2021年5月22日至28日，IEEE电路与系统国际研讨会（IEEE International Symposium on Circuits and Systems， ISCAS）在韩国Daegu采用线上和线下结合的形式召开，poster进行5分钟口头报告，lecture进行15分钟口头报告。ISCAS会议是IEEE电路与系统分会（Circuits and Systems, 简称CAS）下规模最大的旗舰会议，同时也是CAS下电路与系统领域影响力最大的国际学术会议。 

       上海交通大学BiCASL实验室在本次会议上共发表12篇论文，分布在EDA与物理设计、模数转换器、数字信号处理、生物医疗传感电路与系统、生理信号/图像处理、低功耗电路与架构、稳压源和后摩尔定律时代新器件相关研究领域中。值得一提的是，在陈铭易老师的指导下，郝禹植同学的虚拟电阻精确校准电路相关研究被受邀发表在IEEE Transactions on Circuits and Systems II: Express Briefs特刊。同时，在本次会议中，实验室的李永福老师和赵健老师担任了SPECIAL SESSION: Beyond Moore’s Law & More than Moore的主持人。

       EDA与物理设计方面，黄家杰就他的论文“A Highly Configurable and Extensible Spiral Capacitor Design for High Density or High Precision Applications”做了口头报告。黄家杰的论文展示了一种可重构可延伸的电容结构，该结构基于对金属-氧化物-金属（MOM）型电容的容值来源与光刻的影响的分析，使用螺旋形的结构实现。经仿真验证，此电容结构相比传统叉指型电容，可提高电容密度23%或得到最低的光刻前后容值误差。

       模数转换器方面，张继良就他的论文“A Multi-Rate Hybrid DT/CT Mash ΔΣ Modulator with High Tolerance to Noise Leakage”做了口头报告。该论文展示了一种多速率的DT/CT 混合式MASH结构ΔΣ调制器。该结构与传统CT MASH 结构相比，对噪声泄露拥有更低的敏感性，有望满足宽带高精度的需求。

       秦新宇就他的论文“Discrete-Time MASH Delta-Sigma Modulator with Second-Order Digital Noise Coupling for Wideband High-Resolution Applications”做了口头报告。秦新宇的报告展示了一个应用于宽带高精度系统的离散时间多级噪声整形ΔΣ调制器，该调制器通过一种新型的噪声耦合技术极大地缓解了MASH结构调制器的噪声泄露问题。

       数字信号处理方面，晏炜宏就他的论文"A Resource-Efficient, Robust QRS Detector Using Data Compression and Time-sharing Architecture"做了口头报告。文章提出了一种高性能、资源高效的QRS检测架构。通过使用近似方法和数据压缩技术将计算复杂度降低了 0.5 倍并节省多达 31 倍的存储内存，同时引入了一个可重新配置的计算单元来实现资源高效的架构，该算法在 Xilinx Zynq-7000上得到了验证，工作频率为 40 kHz时功耗为 1.04mW。该系统在MIT-BIH数据集上的测试实现了99.76%的灵敏度、99.85%的精度和0.40%的检测错误率。

       生物医疗传感电路与系统方面，马周辰就他的论文“A Low-Power Heart Rate Sensor with Adaptive Heartbeat Locked Loop” 做了口头报告。马周辰介绍了所提出的自适应心跳锁环电路。该心跳锁环在心率平稳时能够减小LED的打开时间，从而节省了LED的功耗。

       郝禹植就他的论文“An Active Electrode for Vital Signal Acquisition with Accurately-Tunable Sub-Hz High-Pass-Corner Frequency and 164-mVpp Linear-Input-Range” 做了口头报告，展示了一种基于开关电容的片上伪电阻校准方案。相比于传统伪电阻，该矫正电阻具有PVT波动下稳定性高，阻值可由片外时钟精确控制的特点。

       生理信号/图像处理方面，刘真宏就他的论文“An Energy Efficient Functional Near Infrared Spectroscopy System Employing Spatial Adaptive Sampling Technique”做了口头报告。刘真宏在报告中展示了一种采用二进制神经网络的NIRS（近红外光谱技术）空间自适应采样系统，该系统能够在保证采样精度的前提下，结合大脑活动特性，降低NIRS系统功耗。

       低功耗电路与架构方面，马策就他的论文“An Energy-efficient Level Shifter Using Time Borrowing Technique for Ultra Wide Voltage Conversion from Sub-200mv to 3.0V”作了口头报告，该论文提出了一种基于时间借用的高性能触发器嵌入式电平转换器，能够实现200mV 低电平到3V 高电平的转换，并能通过嵌入的触发器功能提高对超低电压电路中的PVT扰动的鲁棒性。

