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  • Huy-Binh Le, Seung-Tak Ryu, Sang-Gug Lee, “A Fully On-chip Gm-Opamp-RC Based Preamplifier for Electret Condenser Microphones", IEICE Transaction, Electron,VOL E92-C. No.4, Apr. 2009.
  • Jong-Phil Hong and Sang-Gug Lee, "Low Phase Noise Gm-Boosted Differential Gate-to-Source Feedback Colpitts CMOS VCO" IEEE Journal of Solid-State Circuits, Vol.44, No.11, pp.3079-3091, Nov, 2009.
  • Viet Hoang Le, Seok-Kyun Han, Jeong-Seon Lee, and Sang-Gug Lee “Current-Reused Ultra Low Power, Low Noise LNA+Mixer" IEEE Microwave and Wireless Components Letters, Vol.19, No.11, 2009.
  • Huy-Hieu Nguyen, Hoai-Nam Nguyen, Jeong-Seon Lee, and Sang-Gug Lee "A Binary-Weighted Switching and Reconfiguration-Based Programmable Gain Amplifier", IEEE Transactions on Cirucuits and Systems Part II, Vo1.56, No.9, 2009.
  • Y.S.Jang, J.S.Lee, S.G.Lee and J.H.Ko;, “Complex DC-offset cancellation circuit" IEEE Electronics Letters, vol. 45, No.13, 18th June. 2009.
  • In-Young Lee, Seok-Ju Yun, Seung-Min Oh, and Sang-Gug Lee, “A Low-Parasitic and Common-Centroid Cross-Coupled CMOS Transistor Structure for High-Frequency VCO Design,” IEEE Electron Device Letters, Vol. 30, No. 5, pp. 532-534, May. 2009.
  • H.B.Le, J.W.Nam, S.T.Ryu, and S.G.Lee “Single-chip A/D converter for digital microphones with on-chip preamplifier and time-domain noise isolation" Electronics Letters, vol.45, No.3, pp.151-153, Jan. 2009.
  • Huy-Binh Le, and Sang-Gug Lee "A 1-V low power gain boosted self-cascoding current mirror operational transconductance amplifier", International Journal of Electronics, 1362-3060, Vol.96, No.10, pp.1005-1009, 2009.
  • Anh Tuan Phan, Ronan Farrell, and Sang-Gug Lee,"A 12-mW 264-MHz High linearity Sharp Roll-off CMOS Opamp-RC Low Pass Filter for MB-OFDM UWB System", Analog Integrated Circuits and Signal Processing, Springer, Dec.28th, 2009.