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IEEE Journal on Exploratory Solid-State Computational Devices and Circuits publication information 探索性固态计算器件和电路IEEE杂志出版信息
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2022-06-01 DOI: 10.1109/JXCDC.2022.3143391
Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.
列出本刊的编辑委员会、理事会、现任工作人员、委员会成员和/或社团编辑。
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引用次数: 0
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits publication information 探索性固态计算器件和电路IEEE杂志出版信息
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2022-06-01 DOI: 10.1109/JXCDC.2022.3143399
Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.
列出本刊的编辑委员会、理事会、现任工作人员、委员会成员和/或社团编辑。
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引用次数: 0
Modeling and Design for Magnetoelectric Ternary Content Addressable Memory (TCAM) 磁电三元内容可寻址存储器(TCAM)的建模与设计
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2022-06-01 DOI: 10.1109/JXCDC.2022.3181925
Siri Narla, Piyush Kumar, Ann Franchesca Laguna, D. Reis, X. S. Hu, M. Niemier, A. Naeemi
This article proposes a novel magnetoelectric (ME) effect-based ternary content addressable memory (TCAM). The potential array-level write and search performances of the proposed ME-TCAM are studied using experimentally calibrated compact physical models and SPICE simulations. The voltage-controlled operation of the ME devices eliminates the large joule heating present in the current-controlled magnetic devices and their low-voltage write operation makes them more energy-efficient compared to static random access memory-based TCAMs (SRAM-TCAMs). The proposed compact TCAM outperforms its SRAM counterpart with $1.35times $ and $14.4times $ improvements in search and write energy, respectively, and its nonvolatility eliminates the standby leakage. We project an error rate below $10^{-4}$ while considering various sources of variation in magnetic and CMOS devices. At the application level, using memory-augmented neural networks (MANNs), we project a $2times $ energy-delay–area-product (EDAP) improvement over an SRAM-TCAM.
提出了一种基于磁电效应的三元内容可寻址存储器。利用实验校准的紧凑物理模型和SPICE模拟研究了所提出的ME-TCAM的潜在阵列级写入和搜索性能。与基于静态随机存取存储器的TCAMs (SRAM-TCAMs)相比,ME器件的电压控制操作消除了电流控制磁性器件中存在的大焦耳发热,其低压写入操作使其更加节能。所提出的紧凑型TCAM在搜索和写入能量方面分别优于SRAM,分别提高了1.35倍和14.4倍,并且其非易失性消除了待机泄漏。我们预计错误率低于$10^{-4}$,同时考虑磁性和CMOS器件的各种变化来源。在应用层面,使用记忆增强神经网络(MANNs),我们预计比SRAM-TCAM提高2倍的能量延迟面积积(EDAP)。
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引用次数: 6
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits Information for Authors 面向作者的探索性固态计算器件和电路杂志
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2022-06-01 DOI: 10.1109/JXCDC.2022.3143393
These instructions give guidelines for preparing papers for this publication. Presents information for authors publishing in this journal.
这些说明提供了为本出版物准备论文的指导方针。为在本期刊上发表文章的作者提供信息。
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引用次数: 0
IGZO CIM: Enabling In-Memory Computations Using Multilevel Capacitorless Indium–Gallium–Zinc–Oxide-Based Embedded DRAM Technology IGZO CIM:使用基于多电平无电容铟镓锌氧化物的嵌入式DRAM技术实现内存计算
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2022-06-01 DOI: 10.1109/JXCDC.2022.3188366
Siddhartha Raman Sundara Raman;Shanshan Xie;Jaydeep P. Kulkarni
Compute-in-memory (CIM) is a promising approach for efficiently performing data-centric computing (such as neural network computations). Among the multiple semiconductor memory technologies, embedded DRAM (eDRAM), which integrates the DRAM bit cell with high-performance logic transistors, can enable efficient CIM designs. However, the silicon-based eDRAM technology suffers from poor retention time-incurring significant refresh power overhead. However, eDRAM using back-end-of-line (BEOL) integrated $C$ -axis aligned crystalline (CAAC) indium–gallium–zinc–oxide (IGZO) transistors, exhibiting extreme low leakage, is a promising memory technology with lower refresh power overhead. A long retention time in IGZO eDRAM can enable multilevel cell functionality, which can improve its efficacy in CIM applications. In this article, we explore a capacitorless IGZO eDRAM-based multilevel cell, capable of storing 1.5 bits/cell for CIM designs focused on deep neural network (DNN) inference applications. We perform a detailed design space exploration of IGZO eDRAM sensitivity to process temperature variations for read, write, and retention operations followed by architecture-level simulations comparing performance and energy for different workloads. The effectiveness of IGZO eDRAM-based CIM architecture is evaluated using a representative neural network, and the proposed approach achieves 82% Top-1 inference accuracy for the CIFAR-10 dataset, compared with 87% software accuracy with high bit cell storage density.
