Publications

Journal Publications

B. Shen, S. Bose, and M. L. Johnston, “A frequency-locked oscillator using complex RC impedance IQ-balancing,” IEEE Journal of Solid-State Circuits (JSSC), vol. 57, 2022. (Invited)
– Among 50 most downloaded IEEE JSSC articles in Feb 2022 and March 2022.
S. Bose, T. Anand and M. L. Johnston, “A 3.5 mV Input Single-Inductor Self-Starting Boost Converter with Loss-Aware MPPT for Efficient Autonomous Body-Heat Energy Harvesting,” in IEEE Journal of Solid-State Circuits (JSSC).
– Among 50 most downloaded IEEE JSSC articles in June 2021.
S. Bose, B. Shen and M. L. Johnston, “A Batteryless Motion-Adaptive Heartbeat Detection System-on-Chip Powered by Human Body Heat,” in IEEE Journal of Solid-State Circuits (JSSC), Nov. 2020. (Invited)
– Among 50 most downloaded IEEE JSSC articles in October 2020 and November 2020.
S. Bose, T. Anand, and M. L. Johnston, “Integrated cold start of a boost converter at 57 mV using cross-coupled complementary charge pumps and ultra-low-voltage ring oscillator,” in IEEE Journal of Solid-State Circuits (JSSC), vol. 54, 2019.
T.-H. Chou, S. Yu, S. Bose, J. Cook, J. Park, and M. L. Johnston, “Wireless, multi-sensor systemon-chip for ph and amperometry powered by body heat,” in IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), 2023. (Invited)
S. Yu, T.-H. Chou, S. Bose, J. Cook, J. Park, and M. L. Johnston, “A reconfigurable tri-mode frequency-locked loop readout circuit for biosensor interfaces,” IEEE Transactions on Biomedical Circuits and Systems (TBioCAS), 2023. (Invited)
B. Shen, S. Bose and M. L. Johnston, “Fully-Integrated Charge Pump Design Optimization for Above-Breakdown Biasing of Single-Photon Avalanche Diodes in 0.13-µm CMOS,” in IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 66, no. 3, pp. 1258-1269, March 2019.
B. Shen, S. Bose and M. L. Johnston, “A 1.2 V–20 V Closed-Loop Charge Pump for High Dynamic Range Photodetector Array Biasing,” in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 66, no. 3, pp. 327-331, March 2019.
S. Bose, H. Ouh, S. Sengupta and M. L. Johnston, “Parametric Study of p-n Junctions and Structures for CMOS-Integrated Single-Photon Avalanche Diodes,” in IEEE Sensors Journal, vol. 18, no. 13, pp. 5291-5299, 1 July1, 2018.

Conference Publications

S. Krishnamurthy, S. Mondal, J. Qiu, T. Acikalin, S. Bose, S. Yamada, J. Jaussi, and M. Mansuri, “A 0.9pJ/b 108Gb/s PAM4 VCSEL-Based Direct-Drive Optical Engine,” in 2025 IEEE International Solid-State Circuits Conference (ISSCC).
S. Krishnamurthy, S. Mondal, J. Qiu, J. Kennedy, S. Bose, T. Acikalin, S. Yamada, J. Jaussi, and M. Mansuri, “A 4x50Gb/s NRZ 1.5pJ/b Co-Packaged and Fiber-Terminated 4-Channel Optical Rx,” in 2024 Symposium on VLSI Circuits (VLSI).
– Press highlight
S. Mondal, J. Qiu, S. Krishnamurthy, J. Kennedy, S. Bose, T. Acikalin, S. Yamada, J. Jaussi, and M. Mansuri, “A 4×64Gb/s 1.3pJ/bit Co-Packaged and Fiber-Terminated 4-Ch VCSEL-Based Optical Transmitter,” in 2024 IEEE International Solid- State Circuits Conference (ISSCC).
– Invited for demo
T. -H. Chou, S. Yu, J. Cook, J. Park, S. Bose and M. L. Johnston, “Body-Heat Powered Biosensor Readout using Current-mode Relaxation Oscillators,” 2022 IEEE Biomedical Circuits and Systems Conference (BioCAS), Taipei, Taiwan, 2022, pp. 130-134,
J. Kim, C.Votzke, S. Bose, A. Natarajan, and M. L. Johnston, “A 20μW, 0.05mm2 duty-cycled resistor and frequency-locked-loop-based wheatstone bridge interface for low resistance sensing systems,” 2021 IEEE Custom Integrated Circuits Conference (CICC), 2021.
S. Bose, B. Shen and M. L. Johnston, “A 20µW Heartbeat Detection System-on-Chip Powered by Human Body Heat for Self-Sustaining Wearable Healthcare,” in 2020 IEEE International Solid-State Circuits Conference – (ISSCC).
– Invited for demo & JSSC article
S. Bose, T. Anand and M. L. Johnston, “A 3.5mV Input, 82% Peak Efficiency Boost Converter with Loss-Optimized MPPT and 50mV Integrated Cold-Start for Thermoelectric Energy Harvesting,” 2019 IEEE Custom Integrated Circuits Conference (CICC), Austin, TX, USA, 2019, pp. 1-4.
S. Bose, T. Anand and M. L. Johnston, “Fully-integrated 57 mV cold start of a thermoelectric energy harvester using a cross-coupled complementary charge pump,” 2018 IEEE Custom Integrated Circuits Conference (CICC), San Diego, CA, 2018, pp. 1-4.
S. Bose and M. L. Johnston, “A Stacked-Inverter Ring Oscillator for 50 mV Fully-Integrated Cold-Start of Energy Harvesters,” 2018 IEEE International Symposium on Circuits and Systems (ISCAS), Florence, 2018, pp. 1-5.
H. Ouh, S. Sengupta, S. Bose and M. L. Johnston, “Dual-mode, enhanced dynamic range CMOS optical sensor for biomedical applications,” 2017 IEEE Biomedical Circuits and Systems Conference (BioCAS), Turin, 2017, pp. 1-4.
B. Shen, S. Bose and M. L. Johnston, “On-chip high-voltage SPAD bias generation using a dual-mode, closed-loop charge pump,” 2017 IEEE International Symposium on Circuits and Systems (ISCAS), Baltimore, MD, USA, 2017, pp. 1-4.
S. Bose and P. Mandal, “A fully differential amplifier with CMOS feedback biasing for sensing CMUT signals,” Proceedings of the 2014 IEEE Students’ Technology Symposium, Kharagpur, 2014, pp. 159-163.

Patents

S. Bose, N. Mishra, A. Puzhankara, M. Mahabaleshwara, and K. Swamiappan, “Strobe gatingadaption and training in a memory controller,” Dec. 6 2016. US Patent 9,514,420.
S. Bose, M. Johnston, and T. Anand, “Ultra low-voltage circuits,” July 2021. US Patent 11,070,129
S. Bose, T. Anand, and M. Johnston, “Integrated circuit for low-voltage thermoelectric energy harvesting with self-start,” Apr. 2020. US Patent 11,349,482.
S. Bose, B. Shen, and M. Johnston, “Low-power heart beat detection circuit architecture for body heat powered sensing,” Feb. 20 2020. US Patent App. 17/169,136, patent pending.
S. Bose, C. Yuan, S. Mondal, and M. Mansuri, “Self-clocked duty-cycle corrected current-integrating phase interpolator,” Dec 2023. US Patent App. 18/520,415, Patent pending.