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Chapter: Digital Electronics : Combinational Circuits

BCD Adder

When the sum of two digits is less than or equal to 9 then the ordinary 4-bit adder can be used

BCD ADDER:

 

§       When the sum of two digits is less than or equal to 9 then the ordinary 4-bit adder can be used

 

§       But if the sum of two digits is greater than 9 then a correction must be added “I.e adding 0110”

 

§       We need to design a circuit that is capable of doing the correct addition

 


§       The cases where the sum of two 4-bit numbers is greater than 9 are in the following table:





 

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Digital Electronics : Combinational Circuits : BCD Adder |


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