Xiaochen Tang, Full Professor, Doctoral supervisor, with research areas in analog/mixed-signal/digital integrated circuit design, specifically focusing on smart healthcare, physiological signal sensing front-end chips, analog front-end chips, and lightweight artificial intelligence chip design, etc. He was a postdoctoral scholar at Texas A&M University mentored by Professor Roozbeh Jafari. Prior to UESTC, he joined the New Mexico State University as an assistant professor. As the technical lead, he has headed four projects funded by the National Science Foundation of the United States, with total research funding exceeding 1.1 million dollars. He has published over 30 papers in high-level journals and conferences in the field of integrated circuits, including flagship conferences in chip design like IEEE CICC and RFIC, and leading journals such as IEEE JSSC, TCAS-I, JETCAS, TBioCAS, TBME, TAI, etc. He serves as a committee member of the IEEE Flexible and Wearable Circuits and Systems Standards Committee and the UNIC-CASS Open Source General-Purpose Integrated Circuit Committee. He has also served as the session chair of the IEEE Artificial Intelligence Circuits and Systems Conference (IEEE AICAS), and as a technical committee member for the GLSVLSI international conference on integrated circuits. He has received research awards like the NMSU Merit-based Enhancement Award.

Publications:

Books

1.     S. Liu, P. Reviriego, X. Tang, F. Lombardi, (2024). Error-Tolerant Techniques for Classifiers Beyond Neural Networks for Dependable Machine Learning. In: Liu, W., Han, J., Lombardi, F. (eds) Design and Applications of Emerging Computer Systems. Springer, Cham. (Chapter)

Journal Papers

1.     S. Liu, J. Rossello, S. Liu, X. Tang, J. Rossello, C. Frasser, W. Qian, J. Han, P. Reviriego, F. Lombardi, " From Multipliers to Integrators: a Survey of Stochastic Computing Primitives," IEEE Transactions on Nanotechnology, 2024（Early Access）.

2.     Z. Wang, Z. Wang, Y. Wang, X. Tang, Y. Wang, " An SP10T Switch With Reconfigurable Matching and Symmetrical Routing Topologies Functioning From DC to 18 GHz," IEEE Journal of Solid-State Circuits, 2023（Early Access）.

3.     X. Tang, M. Pinon, W. Tang, " Second-order Level-crossing Sampling Analog to Digital Converter for Electrocardiogram Delineation and Premature Ventricular Contraction Detection," IEEE Transactions on Biomedical Circuits and Systems, 2023（Early Access）.

4.     X. Tang, P. Reviriego, W. Tang, D. Mitchell, F. Lombardi, S. Liu, "Joint Learning and Channel Coding for Error-Tolerant IoT Systems based on Machine Learning," IEEE Transactions on Artificial Intelligence, 2023（Early Access）.

5.     X. Tang, S. Liu, F. Niknia, Z. Wang, S. Liu, P. Reviriego, F. Lombardi, "Delta Sigma Modulator-based Dividers for Accurate and Low Latency Stochastic Computing Systems," IEEE Journal on Emerging and Selected Topics in Circuits and Systems, vol. 13, no. 1, pp 270 – 284, 2023.

6.     X. Tang, M. Pinon, W. Tang. " Dynamic Predictive Sampling Analog to Digital Converter for Sparse Signal Sensing," IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 70, no. 7, pp 2360 – 2364, 2023.

7.     M. Pinon, X. Tang, W. Tang. " Real-time In-Sensor Slope Level-crossing Sampling for Key Sampling Points Selection for Wearable and IoT Devices," IEEE Sensors Journal, vol. 23, no. 6, pp 6233 – 6242, 2023.

8.     S. Chen, X. Tang, F. Yan, S. Ma, D. Shi, Y. Liang, M. Cai, T. Mi, Y. Wang. " A 0.8-to-18 GHz Nonuniform Distributed PA Using Reconfigurable Bias Choke in 0.15 m GaAs pHEMT," IEEE Microwave and Wireless Components Letters, vol. 33, no. 9, pp. 1309-1312, 2023.

9.     X. Tang, S. Liu, P. Reviriego, F. Lombardi, W. Tang, "A Near-Sensor ECG Delineation and Arrhythmia Classification System," IEEE Sensors Journal, vol. 22, no. 14, pp 14217 – 14227, 2022.

10.  X. Tang, S. Liu, F. Niknia, P. Reviriego, Z. Wang, W. Tang, A. Louri, F. Lombardi, "A Delta Sigma Modulator-Based Stochastic Divider," IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 69, no. 8, pp. 3272-3283, 2022.

11.  X. Tang, W. Tang, "An ECG Delineation and Arrhythmia Classification System using Slope Variation Measurement by Ternary Second-Order Delta Modulators for Wearable ECG Sensors," IEEE Transactions on Biomedical Circuits and Systems, vol. 15, no. 5, pp. 1053-1065, 2021.

12.  Y. Liu, X. Tang, W. Tang. "Ternary LDPC Error Correction for Arrhythmia Classification in Wireless Wearable Electrocardiogram Sensors," IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 69, no. 1, pp. 389-400, 2021.

13.  S. Liu, X. Tang, F. Niknia, P. Reviriego, W. Liu, A. Louri, F. Lombardi. "Stochastic Dividers for Low Latency Neural Networks, " IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 68, no. 10, pp 4102-4115, 2021.

