Adder Circuits
Adder Circuits
Adder Circuits
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<strong>Adder</strong>.PPT(10/1/2009) 5.28Multiplexer DetailsCarry Skip (4)CSKC3C–1MUXG111C3XCSK!C3X0 !C31 !C–1CSK1C3C3C3XC–1C–1We merge both AND gates:• the 3-AND gate merges into the following NAND• the 2-AND gate merges into the next adder stageCSK1C3C–1C3XC–1 C–1 !C3X now equals 1 gate delay.
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