16 - EE200 DIGITAL LOGIC CIRCUIT DESIGN Class Notes CLASS...

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EE200(class 7-3) Prof. M.M. Dawoud 67 EE200 DIGITAL LOGIC CIRCUIT DESIGN Class Notes CLASS 7-3 The material covered in this class will be as follows: Half adder. Full adder. 4-bit binary adder. 4-bit binary adder/subtractor. Carry propagation and the look ahead carry circuit. Half Adder Design a logic circuit to add two bits and produce a sum bit and a carry bit. Two inputs and two outputs are needed. Let us call the inputs x and y, and the outputs S and C. x y' x' y x y S C SOP Implementation x y x' y' x y S C POS Implementation x' y' x y S C S=(C+x'y')' x' y' x y S S=(x+y)(x'+y'); C=(x'+y')' C x y S C 0 0 0 0 0 1 1 0 1 0 1 0 1 1 0 1 )' ' ' ( )' ' ' ( ) ' ' )( ( )' ' ' ( ' ' y x C S y x xy C y x y x xy y x xy y x y x S + = + = = + + = + = + = =
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EE200(class 7-3) Prof. M.M. Dawoud 68 Full-Adder Design a logic circuit that adds two bits and a carry in bit and produce a sum bit and a carry out bit. Three inputs and two outputs are needed. Let us call the inputs x y and z, and the
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This note was uploaded on 05/21/2010 for the course EE EE200 taught by Professor Prof.ahmed during the Spring '09 term at King Fahd University of Petroleum & Minerals.

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16 - EE200 DIGITAL LOGIC CIRCUIT DESIGN Class Notes CLASS...

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