Introduction to Logic Functions, AND/OR Gates

Question 1

The ______ is represented by the rounded rectangle symbol.

Answer 1

AND gate

Question 2

The function of an AND gate is to determine when all input conditions are _____ at the same time. A HIGH output is only available when all the inputs are ____ or _____.

Answer 2

The function of an AND gate is to determine when all input conditions are TRUE at the same time. A HIGH output is only available when all the inputs are HIGH or TRUE.

Question 3

When ALL inputs to the AND gate are HIGH, the gate produces a ______ output.

If any input is LOW, the gate produces a ______ output.

Answer 3

When ALL inputs to the AND gate are HIGH, the gate produces a HIGH output.

If any input is LOW, the gate produces a LOW output.

Question 4

The OR logic function produces a HIGH output if any input is ______.

Answer 4

The OR logic function produces a HIGH output if any input is HIGH.

Question 5

How does the NOT logic fuction?

Answer 5

The NOT logic function inverts the input signal, producing the opposite signal as the output.

The NOT function is used with the AND and OR functions to change their output when the opposite condition is needed.

Question 6

The AND function is represented by the “__” symbol. The Boolean equation for the AND function is “A____B”.

Answer 6

The AND function is represented by the “•” symbol. The Boolean equation for the AND function is “A • B”.

Question 7

The OR function is represented by the “___” symbol. The Boolean equation for the OR function is “A ___ B”.

Answer 7

The OR function is represented by the “+” symbol. The Boolean equation for the OR function is “A + B”.

Question 8

The NOT function is represented by the “___” (macron) symbol placed ___ the value. For example, the Boolean equation for the NOT function is “A”.

Answer 8

The NOT function is represented by the “–” (macron) symbol placed over the value. For example, the Boolean equation for the NOT function is “A”.

A is pronounced “NOT A”. When you see the NOT equation, you’ll know that what’s being stated is, “If input A is HIGH, the output is A or LOW.”

Question 9

The ______ is represented by the rounded triangle symbol.

Answer 9

OR gate

Question 10

The function of an OR gate is to determine when at least one input condition is TRUE. A _____output is available when any input is ______.

Answer 10

The function of an OR gate is to determine when at least one input condition is TRUE. A HIGH output is available when any input is HIGH.

Question 11

Generally, inputs to an OR/AND gate are voltages or pulsed waveforms that change between two ______.

Answer 11

Generally, inputs to an OR/AND gate are voltages or pulsed waveforms that change between two logic levels.

LOGIC LEVELS - Logic levels represent HIGH or LOW conditions.