Post-Voltage-Boost Circuit-Supported Single-Ended Class-B Amplifier for Piezoelectric Transducer Applications. - Jungsuk Kim; Kiheum You; Hojong Choi (Sensors, 2020)

Wireless Ultrasound Surgical System with Enhanced Power and Amplitude Performances. - Jungsuk Kim; Kiheum You; Sun-Ho Choe; Hojong Choi (Sensors, 2020)

Wide Bandwidth Class-S Power Amplifiers for Ultrasonic Devices. - Kiheum You; Hojong Choi (Sensors, 2020)

Inter-Stage Output Voltage Amplitude Improvement Circuit Integrated with Class-B Transmit Voltage Amplifier for Mobile Ultrasound Machines. - Kiheum You; Hojong Choi (Sensors, 2020)

A Class-J Power Amplifier Implementation for Ultrasound Device Applications. - Kiheum You; Seung-Hwan Kim; Hojong Choi (Sensors, 2020)