Sky-TCAM: Low-Power Skyrmion-Based Ternary Content Addressable Memory
Sky-TCAM: Low-Power Skyrmion-Based Ternary Content Addressable Memory
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DOI：
10.1109/ted.2023.3274506
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发表时间：
2023-07
影响因子：
3.1
通讯作者：
Ruifu Zhang;Student Member Ieee Chunli Tang;Xiaozhen Sun Mengyuan;Member Ieee Peng Li;Xiaomin Cheng;Fellow Ieee Sharon Hu;Wencan Jin;Mengyuan Li
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作者：
Ruifu Zhang;Student Member Ieee Chunli Tang;Xiaozhen Sun Mengyuan;Member Ieee Peng Li;Xiaomin Cheng;Fellow Ieee Sharon Hu;Wencan Jin;Mengyuan Li
低成本的内容可寻址存储器（CAM）对于许多需要高速搜索的应用（如网络路由器和机器学习）来说是非常理想的。我们提出了一种低功耗，紧凑，快速的磁性skyrmion为基础的三元CAM（Sky-TCAM）单元设计。每个单元包括具有五个晶体管和两个磁性隧道结（MTJ）的5 T2 R结构。搜索电流极性与存储位一起可以实现XOR逻辑。当失配发生时，skyrmion出现在一个MTJ下方，导致匹配线（ML）放电。虽然搜索能量延迟乘积（EDP）与非易失性（NV）三元CAM（TCAM）相当，但Sky-TCAM显示出我们比较的所有TCAM中最低的EDP，为${8.74} \times {10}^{-{25}}\，\，\text {J}\，\，\cdot \，\，\text {s}$。我们的研究表明，Sky-TCAM是有前途的低功耗和低延迟的计算应用程序。
Low-cost content-addressable memories (CAMs) are highly desirable for many applications where high-speed search is needed such as network routers and machine learning. We propose a low-power, compact, fast magnetic skyrmion-based ternary CAM (Sky-TCAM) cell design. Each cell comprises a 5T2R structure with five transistors and two magnetic tunnel junctions (MTJs). The search current polarity together with the stored bit can realize the XOR logic. When a mismatch happens, the skyrmion appears beneath one MTJ, leading to the discharge of the matchline (ML). While the search energy-delay-product (EDP) is comparable with that of non-volatile (NV) ternary CAMs (TCAMs), Sky-TCAM shows the lowest EDP of ${8.74} \times {10}^{-{25}}\,\,\text {J}\,\,\cdot \,\,\text {s}$ among all TCAMs we compare. Our research shows that Sky-TCAM is promising for building low-power and low-latency computation applications.