       稳压源方面，陈威富就他的论文”A 1-μA-quiescent-current Capacitor-less LDO Regulator with Adaptive Embedded Slew-Rate Enhancement Circuit”做了口头报告。陈威富的口头报告展示了一个低功耗LDO电路，该电路采用了自适应嵌入式压摆率增强电路与class-AB型误差放大器实现了快速动态响应和宽负载范围。

       后摩尔定律时代新器件方面，蔡桥就他的论文“An Ultra-low-Voltage Energy-efficient Dynamic Fully-Regenerative Latch-based Level-Shifter Circuit with Tunnel-FET & FinFET devices” 做了口头报告。该论文展示了一个基于动态锁存器和混合TFET与FinFET器件的level shifter电路设计。该电路结构可实现50mV到1.2V的电压转换，并在功耗延时及性能方面实现了明显的提升，显示了新器件TFET在低压电路设计中的优势。

       陈开泉就他的论文“FreePDK15TFET: An Open-source Process Design Kit for 15nm CMOS and TFET devices” 做了口头报告。陈开泉的口头报告展示了一个基于 FreePDK15的开源 15nm TFET PDK (15nmTFETPDK)。该PDK额外支持开源 TFET 模型及其相关的 OA 格式的 Cadence Virtuoso pcell 和 Mentor Calibre 物理验证文件。电路设计者可以在 Cadence Virtuoso 平台上设计电路，并通过 Calibre 平台验证绘制的版图和电路的一致性。

       刘雅心就她的论文“Omni-Directional Transistors: Enabling Tensile-Force-Resilient Operation for Flexible Circuits and Systems”进行了口头报告。刘雅心展示了一种任意二维方向力作用下性能不敏感的全向薄膜晶体管，通过调节全向晶体管的工作模式使得力不敏感轴旋转，实现了良好的抗拉伸能力，并仿真验证了其可靠性。

论文目录如下：

1. J. Huang et al., "A Highly Configurable and Extensible Spiral Capacitor Design for High Density or High Precision Applications," 2021 IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401506

2. J. Zhang et al., "A Multi-Rate Hybrid DT/CT Mash ΔΣ Modulator with High Tolerance to Noise Leakage," IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401444

3. X. Qin, J. Zhang, L. Qi, S. -W. Sin, R. P. Martins and G. Wang, "Discrete-Time MASH Delta-Sigma Modulator with Second-Order Digital Noise Coupling for Wideband High-Resolution Applications," 2021 IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5.  https://ieeexplore.ieee.org/document/9401651

4. W. Yan et al., "A Resource-Efficient, Robust QRS Detector Using Data Compression and Time-sharing Architecture," 2021 IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401523

5. Z. Ma et al., "A Low-Power Heart Rate Sensor with Adaptive Heartbeat Locked Loop," IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401726

6. Y. Hao, M. Chen, W. Chen, Y. Zhao and Y. Li, "An Active Electrode for Vital Signal Acquisition With Accurately-Tunable Sub-Hz High-Pass-Corner Frequency and 164-mVₚₚ Linear-Input-Range," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 68, no. 5, pp. 1610-1614, May 2021. https://ieeexplore.ieee.org/document/9378812

7. Z. Liu et al., "An Energy Efficient Functional Near Infrared Spectroscopy System Employing Spatial Adaptive Sampling Technique," IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401431

8. C. Ma, Y. Ji, C. Qiao, T. Zhou, L. Qi and Y. Li, "An Energy-Efficient Level Shifter Using Time Borrowing Technique for Ultra Wide Voltage Conversion from Sub-200mV to 3.0V," IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401480

9. W. Chen, M. Chen, Y. Hao, L. Qi and J. Zhao, "A 1-μA-quiescent-current Capacitor-less LDO Regulator with Adaptive Embedded Slew-Rate Enhancement Circuit," IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401457

10. Q. Cai et al., "An Ultra-low-Voltage Energy-efficient Dynamic Fully-Regenerative Latch-based Level-Shifter Circuit with Tunnel-FET & FinFET devices," IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401097

11. K. Chen, C. Ma, Q. Zhang, Y. Li, J. Zhao and M. Chen, "FreePDK15TFET: An Open-source Process Design Kit for 15nm CMOS and TFET devices," IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401190

12. Y. Liu, H. Liu, S. Chen, C. Lin and J. Zhao, "Omni-Directional Transistors: Enabling Tensile-Force-Resilient Operation for Flexible Circuits and Systems," IEEE International Symposium on Circuits and Systems (ISCAS), 2021, pp. 1-5. https://ieeexplore.ieee.org/document/9401727