Combinational Logic Circuits: Adder Presentation Overview
Explore the basics of combinational logic circuits, learn about half-adders and full-adders, and understand how these circuits are used for binary addition. Dive into the classification, operation, and applications of these essential digital logic components.
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Presentation Transcript
Presentation On Combinational Logic Circuit(Adder) Prepared By .. Dr. Saurav Samanta Dept. Of Physics Bajkul Milani Mahavidyalaya
Combinational Logic Circuits Combinational Logic Circuits are memoryless digital logic circuits whose output at any instant in time depends only on the combination of its inputs. Some of the characteristics of combinational circuits are following The output of combinational circuit at any instant of time, depends only on the levels present at input terminals. The combinational circuit do not use any memory. The previous state of input does not have any effect on the present state of the circuit. A combinational circuit can have an n number of inputs and m number of outputs.
Half Adder The Half-Adder is a basic building block of adding two numbers as two inputs and produce out two outputs. The adder is used to perform OR operation of two single bit binary numbers. The augent and addent bits are two input states, and 'carry' and 'sum 'are two output states of the half adder. Block diagram Truth Table The SOP form of the sum and carry are as follows: Sum = x'y+xy' Carry = xy
Full Adder The half adder is used to add only two numbers. To overcome this problem, the full adder was developed. The full adder is used to add three 1-bit binary numbers A, B, and carry C. The full adder has three input states and two output states i.e., sum and carry. Block diagram
