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The document discusses binary parallel adders. It explains that a half adder adds two binary digits and produces a sum and carry out, while a full adder accepts two inputs and a carry in and produces a sum and carry out. A parallel adder connects two or more full adders to add binary numbers in parallel, producing a sum and carry output. Specifically, it presents 4-bit and 8-bit parallel adders, showing their logic diagrams, how carry outputs are connected to carry inputs between full adders, and providing an example truth table.

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? DLD PRESENTATION by shams(178) Nasrallah(106) saleem(132) younas(146) Kawar(151) 1
BINARY PARALLEL ADDER ? Binary Addition ? Half adder ? Full adder ? Parallel adder ? 4 ¨C bit parallel adder ? 8 ¨C bit parallel adder 2
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HALF ADDER ? A half adder is used to add two binary digits together, A and B. It produces S, the sum of A and B, and the corresponding carry out Co. ? Although by itself, a half adder is not extremely useful, it can be used as a building block for larger adding circuits (FA). ? One possible implementation is using two AND gates, two inverters, and an OR gate instead of a XOR gate . 4
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FULL ADDER ? A full adder accepts two inputs and an output carry and generates a sum output and as an output carry. ? The basic difference between a half adder and a full adder is that the full adder accepts a input carry 7
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PARALLEL ADDER two or more full adders Are connected to form parallel binary adder A binary parallel adder is a digital function that produces the arithmetic sum of two binary numbers in parallel. A circuit, consisting of n full adders, that will add n-bit binary numbers.? The output consists of n sum bits and a carry bit.? COUT of one full adder is connected to CIN of the next full adder. 10
Parallel Adder Diagrams 11
4 ¨C BIT PARALLEL ADDER ? A group of four bits is called a nibble. ? A basic four bit parallel adder is implemented with four full adders. 12
LOGICAL DIAGRAM 13
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TRUTH TABLE Cn-1 An Bn cn ¡Æn 0 0 0 0 0 0 0 1 0 1 0 1 0 0 1 0 1 1 1 0 1 0 0 0 1 1 0 1 1 0 1 1 0 1 0 1 1 1 1 1 15
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Dld presentation

  • 2. BINARY PARALLEL ADDER ? Binary Addition ? Half adder ? Full adder ? Parallel adder ? 4 ¨C bit parallel adder ? 8 ¨C bit parallel adder 2
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  • 4. HALF ADDER ? A half adder is used to add two binary digits together, A and B. It produces S, the sum of A and B, and the corresponding carry out Co. ? Although by itself, a half adder is not extremely useful, it can be used as a building block for larger adding circuits (FA). ? One possible implementation is using two AND gates, two inverters, and an OR gate instead of a XOR gate . 4
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  • 7. FULL ADDER ? A full adder accepts two inputs and an output carry and generates a sum output and as an output carry. ? The basic difference between a half adder and a full adder is that the full adder accepts a input carry 7
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  • 10. PARALLEL ADDER two or more full adders Are connected to form parallel binary adder A binary parallel adder is a digital function that produces the arithmetic sum of two binary numbers in parallel. A circuit, consisting of n full adders, that will add n-bit binary numbers.? The output consists of n sum bits and a carry bit.? COUT of one full adder is connected to CIN of the next full adder. 10
  • 12. 4 ¨C BIT PARALLEL ADDER ? A group of four bits is called a nibble. ? A basic four bit parallel adder is implemented with four full adders. 12
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  • 15. TRUTH TABLE Cn-1 An Bn cn ¡Æn 0 0 0 0 0 0 0 1 0 1 0 1 0 0 1 0 1 1 1 0 1 0 0 0 1 1 0 1 1 0 1 1 0 1 0 1 1 1 1 1 15
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