Chapter 3 Basic Logic Gates Digital Fundamental

Front 1

the basic building blocks for forming circuitry

Back 1

logic gates

Front 2

what are the 5 basic logic gates

Back 2

AND, OR, NAND, NOR

Front 3

what is the purpose of a truth table?

Back 3

to illustrate how the output level of a gate responds to all possible input level combinations

Front 4

what is the purpose of a boolean equation?

Back 4

to depict algebraically the operation of a logic gate

Front 5

all inputs to an and gate must be high for it to output a high. true or false

Back 5

true

Front 6

what input conditions must be satisfied for the output of an OR gate to be low?

Back 6

all inputs must be low

Front 7

describe the purpose of a timing diagram

Back 7

to illustrate graphically how the output levels change in response to input level changes

Front 8

under what circumstances would diagonal don't care hash marks be used in a timing diagram

Back 8

when the level of an input signal will have no effect on the output

Front 9

the 7408 is a

Back 9

quad 2 input and gate

Front 10

the 7411 is a

Back 10

triple 3 input and gate

Front 11

the 7421 is a

Back 11

dual four input and gate

Front 12

the 7432 is a

Back 12

quad 2 input or gate

Front 13

4 common circuit faults

Back 13

1. misalignment of a pin
2. cracked board
3. solder bridged
4. burned transistor

Front 14

which pins on the 7408 AND IC are used for power supply connections, and what voltage levels are placed on those pins

Back 14

5v on pin 14 for power, 0 v on pin 7 for ground

Front 15

how is the logic probe used to troubleshoot digital ICs

Back 15

used an indicator lamp to tell you the digital level

Front 16

how is a logic pulser used to troubleshoot digital ICs

Back 16

provides digital pulses to the circuit being tested, observed using the probe

Front 17

what is the purpose of an inverter

Back 17

to complement or invert a digital signal

Front 18

how does the NAND gate differ from an AND gate?

Back 18

a NAND gate is an AND gate with an inverter on its output

Front 19

the output of a NAND gate is always high unless all inputs are made

Back 19

high

Front 20

write the boolean equation for a three input NOR gate

Back 20

!

Front 21

what is the function of the Johnson shift counter in this chapter

Back 21

used as a repetitive waveform generator

Front 22

the AND gate requires that all inputs are HIGH to get a _____ output

Back 22

High

Front 23

the OR gate outputs a HIGH if any of its inputs are _____

Back 23

High

Front 24

effective way to measure precise timing of waveforms by using

Back 24

oscilloscope or a logic analyzer

Front 25

AND or OR gates can also be used to enable or disable a

Back 25

signal from one point to another

Front 26

provides an output that is the complement of its input

Back 26

inverter

Front 27

a NAND gate outputs a LOW when sll of its inputs are

Back 27

HIGH

Front 28

a NOR gate outputs a HIGH when all of its inputs are

Back 28

LOW

Front 29

can be created by using a repetitive waveform generator and the basic gates

Back 29

waveforms

Front 30

used by tech to find the pin configuration

Back 30

manufacturers data manuals

Front 31

the exclusive OR gate is the complement (inverse) of the OR gate. True or False

Back 31

false

Front 32

the exclusive OR gate is the complement of the exclusive NOR gate

Back 32

true