Abstract:
MAC (multiplier accumulator unit ) is the hardware unit . The MAC consists of multiplier adder, and accumulator. The MAC (multiplier accumulate unit ) unit is used in digital signal processing (DSP) applications. MAC unit is operation is multiply and addition functions . MAC have two stages , first stage is performs product of the given number and the result is forward the second stage. that is addition and accumulate .it stages are executed the single round . There is lot of research operation on MAC implementation and it can be give the comparative performance .

Keywords: Multiplier Accumulator Unit(MAC), Digital Signal Processing (DSP), Algorithmic Noise Tolerant (ANT) , Replica Redundancy Block (RPR) .