Tagged memory technology serves as an effective storage mechanism for secure processors using tags. However, storing tags either compromises compatibility with generalpurpose memory systems or introduces significant overhead in terms of memory space and access time. To address these issues, we propose a method for storing and retrieving tags by applying a memory-side tag cache to shadow memory. A module that integrates both a tag cache and a tag management unit is placed atop the memory with shadow space. This enhancement significantly reduces the number of memory accesses required by the shadow memory structure. The proposed storage structure and method are validated through hardware-level simulation on an FPGA platform. The results show that the proposed design achieves a $\mathbf{9 2. 7 \%}$ increase in throughput and a $\mathbf{4 1. 1 \%}$ reduction in latency.

This paper presents a readout circuit based on AGC-PI structure for resonant pressure microsensors. A Gm-C based PI controller, which consists of an operational trans-conductance amplifier and a resistor-capacitor network, realizes the proportional-integral control and error amplification. An MOS resistor divider is used as VGA for its simple structure and low flicker noise. The readout circuit is fabricated in a $0.18\mu\mathrm{m}$ BCD process. Experiments show that the system can operate at temperatures from $-55\sim 85^{\mathrm{o}}\mathrm{C}$ and supply voltages from $4\sim 5.5\mathrm{V}$ with a bias instability of 0. $024\text{Hz}$ and a phase noise of -100dBc/Hz. The current consumption is 2. $7\text{mA}$ at $5\mathrm{V}$ supply voltage.

Collecting training samples for ultrasound-based gesture recognition systems incurs a high cost. This paper proposes a method enabling simultaneous sample collection using two devices to address this issue. This method takes advantage of Direct Sequence Spread Spectrum (DSSS) technology, in which interference from similar devices can be suppressed through correlation processing. This approach generates two distinct genuine gesture samples from a single action, improving sample collection efficiency and diversity. A prototype system was constructed, and experiments were conducted to validate the proposed method. The results demonstrate that the model trained on samples collected using this method, where 400 actions have been done, reached an accuracy of 96.7%. In contrast, if the traditional method, the single system acquisition method, is used, the same number of actions can only get half of the samples, and the accuracy of the trained model is 0.9% lower.

阐述基于OBE理念的微电子课程教学设计,包括优化课程内容、更新教学手段、完善考核方式,从而明确目标的定义,帮助学生获得知识成果.

阐述集成电路是实现可穿戴式医疗仪器重要部件的关键技术.对数域电路由于其功耗低、动态范围大,可以用于可穿戴式医疗仪器中,处理低频生理信号.

Gesture interaction based on ultrasonic radar is an attractive solution for wearable devices. However, interdevice interference will be a realistic problem, when multiple adjacent devices that use this kind of technology are working simultaneously. In this letter, a direct sequence spread spectrum (DSSS)-based gesture recognition system that is resilient to interdevice interference is proposed. Based on the idea of code division multiplexing, the interference of other transmitters can be suppressed through correlation processing. The range-Doppler map (RDM) is generated by fast Fourier transform on the correlation function, and then features are extracted from the RDM sequence. A random forest classification is employed to complete the gesture classification. A complete prototype DSSS gesture recognition system has been built, which consists of 40-kHz ultrasonic frontends, an field-programmable gate array (FPGA) development board, and a personal computer. It is demonstrated that the system can achieve an average accuracy up to 92% for four defined gestures while the accuracy with an interference transmitter is lowered to 88%, which is 16% higher than that of the classic scheme that does not use the DSSS technique.

Integrated circuit manufacturing is an important link in the integrated circuit industry chain.The experimental setting of integrated circuit technology course has always been the key and difficult point,which directly affects students'understanding and mastery of theoretical courses.This paper points out the problems existing in the current integrated circuit technology curriculum,puts forward ideas for improvement basing on CDIO,introduces the reform results,and provides a valuable case for the reform of integrated circuit technology curriculum in related majors.

阐述集成电路工艺课程的教学内容,集成电路工艺课程教学对于其他集成电路类课程的作用,包括单晶硅制备流程、光刻工艺的步骤、扩散工艺流程.

为了解决多套相邻智能雷达设备同时使用时的相互干扰问题,提出了直接序列扩频体制雷达的方案,利用相关处理分离同频发射机的回波,提出了由相关函数生成距离-多普勒图像的信号处理方法.建立了直接序列扩频超声雷达手势识别系统的收发信号和收发机的模拟模型,其中提出的滤波器收发器模型仿真了有限带宽效应,发射波回溯的手势回波生成算法支持各种复杂调制方式的仿真.模拟实验表明采用所提信号处理方法的直接序列扩频雷达能够实现不同发射器信号的分离,并分别得到正确的手势距离-多普勒图像,达到15％以内的测量误差和约4.03 cm的分辨率.

为应对能量侧信道攻击对未加攻击防护的加密算法的安全性造成的巨大威胁,满足安全加密的需要,以AES加密算法为研究对象,通过介绍AES算法结构及其四种基本加密运算,设计一套改进的软件实现方案,将算法中非线性运算的字节替代步骤拆分为基于有限域的S盒求逆运算和仿射变换,结合抵抗能量侧信道攻击的布尔掩码对策,使用嵌入式C语言,在一款基于RISC-V架构的处理器上完成了全掩码AES算法的软件实现.实验结果表明该方案具有理论上的正确性与现实中的可行性.

