Question 1

The voltages applied to the input of any standard TTL series IC must never exceed +5.5 v because:

Accepted Answer

A)  a greater voltage applied to a collector can cause a reverse breakdown of the B- C junction. 
B)  a greater voltage applied to a base input can cause reverse breakdown of the E- B junction Of Q1. 
C)  a greater voltage applied to an emitter input can cause reverse breakdown of the E- B junction Of Q1. 
D)  a greater voltage applied to a base can cause a reverse breakdown of the B- C junction. 
A)  a greater voltage applied to a collector can cause a reverse breakdown of the B- C junction. 
B)  a greater voltage applied to a base input can cause reverse breakdown of the E- B junction Of Q1. 
C)  a greater voltage applied to an emitter input can cause reverse breakdown of the E- B junction Of Q1. 
D)  a greater voltage applied to a base can cause a reverse breakdown of the B- C junction.

Question 2

In digital circuits, one MOSFET (Q1) is usually used as the:

Accepted Answer

A)  input MOSFET for other MOSFETs in the circuit. 
B)  load resistor for the switching MOSFET. 
C)  buffer MOSFET for the other MOSFETs. 
D)  None of the above 
A)  input MOSFET for other MOSFETs in the circuit. 
B)  load resistor for the switching MOSFET. 
C)  buffer MOSFET for the other MOSFETs. 
D)  None of the above

Question 3

It is standard practice to connect a single large capacitor between Vcc and______ on each circuit board to filter out the variations in Vcc caused by changes in Icc levels as outputs switch states.

Accepted Answer

Question 4

TTL NOR and NAND gates use multiple- emitter transistors on their inputs.

Accepted Answer

A) True 
 B)False

Question 5

The term that describes the maximum number of standard logic inputs that an IC output can drive reliably is:

Accepted Answer

A)  power requirements. 
B)  noise immunity. 
C)  speed- power product. 
D)  fan- out 
A)  power requirements. 
B)  noise immunity. 
C)  speed- power product. 
D)  fan- out

Question 6

TTL loading is the sum of the input ______.

Accepted Answer

The answer of TTL loading is the sum of the...

Question 7

When totem pole outputs are tied together:

Accepted Answer

A)  nothing unusual happens. 
B)  a wired- AND condition safely exists. 
C)  the HIGH state prevails. 
D)  eventual, if not immediate, damage may occur. 
A)  nothing unusual happens. 
B)  a wired- AND condition safely exists. 
C)  the HIGH state prevails. 
D)  eventual, if not immediate, damage may occur.

Question 8

The Quartus II software has two tools that are used to estimate power consumption. The PowerPlay Power Analyzer is used ______ .

Accepted Answer

A)  only for minimum clocking speeds 
B)  later in the design process 
C)  earlier in the design process 
D)  to get an exact power consumption value 
A)  only for minimum clocking speeds 
B)  later in the design process 
C)  earlier in the design process 
D)  to get an exact power consumption value

Question 9

The two primary advantages to using a totem- pole output circuit in TTL logic devices are:

Accepted Answer

A)  increased power dissipation and slow rise- time waveforms at TTL outputs with capacitive loads. 
B)  reduced power dissipation and fast rise- time waveforms at TTL outputs with capacitive loads. 
C)  increased power dissipation and fast rise- time waveforms at TTL outputs with capacitive loads. 
D)  reduced power dissipation and slow rise- time waveforms at TTL outputs with capacitive loads. 
A)  increased power dissipation and slow rise- time waveforms at TTL outputs with capacitive loads. 
B)  reduced power dissipation and fast rise- time waveforms at TTL outputs with capacitive loads. 
C)  increased power dissipation and fast rise- time waveforms at TTL outputs with capacitive loads. 
D)  reduced power dissipation and slow rise- time waveforms at TTL outputs with capacitive loads.

