In Hee Lee

  • Ph.D., University of Michigan, 2009 - 2014
  • M.S., Yonsei University, 2005 - 2007
  • B.S., Yonsei University, 2000 - 2005

  • Lee, S.R., Hyun, M.C., Lee, I., & Kim, J.S. (2026). A Stability-Enhanced Feedback-Based Readout Circuit for Active-Matrix Resistive Sensor Arrays. IEEE Sensors Journal, 26(4), 6097-6109.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/jsen.2025.3644343.
  • Shim, M., Hamed, E.A., Li, Y., Seok, W., Jeong, S., Kim, Y., Jung, W., & Lee, I. (2026). Low-Power Power Management Unit With Adaptive Dynamic Load Power Tracking for Millimeter-Scale Computing Systems. IEEE TRANSACTIONS ON POWER ELECTRONICS, 41(1), 163-168.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TPEL.2025.3604695.
  • Choi, W., Lee, I., Ji, Y., Delke, A., Pan, S., Tang, Z., & Chae, Y. (2025). Recent Advances in Energy-Efficient and Temperature-Resilient Sensor Interfaces. IEEE OPEN JOURNAL OF THE SOLID-STATE CIRCUITS SOCIETY, 5, 456-469.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/OJSSCS.2025.3634970.
  • Eum, H., Makinwa, K.A.A., Lee, I., & Chae, Y. (2025). A Sub-1-V Capacitively-Biased Voltage Reference With an Auto-Zeroed Buffer and a TC of 18-ppm/°C. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 72(1), 8-12.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TCSII.2024.3454348.
  • Hamed, E.A., Carichner, G., Green, D.A., Kim, H.S., & Lee, I. (2025). Hybrid Timestamping Using Crystal and RC Oscillators for Shock-Resistant Precision. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, 33(7), 2004-2008.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TVLSI.2025.3544410.
  • Hamed, E.A., Muloor, S., & Lee, I. (2025). Low-Power Digital Temperature Compensation Technique for XO Wake-Up Timers. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, 33(12), 3216-3227.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TVLSI.2025.3603174.
  • Ji, Y., Li, Y., & Lee, I. (2025). Low-Power Subthreshold Voltage References for High-Temperature Applications. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 72(6), 2529-2542.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TCSI.2025.3554367.
  • Lee, I., & Nadeau, P. (2025). Special Section on Energy-Efficient Biomedical Systems and Circuits. IEEE OPEN JOURNAL OF THE SOLID-STATE CIRCUITS SOCIETY, 5, 322-323.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/OJSSCS.2025.3648687.
  • Li, Y., Caginalp, R., & Lee, I. (2025). A Picowatt CMOS Voltage Reference Using Independent TC and Output Level Calibrations. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, 33(5), 1244-1254.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TVLSI.2024.3508259.
  • Lee, H., Seo, D., Woo, Y.J., Lee, Y., Lee, I., & Chae, Y. (2024). A 23.9-μ W 13.6-Bit Period Modulation-Based Capacitance-to-Digital Converter With Dynamic Current Mirror Front-End. IEEE SOLID-STATE CIRCUITS LETTERS, 7, 135-138.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/LSSC.2024.3382813.
  • Li, Y., Vivekanand, V.S., Kubendran, R., & Lee, I. (2024). Dynamic Neural Fields Accelerator Design for a Millimeter-Scale Tracking System. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, 32(10), 1940-1944.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TVLSI.2024.3416725.
  • Li, Y., Kim, Y., & Lee, I. (2023). A 5-mm2, 4.7-μW Convolutional Neural Network Layer Accelerator for Miniature Systems. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, 31(12), 2142-2146.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TVLSI.2023.3324572.
  • Seo, D., Cho, M., Jeong, M., Shin, G., Lee, I., Blaauw, D., & Lee, Y. (2023). An RC Delay-Based Pressure-Sensing System With Energy-Efficient Bit-Level Oversampling Techniques for Implantable IOP Monitoring Systems. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 58(10), 2745-2756.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2023.3286796.
