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Implement a 4 bit ripple carry adder in structural verilog; simulate and show all details along
with results.
Solution
Answer:
module 4bit_ripple_adder(
output [3:0] Total,
output Away,
input [3:0] P,Q,
input Inside
);
wire s1,s2,s3;
full_adder CompleteAdder1(Total[0],s1,P[0],Q[0],Inside),
CompleteAdder2(Total[1],s2,P[1],Q[1],s1),
CompleteAdder3(Total[2],s3,P[2],Q[2],s2),
CompleteAdder4(Total[3],Away,P[3],Q[3],s3);
endmodule
module test_4bit_ripple_adder;
reg [3:0] P;
reg [3:0] Q;
reg Inside;
wire [3:0] Total;
wire Away;
4bit_ripple_adder undersimulate(
.Total(Total),
.Away(Away),
.P(P),
.Q(Q),
.Inside(Inside)
);
initial begin
P = 0;
Q = 0;
Inside = 0;
P=4'b0001;Q=4'b0000;Inside=1'b0;
#10 P=4'b1010;Q=4'b0011;Inside=1'b0;
#10 P=4'b1101;Q=4'b1010;Inside=1'b1;
end
initial begin
$monitor("time=",$time,, "P=%p Q=%q Inside=%q : Total=%q
Away=%q",P,Q,Inside,Total,Away);
end
endmodule

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Implement a 4 bit ripple carry adder in structural verilog- simulate a (1).docx

  • 1. Implement a 4 bit ripple carry adder in structural verilog; simulate and show all details along with results. Solution Answer: module 4bit_ripple_adder( output [3:0] Total, output Away, input [3:0] P,Q, input Inside ); wire s1,s2,s3; full_adder CompleteAdder1(Total[0],s1,P[0],Q[0],Inside), CompleteAdder2(Total[1],s2,P[1],Q[1],s1), CompleteAdder3(Total[2],s3,P[2],Q[2],s2), CompleteAdder4(Total[3],Away,P[3],Q[3],s3); endmodule module test_4bit_ripple_adder; reg [3:0] P; reg [3:0] Q; reg Inside; wire [3:0] Total; wire Away; 4bit_ripple_adder undersimulate( .Total(Total), .Away(Away), .P(P), .Q(Q), .Inside(Inside)
  • 2. ); initial begin P = 0; Q = 0; Inside = 0; P=4'b0001;Q=4'b0000;Inside=1'b0; #10 P=4'b1010;Q=4'b0011;Inside=1'b0; #10 P=4'b1101;Q=4'b1010;Inside=1'b1; end initial begin $monitor("time=",$time,, "P=%p Q=%q Inside=%q : Total=%q Away=%q",P,Q,Inside,Total,Away); end endmodule