voltages 
B)  to prevent damage from static charges 
C)  to rectify ac input 
D)  to produce filtered dc output 
A)  to regulate output voltages 
B)  to prevent damage from static charges 
C)  to rectify ac input 
D)  to produce filtered dc output

Question 7

What is the drain saturation current in the circuit shown in Figure 12-15 (a)?

Accepted Answer

A)  4.5 mA 
B)  45 mA 
C)  20 mA 
D)  200 mA 
A)  4.5 mA 
B)  45 mA 
C)  20 mA 
D)  200 mA

Question 8

When the gate voltage of an E-MOSFET is well above the threshold voltage

Accepted Answer

A)  the device switches from cutoff to saturation. 
B)  the device is biased as a linear amplifier. 
C)  the device will stay at saturation. 
D)  the device will stay at cutoff. 
A)  the device switches from cutoff to saturation. 
B)  the device is biased as a linear amplifier. 
C)  the device will stay at saturation. 
D)  the device will stay at cutoff.

Question 9

The circuit shown in Figure 12-22 (a)is

Accepted Answer

A)  a small-signal amplifier. 
B)  a multiplexer. 
C)  an inverter. 
D)  a power amplifier. 
A)  a small-signal amplifier. 
B)  a multiplexer. 
C)  an inverter. 
D)  a power amplifier.

Question 10

In the circuit shown in Figure 12-16,if the LED drops 2 V and the input voltage is +4.5 V,what is the drain current?

Accepted Answer

A)  20 mA 
B)  0 mA 
C)  18 mA 
D)  4.5 mA 
A)  20 mA 
B)  0 mA 
C)  18 mA 
D)  4.5 mA

Question 11

A signal that is continuous like a sine wave is referred to as ________.

Accepted Answer

A)  analog 
B)  digital 
C)  truncated 
D)  chopped 
A)  analog 
B)  digital 
C)  truncated 
D)  chopped

Question 12

A device that consists of thousands of microscopically small transistors is

Accepted Answer

A)  a wideband amplifier. 
B)  a digital gate. 
C)  an IC. 
D)  an FET. 
A)  a wideband amplifier. 
B)  a digital gate. 
C)  an IC. 
D)  an FET.

Question 13

A circuit that converts an input direct current voltage to an output dc voltage that is either higher or lower is called

Accepted Answer

A)  an inverter. 
B)  a multiplexer. 
C)  a dc-to-ac converter. 
D)  a dc-to-dc converter. 
A)  an inverter. 
B)  a multiplexer. 
C)  a dc-to-ac converter. 
D)  a dc-to-dc converter.

Question 14

The most effective method of testing a MOSFET device is by using

Accepted Answer

A)  a DMM. 
B)  an ohmmeter. 
C)  a curve tracer. 
D)  an oscilloscope. 
A)  a DMM. 
B)  an ohmmeter. 
C)  a curve tracer. 
D)  an oscilloscope.

Question 15

Since the conducting channel of a VMOS is much wider along both sides of the V groove

Accepted Answer

A)  the current can be much larger. 
B)  the current is much smaller. 
C)  there is much less distortion. 
D)  the input resistance is much lower. 
A)  the current can be much larger. 
B)  the current is much smaller. 
C)  there is much less distortion. 
D)  the input resistance is much lower.

Question 16

The word digital means continuous,like a sine wave.

Accepted Answer

A) True 
 B)False

Question 17

When two bipolar junction transistors are connected in parallel,the transistor with the lower VBE takes more collector current than the others in a condition known as

Accepted Answer

A)  current matching. 
B)  current draining. 
C)  current hogging. 
D)  current flowing. 
A)  current matching. 
B)  current draining. 
C)  current hogging. 
D)  current flowing.

Question 18

Why does only negligible gate current flow,in a depletion-mode MOSFET,even when the gate voltage is positive?

Accepted Answer

A)  resistance of the channel is high 
B)  source is grounded 
C)  metallic gate is insulated 
D)  drain is grounded 
A)  resistance of the channel is high 
B)  source is grounded 
C)  metallic gate is insulated 
D)  drain is grounded

Question 19

Depletion-mode MOSFETs can operate with only a positive gate voltage.

Accepted Answer

A) True 
 B)False

Question 20

When the gate voltage is zero,the E-MOSFET is

Accepted Answer

A)  off. 
B)  on. 
C)  in saturation. 
D)  biased in the active region. 
A)  off. 
B)  on. 
C)  in saturation. 
D)  biased in the active region.

Exam 12: Mosfets

The depletion-mode MOSFET or D-MOSFET is a normally off device.

A p-channel D-MOSFET consists of a drain-to-source p-channel,along with an n-type substrate.

The main advantage of CMOS is its

A simple computer circuit that causes its output voltage to be opposite of the input voltage is the

In the circuit shown in Figure 12-16 (a),when the input voltage is 0 V,what is the current flowing through the relay contacts and the 15 Ω resistor?

Why are some MOSFETs manufactured with built-in zener diodes in parallel with the gate and the source?

What is the drain saturation current in the circuit shown in Figure 12-15 (a)?

When the gate voltage of an E-MOSFET is well above the threshold voltage

The circuit shown in Figure 12-22 (a)is

In the circuit shown in Figure 12-16,if the LED drops 2 V and the input voltage is +4.5 V,what is the drain current?

A signal that is continuous like a sine wave is referred to as ________.

A device that consists of thousands of microscopically small transistors is

A circuit that converts an input direct current voltage to an output dc voltage that is either higher or lower is called

The most effective method of testing a MOSFET device is by using

Since the conducting channel of a VMOS is much wider along both sides of the V groove

The word digital means continuous,like a sine wave.

When two bipolar junction transistors are connected in parallel,the transistor with the lower VBE takes more collector current than the others in a condition known as

Why does only negligible gate current flow,in a depletion-mode MOSFET,even when the gate voltage is positive?

Depletion-mode MOSFETs can operate with only a positive gate voltage.

When the gate voltage is zero,the E-MOSFET is

Introduction

Semoconductors

Diode Theory Key

Diode Circuits

Special-Purpose Diodes Key

BJT Fumdamentals

BJT Biasing

Basic BJT Amplifiers

Multistage,CC,and CB Amplifiers

Power Amplifiers

JFETS

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

When two bipolar junction transistors are connected in parallel,the transistor with the lower V_BE takes more collector current than the others in a condition known as