Design of 4-Bit Ripple Carry Adder Using Full adder

Design of 4-Bit Ripple Carry Adder Using Full adder:

 

module ripple_4adder(

    input [3:0] a,

    input [3:0] b,

    input cin,

    output [3:0] sum,

    output carry );

    wire [2:0]c;

fulladder FA1(a[0],b[0],cin,sum[0],c[0]);

fulladder FA2(a[1],b[1],c[0],sum[1],c[1]);

fulladder FA3(a[2],b[2],c[1],sum[2],c[2]);

fulladder FA4(a[3],b[3],c[2],sum[3],carry);

endmodule

  

Hint: For Module fulladder refer previous posts