针对安全处理器中特权模式和物理内存保护这两大特性,以一款32位RISC-V安全处理器为研究对象,利用C语言和汇编语言程序构造了各种模式切换和越权访问的场景,提出了一套RISC-V特权模式和物理内存保护功能的测试方案,通过异常处理程序对处理器状态、异常信息进行观测,结果表明了该方案检验处理器安全特性的有效性.

为提高可穿戴式医疗芯片的集成度、降低芯片整体功耗和工艺成本,提出了一种多信号可配置的低功耗模拟前端电路.该电路其主要采用了C类反相器和全互补耗尽区MOS电容技术,设计了集成了带有可配置高通滤波功能的仪表放大器、低功耗可配置增益放大器和带宽可配置的低功耗低通滤波器等模块.该模拟前端电路采用SMIC 0.18 μm CMOS工艺设计,仿真结果表明:功耗为52.8μw,CMRR为76.1 dB,输入参考噪声功率谱密度为3.45 μV/sqrt(Hz).

阐述多层次集成电路类课程群体系的建立方法,提出课程群内各课程内容的优化与整合方案,实现各课程之间内容的衔接,从而实现课程的教学目标.

不停变化的网络协议标准和用户定制化网络业务需求要求交换机硬件具有更高的灵活性.在此背景下,提出了一种能够通过软件编程定义协议解析规则的以太网交换机芯片数据包解析器基本处理单元,具有高性能且高灵活性的优点,通过灵活配置硬件解析逻辑和查找表内容,定义对数据包包头内容的提取、查找、匹配、动作等解析过程,从而支持对不同种类的协议解析任务,其由2类基本结构的串联或并联组合而成,这样可以根据需要进行硬件资源裁剪.基于该可重构基本处理单元,可以构成可重构报文解析器,支持自定义协议及未知协议的解析.主要介绍了该可重构基本处理单元的结构,并介绍了基于该基本处理单元的解析器架构的实现方法.采用40 nm工艺综合后的评估结果显示,该基本单元电路最高工作时钟频率可以达到240 MHz,基于该基本处理单元结构实现的支持4层常用以太网协议解析的解析器每秒可处理2.4亿个数据包.该可重构基本处理单元所用存储资源共计87.98 Kb,设计规模约147万门.

随着物联网技术的高速发展,终端与智能设备间的数据交互变得越来越频繁.因此如何将数据准确、快速地送到处理单元是突破物联网技术发展瓶颈的关键.在FPGA中整合多种高速接口,对不同应用开发提供灵活的设计方案.以Xilinx公司的Nexys4开发板为基带处理单元,实现了一种多路数据采集并可将数据上传到上位机的嵌入式系统.

在培养具有创新精神的应用型人才目标指引下,探究性实验教学在高等教育教学中开始崭露头角.以集成电路设计专业的基本实验——全定制四位减法器电路设计为例,详细说明了传统验证性实验的具体实施形式、优势及现阶段存在的不足.在此基础上,研究了全定制四位减法器电路设计的探究性实验开展形式,分析了探究性实验形式的利弊,探讨了探究性实验与验证性实验相结合的可行性及具体的改革方案,以期更好地发挥实验教学在集成电路专业创新型、应用型人才培养中的重要作用.

基于FinFET栅电容结构微观物理特性原理,通过能带结构关系推导了考虑量子效应的栅电容物理模型公式,使用TCAD搭建了FinFET器件结构,通过MATLAB仿真出栅电容随栅电压变化的特性曲线,与理想状态对比得到在反型状态量子效应会使栅电容增大的结论,量子电容成为影响栅电容大小的主导因素,同时分析了不同状态下决定栅电容的因素,仿真了不同拟合参数对特性曲线的影响,为改善晶体管栅电容线性度的研究提供理论依据,提出的栅电容模型对基于FinFET结构的电路设计研究具有了现实意义.

针对亚阈区导电问题,基于金属氧化物半导体场效应晶体管(MOSFET)器件结构,由半导体表面空间电荷区的不同物理状态出发,分析了能带及载流子浓度随偏置电压的变化情况,推导了亚阈区表面弱反型的条件及亚阈区导电电流模型,得到了定性描绘MOSFET亚阈区导电特性的曲线,结果表明亚阈状态的MOSFET在低电压、低功耗尤其在逻辑开关和存储器等大规模集成电路应用中十分适用.

在集成电路专业的教学中,实验教学是培养学生工程实践能力和开拓创新思维的重要方式,是普通高等院校实现面向应用型人才培养目标的关键.基于集成电路专业的基础实验“全定制四位减法器设计”,介绍了集成电路专业实验教学的现状,分析了现阶段实验教学中存在的问题,进而深入探讨如何在实验内容、实验手段等方面开展分层次递进式实验教学形式,推进实验教学在发挥学生主观能动性、提升学生分析和解决问题能力等方面的重要作用,更好地服务于应用型人才培养目标.

为适应FMCW雷达技术在研究深度及相关硬件水平上的新发展,以FMCW雷达测距原理为基础,设计了用于FMCW雷达系统的一款中频处理电路,包括调制信号的产生、中频电路参数的计算及电路实现.为方便验证中频电路性能,设计实现了一种基于FPGA的信号采集方案及信号处理办法,并放置静态目标进行验证.实验结果表明,测试系统能够测量10m以内的目标距离,测距平均误差为±0.1m.该中频电路设计方案简洁便利、易于实现、成本较低且性能良好,为FMCW雷达民用化应用提供了一种解决方案.