Logics 9: Latches and Flip Flops

Question 1

It is a type of temporary storage device that has two stable states and is normally placed in a category separate from that of flip-flops

Answer 1

Latch

Question 2

It means having two stable states

Answer 2

Bistable

Question 3

Is the simplest for of latches

Answer 3

Set-Reset (SR) Latch

Question 4

In an SR Latch, what is Q when S is 1 and R is 0?

Answer 4

1

Question 5

In an SR Latch, what is Q when S is 0 and R is 1?

Answer 5

0

Question 6

Are synchronous bistable devices

Answer 6

Flip-flops

Question 7

Another name for flip-flops

Answer 7

Bistable Multivibrators

Question 8

Are flip-flops edge-triggered or level-triggered?

Answer 8

edge-triggered

Question 9

Are latches edge-triggered or level-triggered?

Answer 9

level-triggered

Question 10

What value for S and R will an SR flip-flop be invalid?

Answer 10

S=R=1

Question 11

What happens to Q if J=K=1 in a JK flip-flop

Answer 11

Toggles

Question 12

What happens to Q if J=K=0 in a JK flip-flop

Answer 12

No Change

Question 13

Is the interval of time required after an input signal has been applied for the resulting output change to occur

Answer 13

Propagation Delay Time

Question 14

It is the minimum interval required for the logic levels to be maintained constantly on the inputs

Answer 14

Set-up Time

Question 15

It is the minimum interval required for the logic levels to remain on the inputs

Answer 15

Hold Time

Question 16

Is the highest rate at which a flip-flop can be reliably triggered

Answer 16

Maximum Clock Frequency

Question 17

It is the total power consumption of the device

Answer 17

Power Dissipation

Question 18

Are circuits whose outputs depends on the sequence of inputs applied and are analyzed with respect to time

Answer 18

Sequential Logic Circuits

Question 19

The reference of sequential circuit operation

Answer 19

Clock

Question 20

The output will remain in its present state until some input change is described

Answer 20

Stable State

Question 21

The output will change logic state after a given time, even if the inputs remain unchanged

Answer 21

Unstable State

Question 22

The process of connecting the output of the device to the input of the same device

Answer 22

Feedback

Question 23

The truth table used to analyze sequential circuits

Answer 23

State Table

Question 24

The time it takes the output of the device to respond to change in the inputs of the device

Answer 24

Propagation Delay

Question 25

A sequential circuit with one stable and one unstable state

Answer 25

Monostable Multivibrator

Question 26

The time that the one shot is in its unstable state

Answer 26

Pulse Width

Question 27

Also known as oscillator

Answer 27

Astable Multivibrator

Question 28

A sequential circuit with no stable state

Answer 28

Astable Multivibrator

Question 29

A linear IC capable of producing various types of oscillation timing waveforms and other digital waveform

Answer 29

555 Timer IC

Question 30

A type of circuit that causes a logic device to switch logic states abruptly at a specific input voltage

Answer 30

Schmitt Trigger Devices

Question 31

Sequential circuits with two stable states

Answer 31

Bistable Multivibrator

Question 32

A memory device capable of storing 1 bit of information

Answer 32

Latch

Question 33

Also known as a delay latch

Answer 33

D Latch

Question 34

A memory device capable of storing 1 bit of information

Answer 34

Flip-flops

Question 35

A flip-flop with no invalid state

Answer 35

JK Flip-flop

Question 36

Forces output to be high in flip-flop asynchronous inputs

Answer 36

PRE

Question 37

Forces output to be low in flip-flop asynchronous inputs

Answer 37

CLR

Question 38

A flip-flop circuit that is pulse triggered

Answer 38

Master-Slave Flip-Flop

Question 39

Is a device that generates binary number in a specified count sequence

Answer 39

Digital Counter

Question 40

The total number of states or values generated by the counter as it progresses through its specified count sequence

Answer 40

Count Modulus

Question 41

Counters with modulus of 10 and also known as MOD 10 counters

Answer 41

Decade Counter

Question 42

Counters with n bits that are also known as modulus of 2^n

Answer 42

Binary Counter

Question 43

The incoming clock signal of this is routed into the first stage of the counter which generates the LSB of the numbers in the count sequence

Answer 43

Asynchronous Counters

Question 44

It is constructed with one common clock signal as the input to all the flip-flops simultaneously

Answer 44

Synchronous Counters

Question 45

A special class of synchronous counter circuit designed from cascaded D flip-flops

Answer 45

Ring Counterss

Question 46

Produce but patterns that shifts through all counter stages

Answer 46

Ring Counters

Question 47

It cycles a single logic-HIGH output pulse through the stages of the counter

Answer 47

Basic Ring Counter

Question 48

It is also known as switch tail counter, Johnson counter, or moebus counter

Answer 48

Twisted Ring Counter

Question 49

It generates a count sequence where only one output changes between consecutive count states

Answer 49

Twisted Ring Counter