  • Lee, H., Lee, C., Lee, I., & Chae, Y. (2022). A 0.033-mm2 21.5-aF to 114.9-aF Resolution Continuous-Time ΔΣ Capacitance-to-Digital Converter Achieving Parasitic Capacitance Immunity Up to 480 pF. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 57(10), 3048-3057.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2022.3184531.
  • Li, Y., Wu, Y., Zhang, X., Hu, J., & Lee, I. (2022). Energy-Aware Adaptive Multi-Exit Neural Network Inference Implementation for a Millimeter-Scale Sensing System. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, 30(7), 849-859.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TVLSI.2022.3171308.
  • Hamed, E.A., & Lee, I. (2021). Categorization and SEU Fault Simulations of Radiation-Hardened-by-Design Flip-Flops. ELECTRONICS, 10(13).MDPI. doi: 10.3390/electronics10131572.
  • Hamed, E.A., Athas, J., Zhang, X., Ashenden, N., & Lee, I. (2021). A Low-Power GPIO-Based Size Sensor to Monitor the Imbibition of Corn Seeds Beneath Soil. ELECTRONICS, 10(19).MDPI. doi: 10.3390/electronics10192423.
  • Li, Y., Gao, Y., Shao, M., Tonecha, J.T., Wu, Y., Hu, J., & Lee, I. (2021). Implementation of Multi-Exit Neural-Network Inferences for an Image-Based Sensing System with Energy Harvesting. JOURNAL OF LOW POWER ELECTRONICS AND APPLICATIONS, 11(3).MDPI. doi: 10.3390/jlpea11030034.
  • Bollella, P., Lee, I., Blaauw, D., & Katz, E. (2020). A Microelectronic Sensor Device Powered by a Small Implantable Biofuel Cell. Chemphyschem, 21(1), 120-128.Wiley. doi: 10.1002/cphc.201900700.
  • Li, Y., Hamed, E.A., Zhang, X., Luna, D., Lin, J.S., Liang, X., & Lee, I. (2020). Feasibility of Harvesting Solar Energy for Self-Powered Environmental Wireless Sensor Nodes. ELECTRONICS, 9(12).MDPI. doi: 10.3390/electronics9122058.
  • Moon, E., Lee, I., Blaauw, D., & Phillips, J.D. (2019). High-Efficiency Photovoltaic Modules on a Chip for Millimeter-Scale Energy Harvesting. Prog Photovolt, 27(6), 540-546.Wiley. doi: 10.1002/pip.3132.
  • Peng, Y., Choo, K.D., Oh, S., Lee, I., Jang, T., Kim, Y., Lim, J., Blaauw, D., & Sylvester, D. (2019). An Efficient Piezoelectric Energy Harvesting Interface Circuit Using a Sense-and-Set Rectifier. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 54(12), 3348-3361.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2019.2945262.
  • Gamella, M., Lee, I., Guz, N., Blaauw, D., & Katz, E. (2018). Bioelectronic Interface between Biomolecular Logic Systems and Microelectronics. INTERNATIONAL JOURNAL OF UNCONVENTIONAL COMPUTING, 14(1), 27-41.
  • Choi, M., Sui, Y., Lee, I., Meredith, R., Ma, Y., Kim, G., Blaauw, D., Gianchandani, Y., & Li, T. (2017). Autonomous Microsystems for Downhole Applications: Design Challenges, Current State, and Initial Test Results. Sensors, 17(10), 2190.MDPI AG. doi: 10.3390/s17102190.
  • Lee, I., & Lee, Y. (2017). Circuit Design in mm-Scale Sensor Platform for Future IoT Applications. In Smart Sensors and Systems. (pp. 57-81).Springer Nature. doi: 10.1007/978-3-319-33201-7_3.
  • Lee, I., Bang, S., Kim, Y., Kim, G., Sylvester, D., Blaauw, D., & Lee, Y. (2017). A Wire-overhead-free Reset Propagation Scheme for Millimeter-scale Sensor Systems. JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, 17(4), 524-533.The Institute of Electronics Engineers of Korea. doi: 10.5573/JSTS.2017.17.4.524.
  • Lee, I., Sylvester, D., & Blaauw, D. (2017). A Subthreshold Voltage Reference With Scalable Output Voltage for Low-Power IoT Systems. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 52(5), 1443-1449.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2017.2654326.
