Question

How many inputs of a three input xor gate must be high in order for the output of the logic gate to go high

Answer 1

Answer:

On a two gate XOR the output is high when the inputs are different. If the inputs are the same the output is low. You can find a XOR gate that have more than two inputs, but they are not actually a 3 input XOR. They XOR input A and B and the result of them "R" is then XOR with input C.

Answer 2

If any 1 or all 3 inputs of an xor gate are high then the output will be high.

Explanation:

• The xor representation is given by Boolean expression of:  Q = ABC + ABC + ABC + ABC
• The symbol used to denote an Exclusive-OR odd function is slightly different to that for the standard Inclusive-OR Gate.
• The logic or Boolean expression given for a logic OR gate is that of logical addition which is denoted by a standard plus sign.
• The symbol used to describe the Boolean expression for an Exclusive-OR function is a plus sign, ( + ) within a circle ( Ο ).
• This exclusive-OR symbol also represents the mathematical “direct sum of sub-objects” expression, with the resulting symbol for an Exclusive-OR function being given as: ( ⊕ ).