A CMOS 868/915 MHz direct conversion. ZigBee single-chip radio. - Nam-Jin Oh; Sang-Gug Lee 001; Jinho Ko (IEEE Commun. Mag., 2005)

A low-noise mixer with an image-reject notch filter for 2.4 GHz applications. - Nam-Jin Oh (Microelectron. J., 2008)

A low-power, low phase noise CMOS VCO with suppression of 1/f flicker noise up-conversion. - Nam-Jin Oh; Deuk Heo (IEICE Electron. Express, 2012)

A low phase-noise CMOS voltage-controlled oscillator with a series LC resonator. - Nam-Jin Oh (ICEIC, 2014)

High performance differential Colpitts VCO with a linearized tuning range using a series resonator. - Nam-Jin Oh (IEICE Electron. Express, 2014)

A phase-noise reduction technique for RF CMOS voltage-controlled oscillator with a series LC resonator. - Nam-Jin Oh (Microelectron. J., 2014)

Colpitts-based Folded Self-oscillating Mixer. - Nam-Jin Oh (ICEIC, 2025)