  • Wu, X., Shi, Y., Jeloka, S., Yang, K., Lee, I., Lee, Y., Sylvester, D., & Blaauw, D. (2017). A 20-pW Discontinuous Switched-Capacitor Energy Harvester for Smart Sensor Applications. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 52(4), 972-984.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2016.2645741.
  • Lee, I., Kuo, Y.S., Pannuto, P., Kim, G., Foo, Z., Kempke, B., Jeong, S., Kim, Y., Dutta, P., Blaauw, D., & Lee, Y. (2016). MBus: A Fully Synthesizable Low-power Portable Interconnect Bus for Millimeter-scale Sensor Systems. JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, 16(6), 745-753.The Institute of Electronics Engineers of Korea. doi: 10.5573/JSTS.2016.16.6.745.
  • Lee, I., Lee, Y., Sylvester, D., & Blaauw, D. (2016). Battery Voltage Supervisors for Miniature IoT Systems. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 51(11), 2743-2756.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2016.2600565.
  • Lee, I., Sylvester, D., & Blaauw, D. (2016). A Constant Energy-Per-Cycle Ring Oscillator Over a Wide Frequency Range for Wireless Sensor Nodes. IEEE J Solid-State Circuits, 51(3), 697-711.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2016.2517133.
  • Teran, A.S., Moon, E., Lim, W., Kim, G., Lee, I., Blaauw, D., & Phillips, J.D. (2016). Energy Harvesting for GaAs Photovoltaics Under Low-Flux Indoor Lighting Conditions. IEEE Trans Electron Devices, 63(7), 2820-2825.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TED.2016.2569079.
  • Chen, Y.P., Jeon, D., Lee, Y., Kim, Y., Foo, Z., Lee, I., Langhals, N.B., Kruger, G., Oral, H., Berenfeld, O., Zhang, Z., Blaauw, D., & Sylvester, D. (2015). An Injectable 64 nW ECG Mixed-Signal SoC in 65 nm for Arrhythmia Monitoring. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 50(1), 375-390.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2014.2364036.
  • Jeong, S., Lee, I., Blaauw, D., & Sylvester, D. (2015). A 5.8 nW CMOS Wake-Up Timer for Ultra-Low-Power Wireless Applications. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 50(8), 1754-1763.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2015.2413133.
  • Lee, I., Han, G., & Chae, Y. (2015). A 2 mW, 50 dB DR, 10 MHz BW 5x Interleaved Bandpass Delta-Sigma Modulator at 50 MHz IF. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 62(1), 80-89.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TCSI.2014.2347234.
  • Lee, I., Kim, G., Bang, S., Wolfe, A., Bell, R., Jeong, S., Kim, Y., Kagan, J., Arias-Thode, M., Chadwick, B., Sylvester, D., Blaauw, D., & Lee, Y. (2015). System-On-Mud: Ultra-Low Power Oceanic Sensing Platform Powered by Small-Scale Benthic Microbial Fuel Cells. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 62(4), 1126-1135.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TCSI.2015.2390559.
  • Jeon, D., Henry, M.B., Kim, Y., Lee, I., Zhang, Z., Blaauw, D., & Sylvester, D. (2014). An Energy Efficient Full-Frame Feature Extraction Accelerator With Shift-Latch FIFO in 28 nm CMOS. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 49(5), 1271-1284.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2014.2309692.
  • Jeon, S.J., Oh, M., Yeo, W.S., Galvão, K.N., & Jeong, K.C. (2014). Underlying mechanism of antimicrobial activity of chitosan microparticles and implications for the treatment of infectious diseases. In Virolle, M.J. (Ed.). PLoS One, 9(3), e92723.Public Library of Science (PLoS). doi: 10.1371/journal.pone.0092723.
  • Lee, I.H. (2014). Power Management Circuits for Miniature Sensor Systems.
  • Foo, Z., Devescery, D., Ghaed, M.H., Lee, I., Madhavan, A., Park, Y.S., Rao, A.S., Renner, Z., Roberts, N.E., Schulman, A.D., Vinay, V.S., Wieckowski, M., Yoon, D., Schmidt, C., Schmid, T., Dutta, P., Chen, P.M., & Blaauw, D. (2013). A Low-Cost Audio Computer for Information Dissemination Among Illiterate People Groups. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 60(8), 2039-2050.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TCSI.2013.2264693.
