AdvancedA-002-010-003
What is a NOR gate?
B
Answer
Circuit design and power supplies
Type
A
A circuit that produces a logic "1" at its output if some but not all of its inputs are logic "1"
B
A circuit that produces a logic "0" at its output if any or all inputs are logic "1"
C
A circuit that produces a logic "1" at its output only if all inputs are logic "1"
D
A circuit that produces a logic "0" at its output only if all inputs are logic "0"
Answer Notes
A NOR (NOT-OR) gate is simply an OR gate with an inverted output. Since an OR gate produces a logic "1" if any input is "1", the NOR gate does the exact opposite: it produces a logic "0" if any or all inputs are "1".
Because of this inversion, a NOR gate will only output a logic "1" when all of its inputs are logic "0". If you see even a single logic "1" at the input, the output immediately becomes "0".
Understanding this relationship makes it easy to remember: it is an OR gate followed immediately by a NOT gate, flipping all standard OR outputs to their opposite states.
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What is an OR gate?
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What is a NOT gate (also known as an INVERTER)?