5.5 Logic Circuits

Question 1

What does binary 0 typically represent?

Answer 1

0 Volts

Question 2

What does Binary 1 typically Represent?

Answer 2

+5 Volts

Question 3

What does Binary 0 actually represent?

Answer 3

0 to 0.8V

Question 4

What does Binary 1 actually represent?

Answer 4

2 and 5 Volts

Question 5

Boolean 0 and 1 do not represent actual numbers but the state of a voltage variable, which is called?

Answer 5

Logic Level

Question 6

In Boolean algebra what are the 3 basic operations?

Answer 6

AND, OR, NOT

Question 7

Logic circuits are formed by?

Answer 7

Combining many logic gates.

Question 8

What gate is this?

Answer 8

OR

Question 9

Which gate does this table belong to?

Answer 9

OR

Question 10

Which gate does this circuit belong to?

Answer 10

OR

Question 11

Which gate is this?

Answer 11

AND

Question 12

Which gate does this table belong to?

Answer 12

AND

Question 13

Which gate does this circuit belong to?

Answer 13

AND

Question 14

What does the small circle on a gate denote?

Answer 14

Inversion

Question 15

Which gate is this?

Answer 15

NOT

Question 16

Which gate does this table belong to?

Answer 16

NOT

Question 17

How are 3 input AND gates constructed?

Answer 17

By adding 2 AND gates together.

Question 18

If at the end of any logic gate circuit it ends with an OR gate and has a single input of 1 what will the output be?

Answer 18

Always 1.

Question 19

Which gate is this?

Answer 19

NAND

Question 20

Which gate is this?

Answer 20

NOR

Question 21

Which gate does this circuit belong to?

Answer 21

NOR, Note switches below output

Question 22

What are the Universal gates?

Answer 22

NOR and the NAND

Question 23

Describe the Buffer.

Answer 23

Single input device which has a gain of 1 , mirroring the input at the output.

Question 24

Describe the inverting buffer

Answer 24

Single input device producing the state opposite of the input

Question 25

What do these 2 IEEE symbols represent?

Answer 25

Buffer (Top) and Inverting Buffer

Question 26

What is the purpose of a Flip Flop?

Answer 26

It stores a Single Bit of Binary data, it will maintain a state of 1 or 0 until directed to change its state.

Question 27

What are the common applications of Flip Flops?

Answer 27

Counters, Registers, Frequency Divider Circuits and Data Transfer.

Question 28

A circuit that has 2 stable states is called a?

Answer 28

Flip flop or Latch Circuit.

Question 29

What is required to latch an SR Flip Flop Circuit?

Answer 29

A Pulsed input.

Question 30

Describe what happens in an Invalid State.

Answer 30

When the inputs cause the outputs to be either all high or all low.

Question 31

When is a NAND SR in the invalid state?

Answer 31

Both inputs LOW

Question 32

When is a NOR SR in an invalid state?

Answer 32

Both inputs HI

Question 33

What can be used to prevent the presence of switch bounce?

Answer 33

NAND latch.