  • Ghaed, M.H., Chen, G., Razi-ul, H., Wieckowski, M., Kim, Y., Kim, G., Lee, Y., Lee, I., Fick, D., Kim, D., Seok, M., Wise, K.D., Blaauw, D., & Sylvester, D. (2013). Circuits for a Cubic-Millimeter Energy-Autonomous Wireless Intraocular Pressure Monitor. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 60(12), 3152-3162.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TCSI.2013.2265973.
  • Lee, Y., Bang, S., Lee, I., Kim, Y., Kim, G., Ghaed, M.H., Pannuto, P., Dutta, P., Sylvester, D., & Blaauw, D. (2013). A Modular 1 mm3 Die-Stacked Sensing Platform With Low Power I2C Inter-Die Communication and Multi-Modal Energy Harvesting. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 48(1), 229-243.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSSC.2012.2221233.
  • Cheon, J., Chae, Y., Kim, D., Lim, S., Lee, I., Lee, H.K., Kim, D.J., & Han, G. (2009). Smart CMOS Image Sensor With High SBR and Subpixel Resolution for Light-Section-Based Range Finding. IEEE TRANSACTIONS ON ELECTRON DEVICES, 56(11), 2546-2555.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/TED.2009.2030708.
  • Cheon, J., Lee, J., Lee, I., Chae, Y., Yoo, Y., & Han, G. (2009). A Single-Chip CMOS Smoke and Temperature Sensor for an Intelligent Fire Detector. IEEE SENSORS JOURNAL, 9(8), 914-921.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSEN.2009.2024703.

  • Shoouri, S., Yang, M., Carichner, G., Li, Y., Hamed, E.A., Deng, A., Green, D.A., Lee, I., Blaaw, D., & Kim, H.S. (2022). Siamese Learning-Basedmonarch Butterfly Localization. In 2022 IEEE Data Science and Learning Workshop (DSLW), 00, (pp. 1-7).Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/dslw53931.2022.9820497.
  • Yang, M., Hsiao, R., Carichner, G., Ernst, K., Lim, J., Green, D.A., Lee, I., Blaauw, D., & Kim, H.S. (2021). Migrating Monarch Butterfly Localization Using Multi-Modal Sensor Fusion Neural Networks. In 2020 28th European Signal Processing Conference (EUSIPCO), 00, (pp. 1792-1796).Institute of Electrical and Electronics Engineers (IEEE). doi: 10.23919/eusipco47968.2020.9287842.
  • Lim, J., Moon, E., Barrow, M., Nason, S.R., Patel, P.R., Patil, P.G., Oh, S., Lee, I., Kim, H.S., Sylvester, D., Blaauw, D., Chestek, C.A., Phillips, J., & Jang, T. (2020). A 0.19×0.17mm2 Wireless Neural Recording IC for Motor Prediction with Near-Infrared-Based Power and Data Telemetry. In Dig Tech Pap IEEE Int Solid State Circuits Conf, 2020, (pp. 416-418).Institute of Electrical and Electronics Engineers (IEEE).United States. doi: 10.1109/isscc19947.2020.9063005.
  • Kang, T., Lee, I., Oh, S., Jang, T., Kim, Y., Ahn, H., Kim, G., Shin, S.U., Jeong, S., Sylvester, D., & Blaauw, D. (2019). A 1.74.12 mm3 Fully Integrated pH Sensor for Implantable Applications using Differential Sensing and Drift-Compensation. In 2019 Symposium on VLSI Circuits, 00, (pp. c310-c311).Institute of Electrical and Electronics Engineers (IEEE).Kyoto, Japan. doi: 10.23919/vlsic.2019.8778184.
  • Lee, I., & Blaauw, D. (2019). A 31 pW-to-113 nW Hybrid BJT and CMOS Voltage Reference with 3.6% ±3σ-inaccuracy from 0○C to 170 ○C for Low-Power High-Temperature IoT Systems. In 2019 Symposium on VLSI Circuits, 00, (pp. c142-c143).Institute of Electrical and Electronics Engineers (IEEE).Kyoto, Japan. doi: 10.23919/vlsic.2019.8778113.
