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Chapter: Digital Electronics : Combinational Circuits

Serial Adder With Accumulator and Serial Subtractor

The full adder is used to perform bit by bit addition and D-Flip flop is used to store the carry output generated after addition.

SERIAL ADDER WITH ACCUMULATOR:

 

               The full adder is used to perform bit by bit addition and D-Flip flop is used to store the carry output generated after addition.

 

               This carry is used to carry input for the next addition. Initially the D Flip flop is cleared and addition starts with the least significant bits of both register.

 

               After each clock pulse data within the right shift registers are shifted right 1-bit and We get from next digit and carry of precious addition as new inputs for the full adder.

 




SERIAL SUBTRACTOR:

 

In this circuit, we have Input number coming bit by bit and output comes bit by bit and the final borrow at the end:

 

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Digital Electronics : Combinational Circuits : Serial Adder With Accumulator and Serial Subtractor |


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