How NOT gate function can be obtained from NOR gate?
There are two simple ways to do this. One way to get the NOT
function from a NOR gate is to connect all of the NOR gate's inputs
together, so that the same digital signal is sent to all of its
inputs. However, this is not the best way to do it, especially if
you are dealing with actual circuitry. A much better way to get a
NOT function is to connect all of the NOR gate's inputs except one
to a fixed low logic level (meaning off or 0, depending on how you
like to think about it), and passing the digital signal into the
remaining input. These two methods will both allow you to obtain a
NOT gate from a NOR gate.