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Conference Paper
S. Gupta, Li, S., and Calhoun, B. H., 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, 2023.
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)
S. Khanna, Craig, K., Shakhsheer, Y., Arrabi, S., Lach, J., and Calhoun, B., Stepped Supply Voltage Switching for Energy Constrained Systems, in ISQED, 2011.
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.
B. H. Calhoun, Zhang, Y., Khanna, S., Craig, K., Shakhsheer, Y., and Lach, J., A Sub-Threshold FPGA: Energy-Efficient Reconfigurable Logic, in GOMAC Tech, 2011.
P. Bassirian, Duvvuri, D., Truesdell, D. S., Liu, N. X., Calhoun, B. H., and Bowers, S. M., A Temperature-robust 27.6nW -65dBm Wakeup Receiver at 9.6GHz X Band, in 2020 IEEE International Solid-State Circuits Conference (ISSCC), 2020.
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.
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.
Journal Article
A. Kosari, Breiholz, J., Liu, N. X., Calhoun, B. H., and Wentzloff, D. D., A 0.5 V 68 nW ECG Monitoring Analog Front-End for Arrhythmia Diagnosis, Journal of Low Power Electronics and Applications (JLPEA), 2018.
D. S. Truesdell, Li, S., and Calhoun, B. H., A 0.5V 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, IEEE Journal of Solid-State Circuits, 2021.PDF icon A 0.5-V 560-kHz 18.8-fJ_Cycle On-Chip Oscillator With 96.1ppm_C Steady-State Stability Using a Duty-Cycled Digital Frequency-Locked Loop.pdf (2.95 MB)
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, 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, 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)
X. Shen, Duvvuri, D., Bassirian, P., Bishop, H. L., Liu, X., Dissanayake, A., Zhang, Y., Blalock, T. N., Calhoun, B. H., and Bowers, S. M., A 184 nW, -78.3 dBm Sensitivity Antenna-Coupled Supply, Temperature, and Interference-Robust Wake-up Receiver at 4.9 GHz, IEEE Transactions on Microwave Theory and Techniques, 2022.
P. Wang, Agarwala, R., Ownby, N., Liu, X., and Calhoun, B. H., A 2.3-5.7μW Tri-Modal Self-Adaptive Photoplethysmography Sensor Interface IC for Heart Rate, SpO2 , and Pulse Transit Time Co-Monitoring, IEEE Transactions on Biomedical Circuits and Systems, 2024.
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.
K. Craig, Shakhsheer, Y., Arrabi, S., Khanna, S., Lach, J., and Calhoun, B. H., A 32b 90nm Processor Implementing Panoptic DVS Achieving Energy Efficient Operation from Sub-threshold to High Performance, Journal of Solid State Circuits, 2014.
A. Roy, Klinefelter, A., Yahya, F., Chen, X., Gonzalez, P., Lukas, C. J., Akella, D., Boley, J., Craig, K., Faisal, M., Oh, S., Roberts, N., Shakhsheer, Y., Shrivastava, A., Vasudevan, D., Wentzloff, D. D., and Calhoun, B., A 6.45μW Self-Powered SoC with Integrated Energy-Harvesting Power Management and ULP Asymmetric Radios for Portable Biomedical Systems, IEEE Transactions on Biomedical Circuits and Systems, vol. 9, pp. 862-874, 2015.
D. S. Truesdell, Breiholz, J., Kamineni, S., Liu, N. X., Magyar, A., and Calhoun, B. H., A 6–140-nW 11 Hz–8.2-kHz DVFS RISC-V Microprocessor Using Scalable Dynamic Leakage-Suppression Logic, IEEE Solid-State Circuits Letters (SSCL), 2019.PDF icon A 6–140-nW 11 Hz–8.2-kHz DVFS RISC-V Microprocessor Using Scalable Dynamic Leakage-Suppression Logic (1.63 MB)
X. Chen, Breiholz, J., Yahya, F. B., Lukas, C. J., Kim, H. - S., Calhoun, B. H., and Wentzloff, D. D., Analysis and Design of an Ultra-Low-Power Bluetooth Low-Energy Transmitter With Ring Oscillator-Based ADPLL and 4 Frequency Edge Combiner, IEEE Journal of Solid-State Circuits, 2019.
M. A. Hanson, Jr, H. C. Powell, Barth, A. T., Ringgenberg, K., Calhoun, B. H., Aylor, J. H., and Lach, J., Body Area Sensor Networks: Challenges and Opportunities, Computer, vol. 42, pp. 58–65, 2009.
B. H. Calhoun, Lach, J., Stankovic, J., Wentzloff, D. D., Whitehouse, K., Barth, A., Brown, J. K., Li, Q., Oh, S., Roberts, N., and Zhang, Y., Body Sensor Networks: A Holistic Approach From Silicon to Users, IEEE Proceedings, 2011.
B. H. Calhoun, Lach, J., Stankovic, J., Wentzloff, D. D., Whitehouse, K., Barth, A., Brown, J. K., Li, Q., Oh, S., Roberts, N., and Zhang, Y., Body Sensor Networks: A Holistic Approach From Silicon to Users, IEEE Proceedings, 2011.
E. Shih, Cho, S. - H., Lee, F. S., Calhoun, B. H., and Chandrakasan, A., Design Considerations for Energy-Efficient Radios in Wireless Microsensor Networks, Journal of VLSI Signal Processing, vol. 37, pp. 77-94, 2004.

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