Interconnected Gates
The diagram above shows that the output of an AND gate can be the input for a NOT gate. The circuit above can also be represented with gate symbols as below.
Interconnected Gates with Symbols
A 'NAND gate' can be constructed from an AND gate followed by a NOT gate as indicated below.
Constructed NAND Gate
A NAND gate can be represented by the single symbol in the circuit below.
NAND Gate Circuit
A lone NAND gate is pictured below.
NAND Gate
The truth table for the NAND gate is shown below.
NAND gate truth table
A B C
0 0 1
0 1 1
1 0 1
1 1 0