full adder | Student Projects https://studentprojects.in Microcontroller projects, Circuit Diagrams, Project Ideas Sat, 09 Jun 2012 08:55:15 +0000 en-US hourly 1 https://wordpress.org/?v=6.1.7 Verilog HDL Program for FULL ADDER https://studentprojects.in/electronics/verilog-hdl/verilog-hdl-program-for-full-adder/ https://studentprojects.in/electronics/verilog-hdl/verilog-hdl-program-for-full-adder/#comments Thu, 31 May 2012 14:04:24 +0000 http://studentprojects.in/?p=3002 A full adder adds binary numbers and accounts for values carried in as well as out. A one-bit full adder adds three one-bit numbers, often written as A, B, and Cin; A and B are the operands, and Cin is a bit carried in from the next less significant stage. The full-adder is usually a

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]]> A full adder adds binary numbers and accounts for values carried in as well as out. A one-bit full adder adds three one-bit numbers, often written as A, B, and Cin; A and B are the operands, and Cin is a bit carried in from the next less significant stage. The full-adder is usually a component in a cascade of adders, which add 8, 16, 32, etc. binary numbers. The circuit produces a two-bit output sum typically represented by the signals Cout and S, where sum = 2XCout + S.
Full Adder
Full Adder

module fa(s,co,a,b,ci);
    output s,co;
    input a,b,ci;
    xor1 u1(s,a,b,ci);
    and1 u2(n1,a,b);
    and1 u3(n2,b,ci);
    and1 u4(n3,a,ci);
    or1 u5(co,n1,n2,n3);
endmodule
Simulated waveform for Full Adder
Simulated waveform for Full Adder

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