Institute of Electrical & Electronic Engineers
Approximate computing has gained significant attention due to the popularity of multimedia applications. In this paper, the authors propose a novel inaccurate 4:2 counter that can effectively reduce the partial product stages of the Wallace multiplier. Compared to the normal Wallace multiplier, their proposed multiplier can reduce 10.74% of power consumption and 9.8% of delay on average, with an error rate from 0.2% to 13.76%. The accuracy of amplitude is higher than 99%. In addition, they further enhance the design with error-correction units to provide accurate results.