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Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors:Overview

Nano-Micro Letters 2023年第6期15卷 353-427页

作者： Li‑Yuan Zhu Lang‑Xi Ou Li‑Wen Mao Xue‑Yan Wu Yi‑Ping Liu Hong‑Liang Lu State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics and SystemsSchool of MicroelectronicsFudan UniversityShanghai 200433People’s Republic of China School of Opto‑Electronic Information and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093People’s Republic of China State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Highly sensitive gas sensors with remarkably low detection limits are attractive for diverse practical application fields including real-time environmental monitoring,exhaled breath diagnosis,and food freshness *** various chemiresistive sensing materials,noble metal-decorated semiconducting metal oxides(SMOs)have currently aroused extensive attention by virtue of the unique electronic and catalytic properties of noble *** review highlights the research progress on the designs and applications of different noble metal-decorated SMOs with diverse nanostructures(e.g.,nanoparticles,nanowires,nanorods,nanosheets,nanoflowers,and microspheres)for high-performance gas sensors with higher response,faster response/recovery speed,lower operating temperature,and ultra-low detection *** key topics include Pt,Pd,Au,other noble metals(e.g.,Ag,Ru,and Rh.),and bimetals-decorated SMOs containing ZnO,SnO_(2),WO_(3),other SMOs(e.g.,In_(2)O_(3),Fe_(2)O_(3),and CuO),and heterostructured *** addition to conventional devices,the innovative applications like photo-assisted room temperature gas sensors and mechanically flexible smart wearable devices are also ***,the relevant mechanisms for the sensing performance improvement caused by noble metal decoration,including the electronic sensitization effect and the chemical sensitization effect,have also been summarized in ***,major challenges and future perspectives towards noble metal-decorated SMOs-based chemiresistive gas sensors are proposed.

关键词： Noble metal Bimetal Semiconducting metal oxide Chemiresistive gas sensor Electronic sensitization Chemical sensitization

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Exhaustive Application-Dependent Testing for FPGA Interconnect Resources

Exhaustive Application-Dependent Testing for FPGA Interconne...

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International Conference on Solid-state and Integrated Circuit Technology

作者： Wenwei Chen Xinyu He Tongshu Ding Jian Wang Jinmei Lai State Key Laboratory of ASIC and System School of Microelectronics Fudan University Shanghai China

ISBN: (数字)9798350361834

ISBN: (纸本)9798350361841

Up to now, in the field of application-dependent testing for FPGA interconnect resources, the most widely used method is single-term function method, and the most accurate fault model is asymmetric bridging fault model. In this paper, a new fault model called Boolean bridging fault model is proposed, which is a superset of asymmetric bridging fault model. Based on single-term function method, we minimize the number of test configurations to the greatest extent possible, and theorems in set theory ensure that the result is optimal for both asymmetric bridging fault model and Boolean bridging fault model. Moreover, for special cases called feedback bridging faults, the study demonstrates that repeated sampling is a simple method that can achieve high coverage.

关键词： Integrated circuit technology Accuracy Integrated circuit interconnections Set theory Circuit faults Integrated circuit modeling Field programmable gate arrays Testing

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A 124-152 GHz > 15-dBm Psat28-nm CMOS PA Using Chebyshev Artificial-Transmission-Line-Based Matching for Wideband Power Splitting and Combining

A 124-152 GHz > 15-dBm Psat28-nm CMOS PA Using Chebyshev Art...

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2022 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2022

作者： Zhang, Jincheng Wu, Tianxiang Chen, Yong Ren, Junyan Ma, Shunli Fudan University State Key Laboratory of Asic & System China IME/ECE-FST University of Macau State-Key Laboratory of Analog & Mixed-Signal Vlsi China

ISBN: (纸本)9781665496117

This paper presents a 124-152 GHz power amplifier (PA) with >15 dBm saturation output power (Psat) in a 28-nm CMOS process. Low-coupling transformer-based fourth-order matching networks are used to extend the bandwidth (BW) with low insertion loss and compact area. A four-way Chebyshev-type artificial-transmission-line-based power combiner is proposed to further improve the output power without sacrificing BW. The measurement results show that this P A can achieve a peak gain of 22.6 dB with 28 GHz 3-dB BW. The in-band Psat is >15 dBm with a maximum output power of 16.2 dBm at 135 GHz. The total area of the chip is 0.66 × 0.73 mm2 • © 2022 IEEE.

