1985 · 65 citations · 2 references
EngineeringComputer EngineeringComputer ScienceComputer ArchitectureMicroelectronicsVlsi DesignCmos Circuit DesignIntegrated Circuit DesignPhysical DesignRoutingRouting ArchitectureVery-large-scale Integration LayoutAdder DesignArithmetic Unit DesignCarry Chain ArchitectureCarry Chain DesignCarry-lookahead LogicData Path DesignVery-large-scale Integration (Vlsi) DesignVlsi Implementation
An efficient scheme for carry propagation in an ALU implemented in n-MOS technology is presented. An algorithm that determines the optimum division of the carry chain of a parallel adder for various data path sizes is developed. This yields an implementation of a fast ALU which due to its regular structure occupies a modest amount of silicon. The speed of the implementation described is comparable to the carry look-ahead scheme. Our method is based on the optimization of the carry path implemented in n-MOS technology but the results can be applied to other technologies.
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A comparison of ALU structures for VLSI technology
Daniel E. Atkins · 1983 · 14 citations