Koggetsone adder : Fault Tolerant

   

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The Kogge-Stone adder is a parallel prefix adder. It will have a generate and the propagate signals. Area and power are compromised at the cost of fast computation. Logic depth is reduced in this module. It overcomes the disadvantages of a carry propagate delay in regular ripple carry adder.  

 

 

This operator works on the generate and propagate pairs as defined by,
(gL, pL) (gR, pR) = (gL + pL gR, pL pR)

 

An 8-bit Kogge-Stone adder : 

8 :Generate and propagate (GP) blocks

8: Black cells (BC) blocks

8: Gray cell (GC) blocks

9:Sum blocks.  

Reader can refer to any standard papers for the top module design. 

 

Verilog Code : 

 

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