内存计算(CIM)是有效执行以数据为中心的计算(如神经网络计算)的一种很有前途的方法。在多种半导体存储技术中,嵌入式DRAM (eDRAM)集成了DRAM位单元和高性能逻辑晶体管,可以实现高效的CIM设计。然而,硅基eDRAM技术的缺点是保持时间较差,会导致显著的刷新功耗开销。然而,eDRAM采用后端线(BEOL)集成的$C$轴对齐晶体(CAAC)铟镓锌氧化物(IGZO)晶体管,具有极低的漏损,是一种具有较低刷新功耗的有前途的存储技术。IGZO eDRAM中较长的保留时间可以实现多级单元功能,从而提高其在CIM应用中的效率。在本文中,我们探索了一种基于无电容IGZO edram的多层单元,能够存储1.5比特/单元,用于深度神经网络(DNN)推理应用的CIM设计。我们对IGZO eDRAM对读、写和保留操作的过程温度变化的敏感性进行了详细的设计空间探索,然后进行了架构级模拟,比较了不同工作负载的性能和能量。使用代表性神经网络评估了基于IGZO edram的CIM架构的有效性,该方法对CIFAR-10数据集实现了82%的Top-1推理准确率,而在高位元存储密度下,该方法的软件准确率为87%。
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引用次数: 2
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits Information for Authors 面向作者的探索性固态计算器件和电路杂志
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2022-06-01 DOI: 10.1109/JXCDC.2022.3143401
These instructions give guidelines for preparing papers for this publication. Presents information for authors publishing in this journal.
这些说明为编写本出版物的论文提供了指导。为在本期刊上发表文章的作者提供信息。
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引用次数: 0
A FeFET-Based Hybrid Memory Accessible by Content and by Address 一种可通过内容和地址访问的基于FeFET的混合存储器
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2022-04-18 DOI: 10.1109/JXCDC.2022.3168057
Cédric Marchand;Ian O’Connor;Mayeul Cantan;Evelyn T. Breyer;Stefan Slesazeck;Thomas Mikolajick
Emerging nonvolatile memory technologies are attracting interest from the system design level to implement alternatives to conventional von-Neumann computing architectures. In particular, the hafnium oxide-based ferroelectric (FE) memory technology is fully CMOS-compatible and has already been used for logic-in-memory architectures or compact ternary content addressable memory (TCAM) cells. These enable the tight combination of different functionalities in the same circuit to reduce implementation area and energy consumption. In this article, we propose a new hybrid memory circuit that combines TCAM and normal memory capability: the Ternary Content addressable and MEMory (TC-MEM). A 1-bit TC-MEM circuit is proposed and discussed in detail, both as a concept and through its implementation in a 28-nm ferroelectric field-effect transistor (FeFET) technology. Measurement results demonstrate the circuit functionality. We also discuss how to scale it to multibit circuits, as well as its use both as a TCAM and as a normal memory allowing the implementation of reversible functions using one memory table instead of two memory tables, and in-memory-computing concepts.
新兴的非易失性存储器技术吸引了系统设计层面的兴趣,以实现传统冯·诺依曼计算架构的替代方案。特别地,基于氧化铪的铁电(FE)存储器技术是完全CMOS兼容的,并且已经用于存储器结构中的逻辑或紧凑的三元内容可寻址存储器(TCAM)单元。这些使得能够在同一电路中紧密组合不同的功能,以减少实现面积和能耗。在本文中,我们提出了一种新的混合存储电路,它结合了TCAM和正常存储能力:三元内容可寻址和memory(TC-MEM)。提出并详细讨论了一种1位TC-MEM电路,它既是一个概念,也是通过在28nm铁电场效应晶体管(FeFET)技术中的实现。测量结果证明了电路的功能。我们还讨论了如何将其扩展到多位电路,以及它作为TCAM和普通存储器的用途,允许使用一个存储表而不是两个存储表来实现可逆函数,以及内存计算概念。
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引用次数: 2
An Algorithm-Hardware Co-Design for Bayesian Neural Network Utilizing SOT-MRAM’s Inherent Stochasticity 利用SOT-MRAM固有稳健性的贝叶斯神经网络算法硬件协同设计
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2022-03-23 DOI: 10.1109/JXCDC.2022.3177588
Anni Lu;Yandong Luo;Shimeng Yu
Probabilistic machine learning plays a central role in the domains such as decision-making and autonomous control benefitting from its ability of representing and manipulating uncertainty about models and predictions. Until now, there are few hardware considerations to address the intensive computation and true random number generation for Bayesian neural network (BayesNN), whose weights are represented by probability distributions. In this article, we propose to apply the local reparameterization trick to alleviate the burden of random number generators (RNGs), which could be implemented by utilizing the inherent random noise of spin-orbit torque magnetic random access memory (SOT-MRAM). Sampling strategies are discussed to significantly reduce the number of operations and parameters of BayesNN. A device-circuit-system benchmark framework is then developed to evaluate the effects of device nonidealities such as the bias and variation of switching probability. The evaluation on the CIFAR-10 dataset suggests that BayesNN could achieve comparable accuracy as conventional deep neural network (DNN) with acceptable hardware overhead but provide much better uncertainty calibration with respect to out-of-distribution (OOD) inputs (rotated images as the example).
