## All about digital GATES

Truth table:
A Y
-----
0 = 0
1 = 1 Input signal is just buffered,
e.g. to drive more current or several other gates.

Truth table:
A Y
-----
0 = 1
1 = 0 Input signal inverted (negated)

Truth table:
A B Y
-------
0 0 = 0
0 1 = 0
1 0 = 0
1 1 = 1 Both inputs need to be HIGH to give HIGH output.

Truth table:
A B Y
-------
0 0 = 1
0 1 = 1
1 0 = 1
1 1 = 0 Both inputs need to be HIGH to give LOW output.

Truth table:
A B Y
-------
0 0 = 0
0 1 = 1
1 0 = 1
1 1 = 1 Both inputs need to be LOW to give LOW output,
rsp. at least 1 input must be HIGH to give HIGH output.

Truth table:
A B Y
-------
0 0 = 1
0 1 = 0
1 0 = 0
1 1 = 0 Both inputs need to be LOW to give HIGH output.

Truth table:
A B Y
-------
0 0 = 0
0 1 = 1
1 0 = 1
1 1 = 0 Both inputs need to be EQUAL to give LOW output.

Truth table:
A B Y
-------
0 0 = 1
0 1 = 0
1 0 = 0
1 1 = 1 Both inputs need to be EQUAL to give HIGH output.

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