Adders ALU - PowerPoint PPT Presentation
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Adders ALU
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A 4-bit Carry. Lookahead Adder. Active Low Pi and. Gi. Same as A0 XOR B0 ... to construct a 16-bit. We use carry. lookahead adder. We use carry. lookahead adder ... – PowerPoint PPT presentation
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Title: Adders ALU
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Adders ALU
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74x283 A 4-bit Carry Lookahead Adder
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Active Low Pi and Gi
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Same as A0 XOR B0
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Logic to generate Carrys
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A3 XOR B3
Logic for Generating C3
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Cascading four 4-bit adders to construct a 16-bit
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We use carry lookahead adder
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We use carry lookahead adder
So this design is much faster than a 16-bit
ripple carry adder
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ALU
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