Logic gates

What this lesson covers

• Identify the standard logic gate symbols
• Describe NOT, AND, OR, NAND, NOR and XOR

Key vocabulary

Boolean logic

Logic where every value is either TRUE (1) or FALSE (0).

Logic gate

An electronic component that produces one binary output from one or more binary inputs.

NOT

Outputs the opposite of its single input.

AND

Outputs 1 only when both inputs are 1.

OR

Outputs 1 when either input, or both, is 1.

NAND

NOT AND: outputs 0 only when both inputs are 1.

NOR

NOT OR: outputs 1 only when both inputs are 0.

XOR

Exclusive OR: outputs 1 when the inputs are different.

Check your learning

• Quick check: 4 questions
• Key vocabulary test: 8 terms
• Activity 1: Name the gate · 8 questions
• Activity 2: What's the output? · 8 questions
• Activity 3: TRUE or FALSE? · 6 questions
• Activity 4: Logic gates quiz · 8 questions