Question 10

A single rating that is commonly used to compare the propagation delay and power dissipation characteristics of various circuits is the:

Accepted Answer

A)  noise immunity factor. 
B)  power- delay rating. 
C)  speed- power product. 
D)  fan- out. 
A)  noise immunity factor. 
B)  power- delay rating. 
C)  speed- power product. 
D)  fan- out.

Question 11

The logic devices that are most commonly used to drive a wired- AND circuit are:

Accepted Answer

A)  open- collector TTL devices. 
B)  standard TTL output totem- pole devices. 
C)  CMOS devices. 
D)  MOS devices. 
A)  open- collector TTL devices. 
B)  standard TTL output totem- pole devices. 
C)  CMOS devices. 
D)  MOS devices.

Question 12

______is defined as the maximum number of standard logic inputs that an output can drive reliably.

Accepted Answer

The answer of ______is defined as the maximum number of...

Question 13

The word interface, as applied to digital electronics, usually refers to:

Accepted Answer

A)  a circuit connected between the driver and load to condition a signal so that it is compatible with the load. 
B)  any gate that is a TTL operational amplifier designed to condition signals between N- MOS transistors. 
C)  any TTL circuit that is an input buffer stage. 
D)  a conditioning circuit connected between a standard TTL NAND gate and a standard TTL OR gate. 
A)  a circuit connected between the driver and load to condition a signal so that it is compatible with the load. 
B)  any gate that is a TTL operational amplifier designed to condition signals between N- MOS transistors. 
C)  any TTL circuit that is an input buffer stage. 
D)  a conditioning circuit connected between a standard TTL NAND gate and a standard TTL OR gate.

Question 14

A shorted input to ground or output to ground can be detected using:

Accepted Answer

A)  a current tracer. 
B)  a pulser. 
C)  a logic probe. 
D)  Both A and B 
A)  a current tracer. 
B)  a pulser. 
C)  a logic probe. 
D)  Both A and B

Question 15

The VOH(min) rating of a TTL gate is lower than the VIH(min) rating of a CMOS gate. Which of the following is commonly used to overcome this problem?

Accepted Answer

A)  Adding a fixed voltage divider bias resistive network at the output of the TTL device 
B)  Adding an external pull- up resistor to Vcc 
C)  Adding an external pull- down resistor to ground 
D)  Avoiding this condition and only using TTL to drive TTL 
A)  Adding a fixed voltage divider bias resistive network at the output of the TTL device 
B)  Adding an external pull- up resistor to Vcc 
C)  Adding an external pull- down resistor to ground 
D)  Avoiding this condition and only using TTL to drive TTL

Question 16

The TTL IC chip parameter that defines the input voltage level required for a logical "1" at an input is:

Accepted Answer

A)  VOH(min). 
B)   VIL(max).  
C)  VOL(max).  
D)  VIH(min). 
A)  VOH(min). 
B)   VIL(max).  
C)  VOL(max).  
D)  VIH(min).

Question 17

The value of VCCIO for the Cyclone II chips is determined by the desired output logic level.

Accepted Answer

A) True 
 B)False

Question 18

Devices with ______outputs can have their outputs connected together safely.

Accepted Answer

The answer of Devices with ______outputs can have their outputs...

Question 19

Which of the following IC logic families are most susceptible to static discharge?

Accepted Answer

A)  MOS 
B)  ECL 
C)  TTL 
D)  CML 
A)  MOS 
B)  ECL 
C)  TTL 
D)  CML

Question 20

A logic pulser can drive virtually any input momentarily due to its extremely low output impedance.

Accepted Answer

A) True 
 B)False

The voltages applied to the input of any standard TTL series IC must never exceed +5.5 v because:

In digital circuits, one MOSFET (Q₁₎is usually used as the:

It is standard practice to connect a single large capacitor between V_ccand______ on each circuit board to filter out the variations in V_cccaused by changes in I_cclevels as outputs switch states.

TTL NOR and NAND gates use multiple- emitter transistors on their inputs.

