Gates

Ok, let's try building several logic gates at the same time. Build a combinational circuit with two inputs, a and b.

There are 7 outputs, each with a logic gate driving it:

• out_and: a and b

• out_or: a or b

• out_xor: a xor b

• out_nand: a nand b

• out_nor: a nor b

• out_xnor: a xnor b

• out_anotb: a and-not b

solution

module top_module( 
    input a, b,
    output out_and,
    output out_or,
    output out_xor,
    output out_nand,
    output out_nor,
    output out_xnor,
    output out_anotb
);
	assign out_and = a & b;
    assign out_or = a|b;
    assign out_xor = a^b;
    assign out_nand = ~(a&b);
    assign out_nor = ~(a|b);
    assign out_xnor = ~(a^b);
    assign out_anotb = a& ~b;
endmodule