14.  Q. Hu, X. Tang, W. Tang. "A Real-time Patient-Specific Sleeping Posture Recognition System using Pressure Sensitive Conductive Sheet and Transfer Learning," IEEE Sensors Journal, vol. 21, no. 5, pp 6869 – 6879, 2021.

15.  X. Tang, Q. Hu, W. Tang, "A Real-time Arrhythmia Heartbeats Classification Algorithm using Parallel Delta Modulations and Rotated Linear-kernel Support Vector Machines," IEEE Transactions on Biomedical Engineering, vol. 67, no. 4, pp. 978-986, 2020.

16.  Q. Hu, X. Tang, W. Tang. "A Smart Chair Sitting Posture Recognition System using Flex Sensors and FPGA Implemented Artificial Neural Network," IEEE Sensors Journal, vol. 20, no. 14. pp 8007-8016, 2020.

17.  S. Liu, P. Reviriego, X. Tang, W. Tang, F. Lombardi, "Result-Based Re-computation (RBR) for Error- Tolerant Classification by a Support Vector Machine (SVM)," IEEE Transactions on Artificial Intelligence, vol. 1, no. 1. pp 62-73, 2020.

18.  W. Tang, P. Furth, V. Nammi, G. Panwar, V. Ibarra, X. Tang, G. Unguz, S. Misra, "An Aquatic Wireless Biosensor for Electric Organ Discharge with an Integrated Analog Front End," IEEE Sensors Journal, vol. 19, no. 15, pp. 6260-6269, 2019.

19.  X. Tang, Q. Hu, W. Tang, "A Real-time QRS Detection System with PR/RT Interval and ST Segment Measurements for Wearable ECG Sensors using Parallel Delta Modulators," IEEE Transactions on Biomedical Circuits and Systems, vol. 12, no. 4, pp. 751-761, 2018.

20.  Q. Hu, X. Tang, W. Tang. "Integrated Asynchronous Ultrawideband Impulse Radio with Intrinsic Clock and Data Recovery," IEEE Microwave and Wireless Components Letters, vol. 27, no. 4, pp. 416-418, 2017.

21.  X. Tang, Q. Hu, W. Tang. "Delta–Sigma Encoder for Low-Power Wireless Bio-Sensors Using Ultrawideband Impulse Radio," IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 64, no. 7, pp. 747-751, 2016.

Conference papers

1.     Z. Wang, Y. Wang, Z. Wang, X. Tang, Y. Wang, " A DC-to-18 GHz High Power and Low Loss Band-Divided SP3T Switch with Reconfigurable Pole-to-Throw Network in 0.25-µm GaN," in 2023 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), 2023, pp. 77-80.

2.     Z. Wang, Z. Wang, Y. Wang, X. Tang, Y. Wang, "A DC-to-12 GHz 1.4–2.5 dB IL 4×8 Switch Matrix with Three-Port Reconfigurable Inter-Stage Matching Network," in 2023 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), 2023, pp. 73-76.

3.     Z. Wang, M. Chen, X. Li, X. Tang, X. Li, Y. Wang, "A 2.5-to-18GHz Reconfigurable LNA With 1.38-to- 1.97dB NF Using Switchable Diplexer and Low-Noise Oriented Input," in 2023 IEEE MTT-S International Microwave Symposium (IMS), 2023, pp. 131-134.

4.     X. Tang, S. Liu, F. Niknia, W. Tang, P. Reviriego, F. Lombardi, "Integrating Delta Modulation and Stochastic Computing for Real-time Machine Learning based Heartbeats Monitoring in Wearable Systems," in 2023 IEEE 5th International Conference on Artificial Intelligence Circuits and Systems (AICAS), 2023.

5.     X. Tang, S. Liu, W. Che, W. Tang, "Tampering Attack Detection in Analog to Feature Converter for Wearable Biosensor," in 2022 IEEE International Symposium of Circuits and Systems (ISCAS), 2022, pp. 1150-1154.

6.     S. Liu, X. Tang, P. Reviriego, W. Liu, W. Tang, F. Lombardi, "Low-Power k Nearest Neighbors Classifiers with Approximate Nanoscale Memories," in 2022 IEEE 22nd International Conference on Nanotechnology (NANO), 2022.

7.     S. Liu, J. Guo, X. Tang, P. Reviriego, F. Lombardi, "A Polarity-Driven Radiation-Hardened Latch design for Single Event Upset Tolerance," in 2022 IEEE International Symposium on Defect and Fault Tolerance in VLSI and Nanotechnology Systems (DFT), 2022.

8.     X. Tang, M. Jankovic, R. Jafari, "A Novel Non-invasive Radial Artery Compliance Measuring Method using Bio-Impedance," in 2021 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2021.

9.     X. Tang, W. Tang, "A 151 nW Second-Order Ternary Delta Modulator for ECG Slope Variation Measurement with Baseline Wandering Resilience," in 2020 IEEE Custom Integrated Circuits Conference (CICC), Boston, MA, USA, 2020, pp. 1-4.

10.  X. Tang, Q. Hu, W. Tang, "Analog to Digital Feature Converter based on Oversampling Modulators for ECG Delineation," in 2019 IEEE 62^nd International Midwest Symposium on Circuits and Systems (MWSCAS), Dallas, TX, August 2019, pp. 121-124.