关键词： Power amplifiers

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Photonics-assisted intensity-modulation and direct-detection MIMO millimeter-wave system in the D-band

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Chinese Optics Letters 2025年第1期23卷 7-12页

作者： Jingwen Tan Peng Tian Jianjun Yu Xianming Zhao Xinglin Dou Long Zhang Xiongwei Yang YangHan Yi Wei Bing Zhang Qinyi Zhang Luhan Jiang Weiping Li Rahim Uddin Kaihui Wang Wen Zhou State Key Laboratory of ASIC and System Key Laboratory for Information Science of Electromagnetic Waves(MoE)School of Information Science and TechnologyFudan UniversityShanghai 200433China Beijing Hongshan Information Technology Research Institute Co. Ltd.Beijing 100176China

We experimentally demonstrate the transmission of discrete multi-tone(DMT)millimeter-wave(mm-wave)signals over a 1.2-km distance at the D-band(110–170 GHz)in a cost-effective intensity-modulation and direct-detection(IM/DD)communication *** the experiment,we successfully achieve the transmission of DMT-QPSK and DMT-16QAM mm-wave signals over multiple-input multiple-output(MIMO)*** the 1.2-km free-space transmission,the bit error rate(BER)of the DMT-16QAM is below the 25%soft decision forward error correction(25%SD-FEC)threshold of 4×10^(-2),with a maximum net bit rate of 24.62 Gbit/s achieved in this system.

关键词： D-band discrete multi-tone intensity modulation and direct detection long-distance wireless transmission photonics-assisted technique

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A 40nm CMOS Low-Power Multi-phase 4~8 GHz Frequency Divider with <0.1° Phase Error 16

A 40nm CMOS Low-Power Multi-phase 4~8 GHz Frequency Divider ...

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16th IEEE International Conference on Solid-state and Integrated Circuit Technology, ICSICT 2022

作者： Li, Qiaoan Li, Wei Pu, Yunyou Wang, Chuangguo Xu, Hongtao Xiao, Jianhong Fudan University State Key Laboratory of Asic & System Shanghai201203 China Xinyi Information Technology Ltd China

ISBN: (数字)9781665469067

ISBN: (纸本)9781665469067

To improve I/Q mismatch in high frequency multi-phase frequency divider, a phase error calibration scheme is proposed for a low-power multi-phase 4~8 GHz frequency divider. This frequency divider with phase calibration scheme is implemented in 40nm CMOS process. Post-simulation results show that the phase tuning range is about 1.6° with a 0.1° step with phase noise of -157.1~ -144.3dBc/Hz at 10MHz offset over band of interest. The total power consumption is 1.21~2.19mW from a 1.1V supply voltage, and core area is 0.0455 × 0.0084 mm2. © 2022 IEEE.

关键词： CMOS integrated circuits

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Material Surface Classification Based on 24GHz FMCW MIMO Radar

Material Surface Classification Based on 24GHz FMCW MIMO Rad...

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IEEE International Wireless Symposium (IWS)

作者： Shuai Hao Ruizhi Liu Botao Jiang Yue Lin Hongtao Xu State Key Laboratory of ASIC and System Fudan University China ICLegend Micro Nanjing China

ISBN: (数字)9798350389999

ISBN: (纸本)9798350390001

Surface classification using millimeter wave radar commonly focuses on road condition monitoring, in this area the roughnesses of different surfaces change noticeably. Another challenge is that it’s usually difficult for radar system to recognize various materials when radar is fixed on a moving platform. In this paper, we will introduce a system capable of recognizing 3 materials: carpet, tiles and wooden floors based on 24GHz FMCW MIMO radar. Particularly, this system mainly considers scenarios where radar is fixed on a moving platform. Full-connect neural network and support vector machine (SVM) are employed for classification, achieving a current accuracy of up to 99.04%.

关键词： Support vector machines Wireless communication Accuracy Surface waves MIMO radar Roads Millimeter wave radar Surface roughness Rough surfaces Floors

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Machine Learning-Based Radar Indoor Human Target Loss Judgment

Machine Learning-Based Radar Indoor Human Target Loss Judgme...

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IEEE International Wireless Symposium (IWS)

作者： Ruizhi Liu Botao Jiang Yue Lin Hongtao Xu State Key Laboratory of ASIC and System Fudan University China ICLegend Micro Nanjing China

ISBN: (数字)9798350389999

ISBN: (纸本)9798350390001

Radar struggles to detect stationary targets due to clutter interference. In indoor applications, the transition of a person from an active to a stationary state can result in target loss. This is difficult to distinguish from target loss caused by a person leaving the room. This paper proposes a machine learning-based method that leverages transient Doppler information before target loss for fast and accurate judgment. Two types of neural networks are experimented, and triggering mechanism are used to reduce the consumption of computational resources. Results on the collected dataset demonstrate the effectiveness of our approach.

