NOT Gate

A NOT gate is a fundamental binary logic gate with one input and one output. The output is the inverse, a.k.a. complement, of the input.

The following truth table gives the specification for a NOT gate with output X:

A	X
0	1
1	0

The schematic form of the NOT gate is:

Below is a Verilog structural model for the NOT gate. In the code, the first argument to not is the gate output, the other argument is the input.

	    
module not_gate(X, A);
   output X;
   input  A;

   not(X, A);
endmodule
	    
	  

References

Mano, M. Morris, and Kime, Charles R. Logic and Computer Design Fundamentals. 2nd Edition. Prentice Hall, 2000.
Kleitz, W. Digital Microprocessor Fundamentals. 3rd Edition. Prentice Hall, 2000.