@article {5176, title = {A 2.3-5.7μW Tri-Modal Self-Adaptive Photoplethysmography Sensor Interface IC for Heart Rate, SpO2 , and Pulse Transit Time Co-Monitoring}, journal = {IEEE Transactions on Biomedical Circuits and Systems}, year = {2024}, author = {Peng Wang and Rishika Agarwala and Natalie Ownby and Xinjian Liu and Benton H. Calhoun} } @conference {5126, title = {A 6nA Fully-Autonomous Triple-Input Hybrid-Inductor-Capacitor Multi-Output Power Management System with Multi-Rail Energy Sharing, All-Rail Cold Startup, and Adaptive Conversion Control for mm-scale Distributed Systems}, booktitle = {2024 IEEE International Solid-State Circuits Conference (ISSCC)}, year = {2024}, month = {2024}, author = {Xinjian Liu and Anjali Agrawal and Akiyoshi Tanaka and Benton H. Calhoun} } @article {5166, title = {A Sub-{\textmu}W Energy-Performance-Aware IoT SoC with a Triple-Mode Power Management Unit for System Performance Scaling, Fast DVFS, and Energy Minimization}, journal = {IEEE Journal of Solid-State Circuits}, year = {2024}, author = {Xinjian Liu and Sumanth Kamineni and Jacob Breiholz and Benton H. Calhoun and Shuo Li} } @conference {5111, title = {A -102dBm Sensitivity, 2.2{\textmu}A Packet-Level-Duty-cycled Wake-Up Receiver with ADPLL achieving -30dB SIR}, booktitle = {IEEE Custom Integrated Circuits Conference (CICC)}, year = {2023}, author = {Linsheng Zhang and Divya Duvvuri and Suprio Bhattacharya and Anjana Dissanayake and Xinjian Liu and Henry L. Bishop and Yaobin Zhang and Travis N. Blalock and Benton H. Calhoun and Steven M. Bowers} } @conference {5116, title = {A 1pJ/Bit Bypass-SPI Interconnect Bus with I2C Conversion Capability and 2.3nW Standby Power for Fabric Sensing Networks}, booktitle = {2023 IEEE Biomedical Circuits and Systems Conference}, year = {2023}, author = {Xinjian Liu and Zhenghong Chen and Nugaira Gahan Mim and Anjali Agrawal and Benton H. Calhoun} } @conference {5121, title = {A 33nW Fully Autonomous SoC with Distributed Cooperative Energy Harvesting and Multi-Chip Power Management for mm-scale System-in-Fiber}, booktitle = {IEEE Transactions on Biomedical Circuits and Systems, Invited paper}, year = {2023}, author = {Xinjian Liu and Daniel S. Truesdell and Omar Faruqe and Lalitha Parameswaran and Michael Rickley and Andrew Kopanski and Lauren Cantley and Austin Coon and Matthew Bernasconi and Tairan Wang and Benton H. Calhoun} } @conference {5096, title = {A Self-Powered SoC with Distributed Cooperative Energy Harvesting and Multi-Chip Power Management for System-in-Fiber}, booktitle = {IEEE International Solid-State Circuits Conference (ISSCC)}, year = {2023}, month = {2023}, author = {Xinjian Liu and Daniel S. Truesdell and Omar Faruqe and Lalitha Parameswaran and Michael Rickley and Andrew Kopanski and Lauren Cantley and Austin Coon and Matthew Bernasconi and Tairan Wang and Benton H. Calhoun} } @article {5056, title = {A 184 nW, -78.3 dBm Sensitivity Antenna-Coupled Supply, Temperature, and Interference-Robust Wake-up Receiver at 4.9 GHz}, journal = {IEEE Transactions on Microwave Theory and Techniques}, year = {2022}, author = {Xiaochuan Shen and Divya Duvvuri and Pouyan Bassirian and Henry L. Bishop and Xinjian Liu and Anjana Dissanayake and Yaobin Zhang and Travis N. Blalock and Benton H. Calhoun and Steven M. Bowers} } @conference {5046, title = {A 194nW Energy-Performance-Aware IoT SoC Employing a 5.2nW 92.6\% Peak Efficiency Power Management Unit for System Performance Scaling, Fast DVFS and Energy Minimization}, booktitle = {IEEE International Solid-State Circuits Conference (ISSCC)}, year = {2022}, author = {Xinjian Liu and Sumanth Kamineni and Jacob Breiholz and Benton H. Calhoun and Shuo Li} } @conference {5041, title = {A 32nA Fully Autonomous Multi-Input Single-Inductor Multi-Output Energy Harvesting and Power Management Platform with 1.2{\texttimes}10^5 Dynamic Range, Integrated MPPT, and Multi-Modal Cold Start-Up}, booktitle = {IEEE International Solid-State Circuits Conference (ISSCC)}, year = {2022}, author = {Shuo Li and Xinjian Liu and Benton H. Calhoun} } @conference {5086, title = {A 956pW Switched-Capacitor Sub-Bandgap Reference with 0.44-to-3.3V Supply Range, -67dB PSRR, and 0.2\% within-Wafer Inaccuracy for Nanowatt IoT Systems}, booktitle = {2022 IEEE European Solid-State Circuits Conference (ESSCIRC)}, year = {2022}, author = {Shuo Li and Xinjian Liu and Benton H. Calhoun} } @conference {5071, title = {NanoWattch: A Self-Powered 3-nW RISC-V SoC Operable from 160mV Photovoltaic Input with Integrated Temperature Sensing and Adaptive Performance Scaling}, booktitle = {2022 IEEE Symposium on VLSI Circuits (VLSI), (Equally-Credited Authors)}, year = {2022}, author = {Daniel S. Truesdell and Xinjian Liu and Jacob Breiholz and Shourya Gupta and Shuo Li and Benton H. Calhoun} } @article {5066, title = {A Sub-nW 93\% Peak Efficiency Buck Converter with Wide Dynamic Range, Fast DVFS, and Asynchronous Load-Transient Control}, journal = {IEEE Journal of Solid-State Circuits, (invited paper)}, year = {2022}, author = {Xinjian Liu and Benton H. Calhoun and Shuo Li} } @conference {5021, title = {A 366 nW, -74.5 dBm Sensitivity Antenna-Coupled Wakeup Receiver at 4.9 GHz with Integrated Voltage Regulation and References}, booktitle = {IEEE MTT-S International Microwave Symposium (IMS)}, year = {2021}, address = {Atlanta, GA}, author = {Divya Duvvuri and X. Shen and P. Bassirian and Henry L. Bishop and Xinjian Liu and Chien-Hen Chen and Anjana Dissanayake and Yaobin Zhang and T. N. Blalock and Benton H. Calhoun and Steven M. Bowers} } @conference {5011, title = {An 802pW 93\% Peak Efficiency Buck Converter with 5.5{\texttimes}106 Dynamic Range Featuring Fast DVFS and Asynchronous Load-Transient Control}, booktitle = {2021 IEEE European Solid-State Circuits Conference (ESSCIRC)}, year = {2021}, month = {09/2021}, author = {Xinjian Liu and Shuo Li and Benton H. Calhoun} }