  • Lee, I., Moon, E., Kim, Y., Phillips, J., & Blaauw, D. (2019). A 10mm3 Light-Dose Sensing IoT2 System With 35-To-339nW 10-To-300klx Light-Dose-To-Digital Converter. In 2019 Symposium on VLSI Circuits, 00, (pp. c180-c181).Institute of Electrical and Electronics Engineers (IEEE).Kyoto, Japan. doi: 10.23919/vlsic.2019.8778007.
  • Lee, I., Moon, E., Kim, Y., Phillips, J., & Blaauw, D. (2019). A 10mm3Light-Dose Sensing IoT2 System with 35-to-339nW 10-to-300klx Light-Dose-to-Digital Converter. In 2019 Symposium on VLSI Technology, 00, (pp. c180-c181).Institute of Electrical and Electronics Engineers (IEEE). doi: 10.23919/vlsit.2019.8776556.
  • Peng, Y., Choo, D.K., Oh, S., Lee, I., Jang, T., Kim, Y., Lim, J., Blaauw, D., & Sylvester, D. (2019). 27.2 An Adiabatic Sense and Set Rectifier for Improved Maximum-Power-Point Tracking in Piezoelectric Harvesting with 541% Energy Extraction Gain. In 2019 IEEE International Solid- State Circuits Conference - (ISSCC), 00, (pp. 422-424).Institute of Electrical and Electronics Engineers (IEEE).San Francisco, CA. doi: 10.1109/isscc.2019.8662341.
  • Lee, I., Kim, G., Moon, E., Jeong, S., Kim, D., Phillips, J., & Blaauw, D. (2018). A 179-Lux Energy-Autonomous Fully-Encapsulated 17-mm3 Sensor Node with Initial Charge Delay Circuit for Battery Protection. In 2018 IEEE Symposium on VLSI Circuits, 00, (pp. 251-252).Institute of Electrical and Electronics Engineers (IEEE).Honolulu, HI. doi: 10.1109/vlsic.2018.8502287.
  • Wu, X., Lee, I., Dong, Q., Yang, K., Kim, D., Wang, J., Peng, Y., Zhang, Y., Saliganc, M., Yasuda, M., Kumeno, K., Ohno, F., Miyoshi, S., Kawaminami, M., Sylvester, D., & Blaauw, D. (2018). A 0.04MM316NW Wireless and Batteryless Sensor System with Integrated Cortex-M0+ Processor and Optical Communication for Cellular Temperature Measurement. In 2018 IEEE Symposium on VLSI Circuits, 00, (pp. 191-192).Institute of Electrical and Electronics Engineers (IEEE).Honolulu, HI. doi: 10.1109/vlsic.2018.8502391.
  • Cho, M., Oh, S., Jeong, S., Zhang, Y., Lee, I., Kim, Y., Chuo, L.X., Kim, D., Dong, Q., Chen, Y.P., Lim, M., Daneman, M., Blaauw, D., Sylvester, D., & Hun-SeokKim. (2017). A 6×5×4mm3 General Purpose Audio Sensor Node with a 4.7µW Audio Processing IC. In 2017 Symposium on VLSI Circuits, (pp. 312-313).Institute of Electrical and Electronics Engineers (IEEE).Kyoto, Japan. doi: 10.23919/vlsic.2017.8008521.
  • Dong, Q., Kim, Y., Lee, I., Choi, M., Li, Z., Wang, J., Yang, K., Chen, Y.P., Dong, J., Cho, M., Kim, G., Chang, W.K., Chen, Y.S., Chih, Y.D., Blaauw, D., & Sylvester, D. (2017). 11.2 A 1Mb Embedded Nor Flash Memory with 39µW Program Power for Mm-Scale High-Temperature Sensor Nodes. In 2017 IEEE International Solid-State Circuits Conference (ISSCC), 60, (pp. 198-200).Institute of Electrical and Electronics Engineers (IEEE).San Francisco, CA. doi: 10.1109/isscc.2017.7870329.
