A wide load and voltage range switched-capacitor DC-DC converter with load-dependent configurability for DVS implementation in miniature sensors. - Hassan Saif; Yongmin Lee; Minsun Kim; Hyeonji Lee; Muhammad Bilawal Khan; Yoonmyung Lee (A-SSCC, 2017)

A Sub-nW Fully Integrated Switched-Capacitor Energy Harvester for Implantable Applications. - Hyeonji Lee; Eunsang Jang; Hassan Saif; Yongmin Lee; Minsun Kim; Muhammad Bilawal Khan; Yoonmyung Lee (ESSCIRC, 2018)

A Piezoelectric Energy Harvesting Interface for Irregular High Voltage Input with Partial Electric Charge Extraction with 3.9× Extraction Improvement. - Muhammad Bilawal Khan; Hassan Saif; Yoonmyung Lee (A-SSCC, 2019)

A 17V-to-45V Input 25 μW-to-10mW Output Power, 90.2%-Peak-Efficiency SC DC-DC Converter with Recursive Output Connection for High-Voltage Energy Harvesting. - Hassan Saif; Muhammad Bilawal Khan; Yoonmyung Lee (CICC, 2019)

A High-Voltage Energy-Harvesting Interface for Irregular Kinetic Energy Harvesting in IoT Systems with 1365% Improvement Using All-NMOS Power Switches and Ultra-low Quiescent Current Controller. - Hassan Saif; Muhammad Bilawal Khan; Jongmin Lee 001; Kyoungho Lee; Yoonmyung Lee (Sensors, 2019)

Dual Piezoelectric Energy Investing and Harvesting Interface for High-Voltage Input. - Muhammad Bilawal Khan; Hassan Saif; Kyoungho Lee; Yoonmyung Lee (Sensors, 2021)

A Harvesting Circuit for Flexible Thin-Film Piezoelectric Generator Achieving 562% Energy Extraction Improvement With Load Screening. - Muhammad Bilawal Khan; Dong Hyun Kim; Jae Hyun Han; Hassan Saif; Hyeonji Lee; Yongmin Lee; Minsun Kim; Eunsang Jang; Daniel Juhyung Joe; Keon Jae Lee; Yoonmyung Lee (IEEE Trans. Ind. Electron., 2021)