Protection Circuits for Very High Frequency Ultrasound Systems. - Hojong Choi; K. Kirk Shung (J. Medical Syst., 2014)

Parallel dynamic subcarrier and time allocation protocol for long-reach OFDMA-PONs. - Wansu Lim; Pandelis Kourtessis; Milos Milosavljevic; John M. Senior; Hojong Choi (ICC, 2015)

A Novel Fisheye-Lens-Based Photoacoustic System. - Hojong Choi; Jaemyung Ryu; Jungsuk Kim (Sensors, 2016)

Bias-Voltage Stabilizer for HVHF Amplifiers in VHF Pulse-Echo Measurement Systems. - Hojong Choi; Chulwoo Park; Jungsuk Kim; Hayong Jung (Sensors, 2017)

Development of a Double-Gauss Lens Based Setup for Optoacoustic Applications. - Hojong Choi; Jaemyung Ryu; Jung-Yeol Yeom (Sensors, 2017)

Power MOSFET Linearizer of a High-Voltage Power Amplifier for High-Frequency Pulse-Echo Instrumentation. - Hojong Choi; Park Chul Woo; Jung-Yeol Yeom; Changhan Yoon (Sensors, 2017)

Suppression Technique of HeLa Cell Proliferation Using Ultrasonic Power Amplifiers Integrated with a Series-Diode Linearizer. - Se-woon Choe; Hojong Choi (Sensors, 2018)

Therapeutic Effect Enhancement by Dual-Bias High-Voltage Circuit of Transmit Amplifier for Immersion Ultrasound Transducer Applications. - Hojong Choi; Se-woon Choe (Sensors, 2018)

Development of a Multiwavelength Visible-Range-Supported Opto-Ultrasound Instrument Using a Light-Emitting Diode and Ultrasound Transducer. - Hojong Choi; Jung-Yeol Yeom; Jaemyung Ryu (Sensors, 2018)

Image Formation Technique Using Advanced Matrix Pattern in Fourier Transform for Medical Ultrasound Machine. - Seunghyeok Shin; Hojong Choi (J. Medical Imaging Health Informatics, 2019)

Prelinearized Class-B Power Amplifier for Piezoelectric Transducers and Portable Ultrasound Systems. - Hojong Choi (Sensors, 2019)

Class-C Linearized Amplifier for Portable Ultrasound Instruments. - Hojong Choi (Sensors, 2019)

Stacked Transistor Bias Circuit of Class-B Amplifier for Portable Ultrasound Systems. - Hojong Choi (Sensors, 2019)

Acoustic Stimulation by Shunt-Diode Pre-Linearizer Using Very High Frequency Piezoelectric Transducer for Cancer Therapeutics. - Hojong Choi; Se-woon Choe (Sensors, 2019)

A Macro Lens-Based Optical System Design for Phototherapeutic Instrumentation. - Hojong Choi; Se-woon Choe; Jaemyung Ryu (Sensors, 2019)

A CMOS Image Sensor with a Novel Passive Pixel Array and High Precision Current Amplifier for a Compact Digital X-ray Detector. - Jimin Cheon; Dongmyung Lee; Hojong Choi (J. Medical Imaging Health Informatics, 2020)

Development of an Accurate Resonant Frequency Controlled Wire Ultrasound Surgical Instrument. - Jungsuk Kim; Kyeongjin Kim; Sun-Ho Choe; Hojong Choi (Sensors, 2020)

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)

Ambient Light Rejection Integrated Circuit for Autonomous Adaptation on a Sub-Retinal Prosthetic System. - Hosung Kang; Hojong Choi; Jungsuk Kim (Sensors, 2021)

Novel Bandwidth Expander Supported Power Amplifier for Wideband Ultrasound Transducer Devices. - Kyeongjin Kim; Hojong Choi (Sensors, 2021)

A New Approach to Power Efficiency Improvement of Ultrasonic Transmitters via a Dynamic Bias Technique. - Kyeongjin Kim; Hojong Choi (Sensors, 2021)

Printed Circuit Board Defect Detection Using Deep Learning via A Skip-Connected Convolutional Autoencoder. - Jungsuk Kim; Jungbeom Ko; Hojong Choi; Hyunchul Kim (Sensors, 2021)

Simultaneous Acquisition of Ultrasound and Gamma Signals with a Single-Channel Readout. - Muhammad Nasir Ullah; Yuseung Park; Gyeong Beom Kim; Chanho Kim; Chansun Park; Hojong Choi; Jung-Yeol Yeom (Sensors, 2021)

Hexagonal Stimulation Digital Controller Design and Verification for Wireless Subretinal Implant Device. - Wajahat H. Abbasi; Hojong Choi; Jungsuk Kim (Sensors, 2022)

Pre-Matching Circuit for High-Frequency Ultrasound Transducers. - Hojong Choi (Sensors, 2022)

A Novel Quick-Response Eigenface Analysis Scheme for Brain-Computer Interfaces. - Hojong Choi; Junghun Park; Yeon-Mo Yang (Sensors, 2022)

Whitening Technique Based on Gram-Schmidt Orthogonalization for Motor Imagery Classification of Brain-Computer Interface Applications. - Hojong Choi; Junghun Park; Yeon-Mo Yang (Sensors, 2022)

A Mathematically Generated Noise Technique for Ultrasound Systems. - Hojong Choi; Seunghyeok Shin (Sensors, 2022)

Low-Area Four-Channel Controlled Dielectric Breakdown System Design for Point-of-Care Applications. - Jonggi Hong; Yeonji Oh; Hojong Choi; Jungsuk Kim (Sensors, 2022)

Fully Customized Photoacoustic System Using Doubly Q-Switched Nd: YAG Laser and Multiple Axes Stages for Laboratory Applications. - Unsang Jung; Jin Hyuck Choi; Han Tae Choo; Gyu Ug Kim; Jaemyung Ryu; Hojong Choi (Sensors, 2022)

Harmonic-Reduced Bias Circuit for Ultrasound Transducers. - Hojong Choi (Sensors, 2023)

A Doherty Power Amplifier for Ultrasound Instrumentation. - Hojong Choi (Sensors, 2023)

An Inverse Class-E Power Amplifier for Ultrasound Transducer. - Hojong Choi (Sensors, 2023)

Design of Preamplifier for Ultrasound Transducers. - Hojong Choi (Sensors, 2024)