Conferences

[C16] S. Li, X. Liu and B. H. Calhoun, “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,” IEEE 48th European Solid-State Circuits Conference (ESSCIRC), 2022, pp. 465-468.

[C15] D. S. Truesdell, X. Liu, J. Breiholz, S. Gupta, S. Li and B. H. Calhoun, “NanoWattch: A Self-Powered 3-nW RISC-V SoC Operable from 160mV Photovoltaic Input with Integrated Temperature Sensing and Adaptive Performance Scaling,” 2022 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits), 2022, pp. 210-211.

[C14] S. Li, X. Liu and B. H. Calhoun, “A 32nA Fully Autonomous Multi-Input Single-Inductor Multi-Output Energy-Harvesting and Power-Management Platform with 1.2×105 Dynamic Range, Integrated MPPT, and Multi-Modal Cold Start-Up,” 2022 IEEE International Solid-State Circuits Conference (ISSCC), 2022, pp. 1-3.

[C13] X. Liu, S. Kamineni, J. Breiholz, B. H. Calhoun and S. Li, “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,” 2022 IEEE International Solid-State Circuits Conference (ISSCC), 2022, pp. 1-3.

[C12] X. Liu, S. Li and B. H. Calhoun, “An 802pW 93% Peak Efficiency Buck Converter with 5.5×106 Dynamic Range Featuring Fast DVFS and Asynchronous Load-Transient Control,”IEEE 47th European Solid-State Circuits Conference (ESSCIRC), 2021, pp. 347-350.

[C11] J. Im, J. Breiholz, S. Li, B. H. Calhoun and D. D. Wenzloff, “A Fully Integrated 0.2V 802.11ba Wake-Up Receiver with -91.5dBm Sensitivity,” 2020 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), Los Angeles, CA, USA, 2020, pp. 339-342.

[C10] S. Li, J. Breiholz, S. Kamineni, J. Im, D. D. Wentzloff and B. H. Calhoun, “An 85nW IoT Node-Controlling SoC for MELs Power-Mode Management and Phantom Energy Reduction,” 2020 IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, 2020, pp. 1-5.(Best Paper Award)

[C9] D. S. Truesdell, S. Li and B. H. Calhoun, “A 0.5V 560kHz 18.8fJ/Cycle Ultra-Low Energy Oscillator in 65nm CMOS with 96.1ppm/°C Stability using a Duty-Cycled Digital Frequency-Locked Loop,” 2020 IEEE Symposium on VLSI Circuits (VLSIC), Honolulu, HI, USA, 2020, pp.1-2.

[C8] S. Li and B. H. Calhoun, “Sub-microAmp Energy Harvesting and Power Management Units for Self-Powered IoT SoCs: Analog vs. Digital Implementations,” 2020 IEEE Custom Integrated Circuits Conference (CICC) (Invited Paper), Boston, MA, USA, 2020, pp. 1-8.

[C7] S. Li, A. Roy and B. H. Calhoun, “A Piezoelectric Energy-Harvesting System with Parallel-SSHI Rectifier and Integrated MPPT Achieving 417% Energy-Extraction Improvement and 97% Tracking Efficiency,” 2019 Symposium on VLSI Circuits (VLSIC),Kyoto, pp. C324-C325.

[C6] S. Li and B. H. Calhoun, “A 745pA Hybrid Asynchronous Binary-Searching and Synchronous Linear-Searching Digital LDO with 3.8×105 Dynamic Load Range, 99.99% Current Efficiency, and 2mV Output Voltage Ripple,” 2019 IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 2019, pp. 232-234.

[C5] F. B. Yahya, C. J. Lukas, J. Breiholz, A. Roy, X. Chen, H. N. Patel, N. Liu, A. Kosari, S. Li, D.A. Kamakshi, O. Ayorinde, D. D. Wentzloff and B. H. Calhoun., “A battery-less 507nW SoC with integrated platform power manager and SiP interfaces,” 2017 Symposium on VLSI Circuits (VLSIC), Kyoto, pp. C338-C339.

