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09 May 2023, Volume 38 Issue 3
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Abstract
Approximate computing can successfully attain lower computational costs. The computational accuracy and the circuit's size, delay, and power requirements are traded off in this method. However, the accuracy standards may vary depending on the application. In some situations, accurate results are required. In order to compute accurate or approximative results, this work proposes a low transition accuracy-configurable radix-4 adder (ACRA) that makes advantage of the power gating mechanism. To evaluate whether the MSP influences the calculation outcomes in the bipartitioned low transition, a detection-logic unit must be used to detect the effective input ranges. In an effort to narrow the discrepancy between the approximate and accurate findings, the partial sum of one adder element is altered while the ACRA operates in the approximate mode. ACRA obtained the best power-delay product/computational accuracy trade-off when compared to two state-of-the- art accuracy adjustable adders. In low transition, the input data are blocked by a data latch, the correct sign signals are corrected using a SE unit, and the effective ranges of the input data are determined using an ACRA detection-logic unit. The power consumption and delay could be decreased by up to 25% to 30% with the suggested low transition ACRA.
Keyword
Accuracy-configurable, approximate computing, image quality, radix-4 adder, detection logic, sign extension.
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