关键词： Wireless communication Accuracy Radar clutter Neural networks Stationary state Radar detection Object detection Doppler radar Doppler effect Transient analysis

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Hardware-Friendly Block Variable-Length Sampling Pruning for Graph Neural Networks 66

Hardware-Friendly Block Variable-Length Sampling Pruning for...

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2023 IEEE 66th International Midwest Symposium on Circuits and systems, MWSCAS 2023

作者： Zhang, Jing Chen, Gengsheng Ke, Lingyun Ding, Luchang Fan, Xin Wu, Zehao Shen, Lei Cai, Chang Fudan University State Key Laboratory of Asic and System Shanghai China Shanghai Fudan Microelectronics Group Company Limited Shanghai China University of Chinese Academy of Sciences Beijing China

ISBN: (纸本)9798350302103

Graph Neural Networks (GNNs) have achieved success in graph-based applications. Despite the proposed technologies are useful to speed up GNNs, the existing pruning methods still require extra costs and are hardly able to improve the hardware efficiency. Here, we propose a Block Variable-length Sampling Pruning (BVSP) method to balance the hardware workload, reduce the redundancy of graph structure, alleviate data sparsity, and improve the efficiency of hardware acceleration. Two sampling strategies for different scenarios are proposed. We evaluate our method on datasets and models, and it is verified that our method can achieve a pruning ratio of 10%to 50% and reduce the hardware scheduling workloads by 60% to 99% without any accuracy loss and extra costs. © 2023 IEEE.

关键词： Graph Neural Networks Graph Pruning Variable-length Workload

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A 50-MHz Bandwidth and 50.6-dBm OOB-IIP3 Transimpedance Amplifier Based on a Three-Stage Pseudo-Differential OTA

A 50-MHz Bandwidth and 50.6-dBm OOB-IIP3 Transimpedance Ampl...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Cong Tao Liangbo Lei Zhiliang Hong Yumei Huang State Key Laboratory of ASIC and System Fudan University Shanghai China

A 50 MHz bandwidth (BW) transimpedance ampli-fier (TIA) is designed for 5G Sub-6GHz SAW-less current-mode receivers (RX). It's based on an operational transconductance amplifier (OTA). To tolerate blockers, the TIA must exhibit excellent in-band (IB) and out-of-band (OOB) linearity, which in turn requires OTAs with high BW and gain. Traditional two-stage OTAs struggle to achieve this under low power consumption (PC), so this paper employs a three-stage OTA. A pseudo-differential structure without the tail current source is used to accommodate low supply voltages (Vdd). Differential-mode (DM) stability relies on feedforward (FF) compensation within the OTA and zero compensation in the feedback network. Common mode (CM) is stabilized by five different common mode rejection (CMR) techniques. The circuit is designed and simulated in a 40 nm low power (LP) CMOS technology with a Vdd of 1.2V. The post-layout simulation results show that when IM3 is set to 30 MHz, the TIA's IB and OOB IIP3 reach 31.6 dBm and 50.6 dBm, respectively. The minimum input-referred noise (IRN) is 5.14 $\mathbf{nV}/\sqrt{Hz}$ . The corresponding FoM value is as high as 186.3 dBJ- 1 , exceeding all previous designs. The chip consumes 10.4 mW of power and occupies only 0.016mm 2 .

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A Cascade Structure with Burst Charging Mode for RF Energy Harvesting

A Cascade Structure with Burst Charging Mode for RF Energy H...

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IEEE International Conference on RFID

作者： Haoyu Jiang Yuxiao Zhao Zihan Wu Hao Min State Key Laboratory of ASIC & System Fudan University Shanghai China

This paper presents a novel RF energy harvest system with a burst charging mode, which achieves high sensitivity. The popular method to output high DC voltage under low input power is increasing the number of stages of the RF rectifier. However, this reduces the amplitude of the input RF signal and increases the power loss. When the amplitude of input RF signal is lower than the threshold voltage of MOSFET, the power conversion efficiency (PCE) of rectifier will drop sharply. Based on this principle, the proposed architecture uses a three-stage rectifier to output a direct-current (DC) voltage that exceeds the threshold voltage, and then uses a low-frequency charge pump working with a burst operation mode to output a high voltage. The post-layout simulation results show a -38.2 dBm sensitivity for 1 V output across a capacitive load in a 55nm CMOS process technology.

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