Digital Logic Circuits: Unit II: Combinational Circuits

Parallel Subtractor

Block diagram, Working Principle | Combinational Circuits

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• The subtraction of binary numbers can be done most conveniently by means of complements. Remember Cout3’ that the subtraction A-B can be done by taking the 2's complement of B and adding it to A.

Parallel Subtractor

• The subtraction of binary numbers can be done most conveniently by means of complements. Remember Cout3’ that the subtraction A-B can be done by taking the 2's complement of B and adding it to A. The 2's complement can be obtained by taking the l's complement and adding one to the least significant pair of bits. The l's complement can be implemented with inverters and a one can be added to the sum through the input carry, as shown in the Fig. 3.14.1.


Review Question

1. Draw and explain 4-bit parallel subtractor.

 

Digital Logic Circuits: Unit II: Combinational Circuits : Tag: : Block diagram, Working Principle | Combinational Circuits - Parallel Subtractor

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EE3302 3rd Semester EEE Dept | 2021 Regulation | 3rd Semester EEE Dept 2021 Regulation