概率机器学习在决策和自主控制等领域发挥着核心作用,得益于其表示和操纵模型和预测不确定性的能力。到目前为止,很少有硬件考虑来解决贝叶斯神经网络(BayesNN)的密集计算和真实随机数生成,其权重由概率分布表示。在本文中,我们建议应用局部重新参数化技巧来减轻随机数发生器(RNG)的负担,这可以通过利用自旋轨道力矩磁随机存取存储器(SOT-MRAM)的固有随机噪声来实现。讨论了采样策略,以显著减少贝叶斯网络的运算次数和参数。然后开发了一个器件-电路系统基准框架来评估器件非理想性的影响,如开关概率的偏差和变化。对CIFAR-10数据集的评估表明,BayesNN可以在可接受的硬件开销下实现与传统深度神经网络(DNN)相当的精度,但相对于分布外(OOD)输入(以旋转图像为例)提供更好的不确定性校准。
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引用次数: 5
Physics-Based Models for Magneto-Electric Spin-Orbit Logic Circuits 磁电自旋轨道逻辑电路的物理模型
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2022-01-14 DOI: 10.1109/JXCDC.2022.3143130
Hai Li;Dmitri E. Nikonov;Chia-Ching Lin;Kerem Camsari;Yu-Ching Liao;Chia-Sheng Hsu;Azad Naeemi;Ian A. Young
Spintronic devices provide a promising beyond-complementary metal-oxide-semiconductor (CMOS) device option, thanks to their energy efficiency and compatibility with CMOS. To accurately capture their multiphysics dynamics, a rigorous treatment of both spin and charge and their inter-conversion is required. Here, we present physics-based device models based on $4times4$ matrices for the spin-orbit coupling (SOC) part of the magneto-electric spin-orbit (MESO) device. Also, a more rigorous physics model of ferroelectric and magnetoelectric (ME) switching of ferromagnets, based on Landau–Lifshitz–Gilbert (LLG) and Landau–Khalatnikov (LK) equations, are presented. With the combined model implemented in a SPICE circuit simulator environment, simulation results were obtained which show feasibility of the MESO implementation and the functional operation of buffers, synchronous oscillators, and majority gates.
自旋电子器件提供了一个有前途的超越互补金属氧化物半导体(CMOS)器件的选择,由于它们的能量效率和与CMOS的兼容性。为了准确地捕捉它们的多物理场动力学,需要对自旋和电荷及其相互转换进行严格的处理。在这里,我们提出了基于$4times4$矩阵的磁电自旋轨道(MESO)器件自旋轨道耦合(SOC)部分的物理器件模型。此外,基于Landau-Lifshitz-Gilbert (LLG)和Landau-Khalatnikov (LK)方程,提出了一个更严格的铁磁体铁电和磁电(ME)切换的物理模型。在SPICE电路仿真环境中实现了该组合模型,仿真结果表明了MESO实现的可行性以及缓冲器、同步振荡器和多数门的功能运行。
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引用次数: 3
Special Topic on Cryogenic Semiconductor Devices and Circuits for Computing 计算用低温半导体器件和电路专题
IF 2.4 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Pub Date : 2021-12-30 DOI: 10.1109/JXCDC.2021.3135720
Victor Zhirnov
The Decadal Plan for Semiconductors [1] has identified cryogenic computing as one of the research priorities that can help us meet the needs of future generations. Indeed, cryogenic semiconductor electronics is expected to have a rebirth due to advances in quantum computing, medical and scientific instrumentation, aviation, space exploration, and so on. Emerging materials and physics can be leveraged for new cryogenic device-inherent behavior that can have system-level benefits. Cryogenic semiconductor devices, including transistors, emerging resistive memories, and other device types as the basis, can innovate the entire computing stack from materials to systems and thus redefine how computation can be done. Looking forward, the realm of cryogenic electronics is inspired by the new and continually emerging understanding of cryogenic semiconductor physics applications.
半导体十年计划[1]已将低温计算确定为可以帮助我们满足后代需求的研究重点之一。事实上,由于量子计算、医疗和科学仪器、航空、太空探索等领域的进步,低温半导体电子学有望获得重生。新兴材料和物理学可以用于新的低温设备固有行为,可以具有系统级的好处。低温半导体器件,包括晶体管,新兴的电阻存储器和其他器件类型作为基础,可以创新从材料到系统的整个计算堆栈,从而重新定义计算可以如何完成。展望未来,低温电子领域的灵感来自于对低温半导体物理应用的新的和不断出现的理解。
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引用次数: 0
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IEEE Journal on Exploratory Solid-State Computational Devices and Circuits
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