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f-alpha.net » Electronics » Digital Electronics » Boolean Logic » Let's go... » Experiment 2 - The AND Gate

Experiment 2 - The AND Gate

This logic is the same logic as in the language usage: " The house is closed (Q), if the window (A) and the door (B) are closed".

  • If the window and the door are open (A = 0,B = 0), the house is open (Q = 0).
  • If the window is open (A = 0) and the door is closed (B = 1), the house is open (Q = 0).
  • If the window is closed (A = 1) und the door is open (B = 0), the house is open (Q = 0).
  • If the window and door are closed (A = 1, B = 1), the house is closed (Q = 1).

This is shown in the truth table...

A B Q
0 0 0
0 1 0
1 0 0
1 1 1

Truth Table of the AND logic.

AND symbol in circuit diagrams.

A AND circuit. (Enlarge)

With one of the four AND gates on the C-MOS IC 4081 you can build an AND logic circuit as shown in the picture.

The AND logic is not the only way to logically combine two inputs ...

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