The 4-2 compressor has been widely employed in the design of multipliers. The considerable impact of 4-2 compressors on the efficiency of multipliers has created significant research interests in design of new compressor structures. In the vast range of error resilient applications, multiplication plays an important role in performing computation. Imprecise (approximate) realization of multiplication results in considerable area, power and delay efficiency at the cost of negligible computational errors. In this paper, an imprecise 4-2 compressor is presented. Spintronic devices as promising alternative technologies for silicon-based FET are considered for implementation of the proposed design. All designs are simulated exhaustively at the circuit level and application level. The conducted simulations indicate the superiority of the proposed design compared with the related state-of-the-art in all aspects. The proposed design has more than two and three times lower power and power delay product, respectively, compared to the best previous design.

中文翻译：

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用于节能乘法器的基于自旋的不精确 4-2 压缩机

4-2压缩器已广泛用于乘法器的设计。4-2 压缩机对乘法器效率的巨大影响已在设计新的压缩机结构方面产生了重要的研究兴趣。在广泛的容错应用中，乘法在执行计算中起着重要作用。乘法的不精确（近似）实现会导致相当大的面积、功率和延迟效率，而代价是计算误差可以忽略不计。在本文中，提出了一种不精确的 4-2 压缩机。自旋电子器件作为硅基 FET 的有前途的替代技术被考虑用于实施所提出的设计。所有设计都在电路级和应用级进行了详尽的模拟。所进行的模拟表明，与相关的最新技术相比，所提出的设计在各个方面都具有优越性。与之前的最佳设计相比，所提出的设计的功率和功率延迟积分别降低了两倍和三倍以上。