12
12 NOR gates are required to implement full adder
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ab+bc
By using 5 NOR gates, we can implements half-subtractor. The inputs for 1st NOR gate are A and B, for 2nd NOR gate inputs are the output of 1st NOR gate and A input, for 3rd NOR gate inputs are the output of 1st NOR gate and B input, for 4th NOR gate the inputs are gates 2 and 3, and for last gate input is the output of the 4th gate.
Seven gates, they are: not, and, or, nor, nand, xor, xnor.
And, or, xor, xnor, nand, nor, not
2
Nand, nor, and, or, xor, nxor, not, true.
There are 2 types of universal gates in physics: the NAND gate (combinations of NAND gates can produce any logic function) and the NOR gate (combinations of NOR gates can also produce any logic function). These gates are considered universal because they can be used to implement any logical function.
Nand and nor gates are called universal gates .they called so as since any logic function can be done with nand and nor gates
and gates or gates nor gates nand gates are the electronics logic gates.