A Critical Review on Performance and Evaluation of High Performing Approx Multipliers

In digital system designs one of the most impactful and current trend is approximate computing which demonstrates better trade-off between circuit performance in terms of power and speed. This paper provides a critical review on speed and power performance of approx multipliers. The comparative aspect from different authors shows that there approximate circuit’s shows better and improved performance metrics for target precision. Approximate multipliers are also considered suitable mainly for their error tolerance and resilience capacities which can neglect slight extent of accuracy by improving energy efficiency and performance. This type of multipliers has small values of mean error distance and thus the generated errors have insignificant magnitude. It has been shown that as compare to exact multipliers, approx multipliers can achieve equivalent processing accuracy along with considerable improvements in terms of performance and power.