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C. J. Lukas, Yahya, F. B., and Calhoun, B. H., An Ultra-low Power System On Chip Enabling DVS with SR Level Shifting Latches, in IEEE International Symposium on Circuits and Systems (ISCAS), Florence, Italy, 2018.
C. J. Lukas, Yahya, F. B., and Calhoun, B. H., Modeling Trans-threshold Correlations for Reducing Functional Test Time in Ultra-Low Power Systems, in 2017 IEEE International Test Conference (ITC), Fort Worth, TX, USA, 2017.
C. J. Lukas, Yahya, F. B., Breiholz, J., Roy, A., Chen, X., Patel, H. N., Liu, N. X., Kosari, A., Li, S., Kamakshi, D. Akella, Ayorinde, O., Wentzloff, D. D., and Calhoun, B. H., A 1.02 μW Battery-Less, Continuous Sensing and Post-Processing SiP for Wearable Applications, IEEE Transactions on Biomedical Circuits and Systems, 2019.PDF icon 08625544.pdf (3.22 MB)
C. J. Lukas and Calhoun, B. H., A 0.38 pJ/bit 1.24 nW Chip-to-Chip Serial Link for Ultra-Low Power Systems, in International Symposium on Circuits and Systems (ISCAS), Lisbon, 2015.
P. Long, Huang, J. Z., Povolotskyi, M., Verreck, D., Charles, J., Kubis, T., Klimeck, G., Rodwell, M. J. W., and Calhoun, B. H., A Tunnel FET Design for High-Current, 120 mV Operation, in IEDM, 2016.
X. Liu, Chen, Z., Mim, N. Gahan, Agrawal, A., and Calhoun, B. H., A 1pJ/Bit Bypass-SPI Interconnect Bus with I2C Conversion Capability and 2.3nW Standby Power for Fabric Sensing Networks, in 2023 IEEE Biomedical Circuits and Systems Conference, 2023.PDF icon A 1pJbit Bypass-SPI Interconnect Bus with I2C Conversion Capability and 2.3nW Standby Power for Fabric Sensing Networks.pdf (2.54 MB)
X. Liu, Truesdell, D. S., Faruqe, O., Parameswaran, L., Rickley, M., Kopanski, A., Cantley, L., Coon, A., Bernasconi, M., Wang, T., and Calhoun, B. H., A Self-Powered SoC with Distributed Cooperative Energy Harvesting and Multi-Chip Power Management for System-in-Fiber, in IEEE International Solid-State Circuits Conference (ISSCC), 2023.PDF icon 15.1_A_Self-Powered_SoC_with_Distributed_Cooperative_Energy_Harvesting_and_Multi-Chip_Power_Management_for_System-in-Fiber.pdf (1.51 MB)
N. X. Liu, Agarwala, R., Dissanayake, A., Truesdell, D. S., Kamineni, S., Chen, X., Wentzloff, D. D., and Calhoun, B. H., A 2.5 ppm/°C 1.05 MHz Relaxation Oscillator with Dynamic Frequency-Error Compensation and 8 µs Start-Up Time, in IEEE European Solid-State Circuits Conference (ESSCIRC), Dresden, Germany, 2018.
X. Liu, Li, S., and Calhoun, B. H., An 802pW 93% Peak Efficiency Buck Converter with 5.5×106 Dynamic Range Featuring Fast DVFS and Asynchronous Load-Transient Control, in 2021 IEEE European Solid-State Circuits Conference (ESSCIRC), 2021.PDF icon An 802pW 93% Peak Efficiency Buck Converter with 5.5×106 Dynamic Range Featuring Fast DVFS and Asynchronous Load-Transient Control.pdf (580.42 KB)
X. Liu, Kamineni, S., Breiholz, J., Calhoun, B. H., and Li, S., 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, 2024.PDF icon A_Sub-_mu_W_Energy-Performance-Aware_IoT_SoC_With_a_Triple_Mode_Power_Management_Unit_for_System_Performance_Scaling_Fast_DVFS_and_Energy_Minimization.pdf (7.38 MB)
N. X. Liu, Agarwala, R., Dissanayake, A., Truesdell, D. S., Kamineni, S., and Calhoun, B. H., A 2.5 ppm/°C 1.05 MHz Relaxation Oscillator with Dynamic Frequency-Error Compensation and Fast Start-Up Time, IEEE Journal of Solid-State Circuits (JSSC), 2019.
