COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
Question
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Detailed explanation1: Half adder is a combinational logic circuit with two inputs and two outputs. The half adder circuit is designed to add two single bit binary number A and B. It is the basic building block for addition of two single bit numbers. This circuit has two outputs carry and sum.
Detailed explanation2: 4.1. A full adder circuit is central to most digital circuits that perform addition or subtraction. It is so called because it adds together two binary digits, plus a carryin digit to produce a sum and carryout digit. It therefore has three inputs and two outputs.
Detailed explanation3: A half adder just adds two bits together and gives a twobit output. A full adder adds two inputs and a carried input from another adder, and also gives a twobit output.
Detailed explanation4: The half adder determines the least significant bit of the sum as the XOR of the least significant bits of the inputs. The carry output of the half adder becomes the carry input of the full adder. The full adder computes the sum of the inputs A1 and A2 and the carry bit. Example: A=3 (11) and B=1 (01): S0=0.
Detailed explanation5: A logic circuit that can perform addition of 2bits is the HALF ADDER. It is used to add 2bits using using one EXOR gate where as carry operation can be performed using AND gate. Analysis: Let the two inputs are A and B .