Power-Combining Transformer Techniques for Fully-Integrated CMOS Power Amplifiers. - Kyu Hwan An; Ockgoo Lee; Hyungwook Kim; Dong Ho Lee; Jeonghu Han; Ki Seok Yang; Younsuk Kim; Jaejoon Chang; Wangmyong Woo; Chang-Ho Lee; Haksun Kim; Joy Laskar (IEEE J. Solid State Circuits, 2008)

Emerging multi-level architectures and unbalanced mismatch calibration technique for high-efficient and high-linear LINC systems. - Joy Laskar; Kyutae Lim; Joonhoi Hur; Kihyun W. Kim; Ockgoo Lee; Chang-Ho Lee (ISCAS, 2010)

A Charging Acceleration Technique for Highly Efficient Cascode Class-E CMOS Power Amplifiers. - Ockgoo Lee; Jeonghu Han; Kyu Hwan An; Dong Ho Lee; Kun-Seok Lee; Songcheol Hong; Chang-Ho Lee (IEEE J. Solid State Circuits, 2010)

Analysis and Design of Fully Integrated High-Power Parallel-Circuit Class-E CMOS Power Amplifiers. - Ockgoo Lee; Kyu Hwan An; Hyungwook Kim; Dong Ho Lee; Jeonghu Han; Ki Seok Yang; Chang-Ho Lee; Haksun Kim; Joy Laskar (IEEE Trans. Circuits Syst. I Regul. Pap., 2010)

An Amplitude and Phase Mismatches Calibration Technique for the LINC Transmitter With Unbalanced Phase Control. - Joonhoi Hur; Hyoungsoo Kim; Ockgoo Lee; Kwan-Woo Kim; Kyutae Lim; Franklin Bien (IEEE Trans. Veh. Technol., 2011)

A switchless reconfigurable transformer CMOS power amplifier. - Ockgoo Lee; Kyu Hwan An; Juphil Cho; Jaesang Cha (IEICE Electron. Express, 2012)

Optimization of CMOS power-cell layout for improving junction breakdown. - Ockgoo Lee; Jeonghu Han; Kyu Hwan An; Hyoungsoo Kim; Joonhui Hur; Kiseok Yang; Kyutae Lim; Chang-Ho Lee; Joy Laskar (IEICE Electron. Express, 2014)

A Multilevel Class-D CMOS Power Amplifier for an Out-Phasing Transmitter With a Nonisolated Power Combiner. - Joonhoi Hur; Hyoungsoo Kim; Ockgoo Lee; Kwan-Woo Kim; Franklin Bien; Kyutae Lim; Chang-Ho Lee; Joy Laskar (IEEE Trans. Circuits Syst. II Express Briefs, 2016)

WLAN transceiver for 802.11 a/b/g/n/ac with integrated power amplifier and harmonic LO frequency VCO. - Minsu Jeong; Ockgoo Lee; Soo-Won Kim (ISOCC, 2017)

A TV Receiver Front-End With Linearized LNA and Current-Summing Harmonic Rejection Mixer. - Donggu Im; Ockgoo Lee; Ilku Nam (IEEE Trans. Circuits Syst. II Express Briefs, 2017)

An External Capacitor-Less Ultralow-Dropout Regulator Using a Loop-Gain Stabilizing Technique for High Power-Supply Rejection Over a Wide Range of Load Current. - Younghyun Lim; Jeonghyun Lee; Yongsun Lee; Seong-Sik Song; Hong-Teuk Kim; Ockgoo Lee; Jaehyouk Choi (IEEE Trans. Very Large Scale Integr. Syst., 2017)

A 5.5-GHz CMOS power amplifier using parallel-combined transistors with cascode adaptive biasing for WLAN applications. - Seungjun Baek; Hyunjin Ahn; Ilku Nam; Joonhoi Hur; Youngchang Yoon; Ockgoo Lee (IEICE Electron. Express, 2018)

Fully Integrated CMOS PAs with Two-Winding and Single-Winding Combined Transformer for WLAN Applications. - Se-Eun Choi; Hyunjin Ahn; Hyunsik Ryu; Ilku Nam; Ockgoo Lee (IEICE Trans. Electron., 2018)

Highly Efficient HBT Power Amplifier Using High-Q Single- and Two-Winding Transformer With IMD3 Cancellation. - Hyunjin Ahn; Kyutaek Oh; Ilku Nam; Ockgoo Lee (IEEE Access, 2021)

A Highly Efficient and Linear mm-Wave CMOS Power Amplifier Using a Compact Symmetrical Parallel-Parallel Power Combiner With IMD3 Cancellation for 5G Applications. - Hyunjin Ahn; Kyutaek Oh; Ilku Nam; Ockgoo Lee (IEEE Access, 2021)

A 24-to-44 GHz Compact Linear 5G Power Amplifier with Open-Terminated Balun in 65nm Bulk CMOS. - Kyutaek Oh; Hyunjin Ahn; Ilku Nam; Ockgoo Lee (ESSCIRC, 2022)

28-GHz CMOS Up-Conversion Mixer With Improved LO Second-Harmonic Leakage Signal Suppression for 5G Applications. - Suyeon Lee; Yangji Jeon; Dae-Young Yoon; Ockgoo Lee; Donggu Im; Ilku Nam (IEEE Access, 2022)

A Frequency Synthesizer With Automatic Frequency Calibration Robust to Initial Phase Error and Phase-Noise Enhanced Ring Oscillator. - Geonwoo Park; Ockgoo Lee; Donggu Im; Ilku Nam (IEEE Trans. Circuits Syst. II Express Briefs, 2025)