Area-efficient and highly accurate antilogarithmic converters with multiple regions of constant compensation schemes

In this paper, area-efficient and highly-accurate antilogarithmic converters are proposed. By adopting efficient constant compensation schemes, the proposed antilogarithmic converters could achieve area-efficient with reduced percent errors and reduced delay. Percent errors of the proposed converters could achieve 1.83%, 1.34% and 0.61% for 11-region, 14-region and 28-region constant compensation antilogarithmic conversion, respectively. The complexity of the schemes is very simple since the converters are consisting of only adders/subtractors without shifters compared with previously proposed methods, leading to easy VLSI circuit implementations. It can be used for digital signal processing and digital camera applications; that can simplify greatly the computation efforts.