X. Liu, Agrawal, A., Tanaka, A., and Calhoun, B. H., 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, in 2024 IEEE International Solid-State Circuits Conference (ISSCC), 2024.PDF icon 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_Conve.pdf (1.55 MB)
X. Liu, Calhoun, B. H., and Li, S., A Sub-nW 93% Peak Efficiency Buck Converter with Wide Dynamic Range, Fast DVFS, and Asynchronous Load-Transient Control, IEEE Journal of Solid-State Circuits, (invited paper), 2022.PDF icon A SubnW 93 Peak Efficiency Buck Converter With Wide Dynamic Range Fast DVFS and Asynchronous Load Transient Control.pdf (3.94 MB)
X. Liu, Truesdell, D. S., Faruqe, O., Parameswaran, L., Rickley, M., Kopanski, A., Cantley, L., Coon, A., Bernasconi, M., Wang, T., and Calhoun, B. H., A 33nW Fully Autonomous SoC with Distributed Cooperative Energy Harvesting and Multi-Chip Power Management for mm-scale System-in-Fiber, in IEEE Transactions on Biomedical Circuits and Systems, Invited paper, 2023.PDF icon A_33nW_Fully_Autonomous_SoC_with_Distributed_Cooperative_Energy_Harvesting_and_Multi-Chip_Power_Management_for_mm-scale_System-in-Fiber.pdf (16.09 MB)
X. Liu, Kamineni, S., Breiholz, J., Calhoun, B. H., and Li, S., 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, in IEEE International Solid-State Circuits Conference (ISSCC), 2022.PDF icon A 194nW Energy-Performance-Aware IoT SoC Employing a 5.2nW 92.6% Peak Efficiency Power Management Unit for System Performance Scaling, Fa.pdf (4.4 MB)
N. Liu and Calhoun, B. H., Design Optimization of Register File Throughput and Energy using a Virtual Prototyping (ViPro) Tool, in IEEE Computer Society Annual Symposium on VLSI (ISVLSI), 2016.
S. Li, Roy, A., and Calhoun, B. H., A Piezoelectric Energy-Harvesting System with Parallel-SSHI Rectifier and Integrated Maximum-Power-Point Tracking, IEEE Solid-State Circuits Letters (SSCL), Special Issue on VLSI (invited paper), 2019.
S. Li, Liu, X., and Calhoun, B. H., A 32nA Fully Autonomous Multi-Input Single-Inductor Multi-Output Energy Harvesting and Power Management Platform with 1.2×10^5 Dynamic Range, Integrated MPPT, and Multi-Modal Cold Start-Up, in IEEE International Solid-State Circuits Conference (ISSCC), 2022.
S. Li, Liu, X., and Calhoun, B. H., 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, in 2022 IEEE European Solid-State Circuits Conference (ESSCIRC), 2022.
S. Li and Calhoun, B. H., Sub-microAmp Energy Harvesting and Power Management Units for Self-Powered IoT SoCs: Analog vs. Digital Implementations, in 2020 IEEE Custom Integrated Circuits Conference (CICC), (invited paper), 2020.
S. Li, Roy, A., and Calhoun, B. H., A Piezoelectric Energy-Harvesting System with Parallel-SSHI Rectifier and Integrated MPPT Achieving 417% Energy-Extraction Improvement and 97% Tracking Efficiency, in 2019 Symposium on VLSI Circuits, Kyoto, Japan, 2019.
S. Li, Breiholz, J., Kamineni, S., Im, J., Wentzloff, D. D., and Calhoun, B. H., An 85 nW IoT Node-Controlling SoC for MELs Power-Mode Management and Phantom Energy Reduction, in 2020 IEEE International Symposium on Circuits and Systems (ISCAS), 2020.
S. Li and Calhoun, B. H., 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, in IEEE International Solid- State Circuits Conference (ISSCC), San Francisco, CA, 2019.