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We present an approximate logarithmic multiplier with two-stage operand trimming, which prioritises area and energy consumption while retains acceptable accuracy. The multiplier trims the least significant parts of input operands in the first stage and the mantissas of the obtained operands' approximations in the second stage. We evaluated the multiplier's efficiency in terms of error, energy, and area utilisation using NanGate 45nm. The experimental results show that the proposed multiplier exhibits smaller area utilisation and energy consumption than the state-of-the-art designs and that it behaves well in image processing and image classification with convolutional neural networks.

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