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  4. The logic behind NOR gate is that which gives:

Q. The logic behind NOR gate is that which gives:

 1749  201 Bihar CECEBihar CECE 2002Semiconductor Electronics: Materials Devices and Simple Circuits Report Error

Solution:

NOR gate is an OR gate followed by a NOT gate.
The NOR gate can be said to be a universal gate since, its repititive combinations can be used to accomplish any of the basic operations and can thus, produce an inverter, an OR gate, or an AND gate. Its output is high only when neither A nor B is high. That is, it is normally high but any kind of non-zero input will take it low.
image
OR gate followed by a NOT gate is shown i.e., a NOR gate.