[C4] J. Moody, P. Bassirian, A. Roy, Y. Feng, S. Li, R. Costanzo, N. S. Barker, B. H. Calhoun and S. M. Bowers, “An 8.3 nW -72 dBm Event Driven IoE Wake up Receiver RF Front End,” 12th European Microwave Integrated Circuits Conference (EuMIC), Nuremberg, 2017, pp.77-80.

[C3] S. Li, X. Zhou, S. Zhang, H. Yao, Q. Li, V. Behravan, A. Natarajan, Z. Hong and P. Y. Chiang “A 0.45V 687pW Low Noise Amplifi er Front-End with 1.73 NEF for Energy-Scavenging IoT Sensors,” 2016 IEEE MTT-S International Wireless Symposium (IWS),Shanghai, 2016, pp. 1-4.

[C2] V. Behravan, S. Li, N. E. Glover, C. Chen, M. Shoaib, G. C. Temes and P. Y. Chiang, “A Compressed-Sensing Sensor-on-Chip Incorporating Statistics Collection to Improve Reconstruction Performance,” 2015 IEEE Custom Integrated Circuits Conference (CICC), SanJose, CA, 2015, pp. 1-4.

[C1] S. Li, N. Qi, V. Behravan, Z. Hong and P. Y. Chiang, “A 20 μW Dual-Channel Analog Front-End in 65nm CMOS for Portable ECG Monitoring System,” IEEE 11th International Conference on ASIC (ASICON), Chengdu, 2015, pp. 1-4.

Journals

[J6] X. Liu, S. Kamineni, J. Breiholz, B. H. Calhoun and S. Li, “A Sub-µW Energy-Performance-Aware IoT SoC with a Triple-Mode Power Management Unit for System Performance Scaling, Fast DVFS, and Energy Minimization,” IEEE Journal of Solid-State Circuits (JSSC), preprints, 2024

[J5] S. Gupta, S. Li and B. H. Calhoun, “Scalable All-Analog LDOs With Reduced Input Offset Variability Using Digital Synthesis Flow in 65-nm CMOS,” in IEEE Transactions on Very Large Scale Integration (VLSI) Systems, vol. 32, no. 1, pp. 190-194, Jan. 2024.

[J4] X. Liu, B. H. Calhoun and S. Li, “A Sub-nW 93% Peak Efficiency Buck Converter With Wide Dynamic Range, Fast DVFS, and Asynchronous Load-Transient Control,” in IEEE Journal of Solid-State Circuits (JSSC), vol. 57, no. 7, pp. 2054-2067, July 2022.

[J3] D. S. Truesdell, S. Li and B. H. Calhoun, “A 0.5-V 560-kHz 18.8-fJ/Cycle On-Chip Oscillator With 96.1-ppm/°C Steady-State Stability Using a Duty-Cycled Digital Frequency-Locked Loop,” in IEEE Journal of Solid-State Circuits (JSSC), vol. 56, no. 4, pp. 1241-1253, April 2021.

[J2] S. Li, A. Roy and B. H. Calhoun, “A Piezoelectric Energy-Harvesting System With Parallel-SSHI Rectifi er and Integrated Maximum-Power-Point Tracking,” in IEEE Solid-State Circuits Letters (Invited), vol. 2, no. 12, pp. 301-304, Dec. 2019.

[J1] C. J. Lukas, F. B. Yahya, J. Breiholz, A. Roy, X. Chen, H. N. Patel, N. Liu, A. Kosari, S. Li, D.A. Kamakshi, O. Ayorinde, D. D. Wentzloff, B. H. Calhoun, “A 1.02 μW Battery-Less,Continuous Sensing and Post-Processing SiP for Wearable Applications,” in IEEE Transactions on Biomedical Circuits and Systems, vol. 13, no. 2, pp. 271-281, April 2019.