  • Dong, Q., Lee, I., Yang, K., Blaauw, D., & Sylvester, D. (2017). A 1.02nW PMOS-Only, Trim-Free Current Reference with 282ppm/°C from −40°C to 120°C and 1.6% within-Wafer Inaccuracy. In ESSCIRC 2017 - 43rd IEEE European Solid State Circuits Conference, (pp. 19-22).Institute of Electrical and Electronics Engineers (IEEE).Leuven, Belgium. doi: 10.1109/esscirc.2017.8094515.
  • Lee, I., Sylvester, D., & Blaauw, D. (2017). Subthreshold Voltage Reference with Nwell/Psub Diode Leakage Compensation for Low-Power High- Temperature Systems. In 2017 IEEE Asian Solid-State Circuits Conference (A-SSCC), 2017-January, (pp. 265-268).Institute of Electrical and Electronics Engineers (IEEE).Seoul, South Korea. doi: 10.1109/asscc.2017.8240267.
  • Jang, T., Choi, M., Shi, Y., Lee, I., Sylvester, D., & Blaauw, D. (2016). Millimeter-Scale Computing Platform for Next Generation of Internet of Things. In 2016 IEEE International Conference on RFID (RFID), (pp. 1-4).Institute of Electrical and Electronics Engineers (IEEE).Orlando, FL. doi: 10.1109/rfid.2016.7487997.
  • Lee, I., Lim, W., Teran, A., Phillips, J., Sylvester, D., & Blaauw, D. (2016). A >78%-Efficient Light Harvester over 100-to-100klux with Reconfigurable PV-Cell Network and MPPT Circuit. In Dig Tech Pap IEEE Int Solid State Circuits Conf, 2016, (pp. 370-371).Institute of Electrical and Electronics Engineers (IEEE).United States. doi: 10.1109/ISSCC.2016.7418061.
  • Lim, W., Jang, T., Lee, I., Kim, H.S., Sylvester, D., & Blaauw, D. (2016). A 380pW Dual Mode Optical Wake-up Receiver with Ambient Noise Cancellation. In Symp VLSI Circuits, 2016, (pp. 1-2).Institute of Electrical and Electronics Engineers (IEEE).United States. doi: 10.1109/VLSIC.2016.7573481.
  • Wu, X., Shi, Y., Jeloka, S., Yang, K., Lee, I., Sylvester, D., & Blaauw, D. (2016). A 66pW Discontinuous Switch-Capacitor Energy Harvester for Self-Sustaining Sensor Applications. In Symp VLSI Circuits, 2016, (pp. 1-2).Institute of Electrical and Electronics Engineers (IEEE).United States. doi: 10.1109/VLSIC.2016.7573490.
  • Bang, S., Seo, J.S., Lee, I., Jeong, S., Pinckney, N., Blaauw, D., Sylvester, D., & Chang, L. (2015). A fully-integrated 40-phase flying-capacitance-dithered switched-capacitor voltage regulator with 6mV output ripple. In 2010 Symposium on VLSI Circuits, 2015-August, (pp. c336-c337).Institute of Electrical and Electronics Engineers (IEEE).Kyoto, Japan. doi: 10.1109/vlsic.2015.7231313.
  • Lee, I., Jung, W., Ha, H., Jeong, S., Kim, Y., Kim, G., Foo, Z., Sim, J.Y., Sylvester, D., & Blaauw, D. (2015). An Ultra-Low-Power Biomedical Chip for Injectable Pressure Monitor. In 2015 IEEE Biomedical Circuits and Systems Conference (BioCAS), (pp. 1-4).Institute of Electrical and Electronics Engineers (IEEE).Atlanta, GA. doi: 10.1109/biocas.2015.7348313.
  • Lim, W., Lee, I., Sylvester, D., & Blaauw, D. (2015). Batteryless Sub-nW Cortex-MO+ Processor with Dynamic Leakage-Suppression Logic. In 2015 IEEE International Solid-State Circuits Conference - (ISSCC) Digest of Technical Papers, 58, (pp. 1-3).Institute of Electrical and Electronics Engineers (IEEE).IEEE. doi: 10.1109/isscc.2015.7062968.