The term that describes the maximum number of standard logic inputs that an IC output can drive reliably is:

TTL loading is the sum of the input ______.

When totem pole outputs are tied together:

The Quartus II software has two tools that are used to estimate power consumption. The PowerPlay Power Analyzer is used ______ .

The two primary advantages to using a totem- pole output circuit in TTL logic devices are:

A single rating that is commonly used to compare the propagation delay and power dissipation characteristics of various circuits is the:

The logic devices that are most commonly used to drive a wired- AND circuit are:

______is defined as the maximum number of standard logic inputs that an output can drive reliably.

The word interface, as applied to digital electronics, usually refers to:

A shorted input to ground or output to ground can be detected using:

The V_OH(min)rating of a TTL gate is lower than the V_IH(min)rating of a CMOS gate. Which of the following is commonly used to overcome this problem?

The TTL IC chip parameter that defines the input voltage level required for a logical "1" at an input is:

The value of V_CCIOfor the Cyclone II chips is determined by the desired output logic level.

Devices with ______outputs can have their outputs connected together safely.

Which of the following IC logic families are most susceptible to static discharge?

A logic pulser can drive virtually any input momentarily due to its extremely low output impedance.

Introductory Concepts

Number Systems and Codes

Describing Logic Circuits

Combinational Logic Circuits

Flip-Flops and Related Devices

Digital Arithmetic: Operations and Circuits

Counters and Registers

MSI Logic Circuits

Digital System Projects Using HDL

Interfacing With the Analog World

Memory Devices

Programmable Logic Device Architectures

Filters

Exam 8: Integrated-Circuit Logic Families

The voltages applied to the input of any standard TTL series IC must never exceed +5.5 v because:

In digital circuits, one MOSFET (Q1) is usually used as the:

It is standard practice to connect a single large capacitor between Vcc and______ on each circuit board to filter out the variations in Vcc caused by changes in Icc levels as outputs switch states.

TTL NOR and NAND gates use multiple- emitter transistors on their inputs.

The term that describes the maximum number of standard logic inputs that an IC output can drive reliably is:

TTL loading is the sum of the input ______.

When totem pole outputs are tied together:

The Quartus II software has two tools that are used to estimate power consumption. The PowerPlay Power Analyzer is used ______ .

The two primary advantages to using a totem- pole output circuit in TTL logic devices are:

A single rating that is commonly used to compare the propagation delay and power dissipation characteristics of various circuits is the:

The logic devices that are most commonly used to drive a wired- AND circuit are:

______is defined as the maximum number of standard logic inputs that an output can drive reliably.

The word interface, as applied to digital electronics, usually refers to:

A shorted input to ground or output to ground can be detected using:

The VOH(min) rating of a TTL gate is lower than the VIH(min) rating of a CMOS gate. Which of the following is commonly used to overcome this problem?

The TTL IC chip parameter that defines the input voltage level required for a logical "1" at an input is:

The value of VCCIO for the Cyclone II chips is determined by the desired output logic level.

Devices with ______outputs can have their outputs connected together safely.

Which of the following IC logic families are most susceptible to static discharge?

A logic pulser can drive virtually any input momentarily due to its extremely low output impedance.

Introductory Concepts

Number Systems and Codes

Describing Logic Circuits

Combinational Logic Circuits

Flip-Flops and Related Devices

Digital Arithmetic: Operations and Circuits

Counters and Registers

MSI Logic Circuits

Digital System Projects Using HDL

Interfacing With the Analog World

Memory Devices

Programmable Logic Device Architectures

Filters

In digital circuits, one MOSFET (Q₁₎is usually used as the:

It is standard practice to connect a single large capacitor between V_ccand______ on each circuit board to filter out the variations in V_cccaused by changes in I_cclevels as outputs switch states.

The V_OH(min)rating of a TTL gate is lower than the V_IH(min)rating of a CMOS gate. Which of the following is commonly used to overcome this problem?

The value of V_CCIOfor the Cyclone II chips is determined by the desired output logic level.