  • Blaauw, D., Sylvester, D., Dutta, P., Lee, Y., Lee, I., Bang, S., Kim, Y., Kim, G., Pannuto, P., Kuo, Y.S., Yoon, D., Jung, W., Foo, Z., Chen, Y.P., Oh, S., Jeong, S., & Choi, M. (2014). IoT Design Space Challenges: Circuits and Systems. In 2014 Symposium on VLSI Technology (VLSI-Technology): Digest of Technical Papers, (pp. 1-2).Institute of Electrical and Electronics Engineers (IEEE).Honolulu, H. doi: 10.1109/vlsit.2014.6894411.
  • Choi, M., Lee, I., Jang, T.K., Blaauw, D., & Sylvester, D. (2014). A 23pW, 780ppm/°C Resistor-less Current Reference using Subthreshold MOSFETs. In ESSCIRC 2014 - 40th European Solid State Circuits Conference (ESSCIRC), (pp. 119-122).Institute of Electrical and Electronics Engineers (IEEE).Venice Lido, Italy. doi: 10.1109/esscirc.2014.6942036.
  • Jeong, S., Lee, I., Blaauw, D., & Sylvester, D. (2014). A 5.8nW, 45ppm/°C On-Chip CMOS Wake-up Timer Using a Constant Charge Subtraction Scheme. In Proc Cust Integr Circuits Conf, 2014, (pp. 1-4).Institute of Electrical and Electronics Engineers (IEEE).United States. doi: 10.1109/CICC.2014.6946008.
  • Kim, G., Lee, Y., Foo, Z., Pannuto, P., Kuo, Y.S., Kempke, B., Ghaed, M.H., Bang, S., Lee, I., Kim, Y., Jeong, S., Dutta, P., Sylvester, D., & Blaauw, D. (2014). A millimeter-scale wireless imaging system with continuous motion detection and energy harvesting. In 2014 Symposium on VLSI Circuits Digest of Technical Papers, (pp. 1-2).Institute of Electrical and Electronics Engineers (IEEE).Honolulu, HI. doi: 10.1109/vlsic.2014.6858425.
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  • Bang, S., Lee, Y., Lee, I., Kim, Y., Kim, G., Blaauw, D., & Sylvester, D. (2013). A fully integrated switched-capacitor based PMU with adaptive energy harvesting technique for ultra-low power sensing applications. In 2005 IEEE International Symposium on Circuits and Systems (ISCAS), (pp. 709-712).Institute of Electrical and Electronics Engineers (IEEE).International Symposium on Circuits and Systems (ISCAS). doi: 10.1109/iscas.2013.6571945.
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  • Jeon, D., Kim, Y., Lee, I., Zhang, Z., Blaauw, D., & Sylvester, D. (2013). A LOW-POWER VGA FULL-FRAME FEATURE EXTRACTION PROCESSOR. In 2013 IEEE International Conference on Acoustics, Speech and Signal Processing, (pp. 2726-2730).Institute of Electrical and Electronics Engineers (IEEE).Vancouver, BC, Canada. doi: 10.1109/icassp.2013.6638152.
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  • Blaauw, D.T., Sylvester, D., Choi, M., Lee, I., & Jang, T. (2017). Ultra low power temperature insensitive current source with line and load regulation.
  • Lee, I.H., Lee, Y., Sylvester, D.M., & Blaauw, D.T. (2016). Electronic device with supervisor circuit for detecting resistance parameter of an energy storage device.
  • Han, G., Chae, Y., Lee, I., Lee, D., Lim, S., & Cheon, J.M. (2014). Switched capacitor circuit.
  • Chae, Y., Lee, I.H., Cheon, J., Han, G., & Ham, S.H. (2012). Decimation filters, analog-to-digital converters including the same, and image sensors including the converters.
  • Chae, Y., Lee, I.H., Cheon, J., Han, G., & Ham, S.H. (2011). Apparatus and method for sigma-delta analog to digital conversion.
  • Chae, Y., Lee, I.H., Han, G., & Ham, S.H. (2010). Sigma-delta analog-to-digital converter and solid-state image pickup device.
Research Interests
Electronics, sensors and digital hardware Electrical engineering Data management and data science Distributed computing and systems software Human-centred computing Architecture