[45] Jong-Won Park, Deok-Young Kim, and Donggu Im, “A Broadband Gm-boosted Active Feedback CMOS Low Noise Amplifier for Low- and Mid-band 5G Applications,” in IEEE Transactions on Circuits and Systems II, accepted.
[44] Geonwoo Park, Ockgoo Lee, Donggu Im, and Ilku Nam, “A Frequency Synthesizer with Automatic Frequency Calibration Robust to Initial Phase Error and Phase-Noise Enhanced Ring Oscillator,” in IEEE Transactions on Circuits and Systems II, vol. 72, no. 1, pp. 43-47, Jan. 2025.
[43] Jeong-Ung Yoo, Jung-Mu Kim, Donggu Im, and Hae-Won Son, “Dual-Polarized Patch Antenna Array Integrated With Capacitive Proximity Sensor for 5G Millimeter-Wave Smartphones,” in IEEE Access, vol. 12, pp. 106770-106780, Aug. 2024.
[42] Dongmin Kim, Dongmyeong Kim, Ignacio Llamas-Garro, and Donggu Im, “A Sub-GHz/2.4 GHz Highly Selective Reconfigurable RF Front-End Employing an N-Path Complementary Balun-LNA and Linearized RF-to-BB Current-Reuse Mixer,” in IEEE Transactions on Circuits and Systems I, vol. 71, no. 1, pp. 147-159, Jan. 2024.
[41] Dongmyeong Kim, Haseon Song, Ilku Nam, and Donggu Im, “A Folded Cascode CMOS Low Noise Amplifier with Transformer Feedback,” in Journal of Electromagnetic Engineering and Science, vol. 24, no. 1, pp. 57-64, Jan. 2024.
[40] Gyeore Lee, Sein Oh, Kihyun Kim, and Donggu Im, “A Sub-GHz CMOS SPDT Antenna Switch Employing Linearity-Enhanced Biasing Strategy for Second-Order Harmonic Reduction,” in IEEE Transactions on Circuits and Systems II, vol. 70, no. 8, pp. 2774-2778, Aug. 2023.
[39] Dongmyeong Kim and Donggu Im, “A 2.4 GHz reconfigurable cascode/folded-cascode inductive source degenerated LNA with enhanced OP1dB and OIP3 over gain reduction,” in IEEE Transactions on Circuits and Systems II, vol. 70, no. 6, pp. 1831-1835, June 2023.
[38] In-Young Lee and Donggu Im, “Low Power RF Interface of the Near-field Communications Tag IC for Sensors,” in Journal of Semiconductor Technology and Science, vol. 23, no. 2, pp. 112-117, Apr. 2023.
[37] Seo-Hyeong Jeong, Dongmin Kim, In-Young Lee, and Donggu Im,“An analog baseband spectrum sensing circuit employing voltage follower based multi-order channel selection filters,” in IEEE Transactions on Circuits and Systems II, vol. 69, no. 12, pp. 4714-4718, Dec. 2022.
[36] Dongmin Kim and Donggu Im,“A reconfigurable balun-LNA and tunable filter with frequency-optimized harmonic rejection for sub-GHz and 2.4 GHz IoT receivers,” in IEEE Transactions on Circuits and Systems I, vol. 69, no. 8, pp. 3164-3176, Aug. 2022.
[35] Suyeon Lee, Yangji Jeon, Dae-Young Yoon, Ockgoo Lee, Donggu Im, and Ilku Nam,“28-GHz CMOS up-conversion mixer with improved LO second-harmonic leakage signal suppression for 5G applications,” in IEEE Access, vol. 10, pp. 57003-57011, June 2022.
[34] Dongmyeong Kim, Euibong Yang, and Donggu Im,“A concurrent dual-band CMOS partial feedback LNA with noise and input impedance matching optimization for advanced WLAN applications,” in Journal of Semiconductor Technology and Science, vol. 21, no. 5, pp. 356-363, Oct. 2021.
[33] Ilku Nam, Ockgoo Lee, and Donggu Im,“A wideband sub-GHz receiver front-end supporting high sensitivity and selectivity mode,” in Journal of Semiconductor Technology and Science, vol. 21, no. 4, pp. 263-269, Aug. 2021.
[32] Thi Thuy Pham, Dongmin Kim, Seo-Hyeong Jeong, Junghyup Lee, and Donggu Im,“A high efficiency low noise RF-to-DC converter employing gm-boosting envelope detector and offset canceled latch comparator,” in Electronics, vol. 10, no. 1078, pp. 1-12, May 2021.
[31] Dongmin Kim, Seunghyeok Jang, Junghyup Lee, and Donggu Im,“A broadband PVT-insensitive all-nMOS noise-canceling balun-LNA for subgigahertz wireless communication applications,” in IEEE Microwave and Wireless Components Letters, vol. 31, no. 2, pp. 165-168, Feb. 2021.
[30] Seongjin Bae, Dongmin Kim, Dongmyeong Kim, and Donggu Im,“A reconfigurable passive mixer-based sub-GHz receiver front-end for fast spectrum sensing functionality,” in IEEE Transactions on Circuits and Systems I, vol. 68, no. 2, pp. 892-903, Feb. 2021.
[29] Soonyoung Hong, Arup K. George, Donggu Im, Minkyu Je, and Junghyup Lee,“A 1.0 V, 5.4 pJ/bit GFSK demodulator based on an injection locked ring oscillator for low-IF receivers,” in IEEE Access, vol. 8, pp. 185209-185217, Oct. 2020.
[28] Taejong Kim, Donggu Im, and Kuduck Kwon,“360-uW 4.1-dB NF CMOS MedRadio receiver RF front-end with current-reuse Q-boosted resistive feedback LNA for biomedical IoT applications,” in International Journal of circuit Theory and Applications, vol. 48, no. 4, pp. 502-511, Apr. 2020.
[27] Dongmyeong Kim, Dongmin Kim, Hanggeun Jeong, and Donggu Im,“A reconfigurable CMOS inverter-based stacked power amplifier with antenna impedance mismatch compensation for low power short-range wireless communications,” in Electronics, vol. 9, no. 562, pp. 1-11, Apr. 2020.
[26] Sanggil Kim, and Donggu Im,“A digitally tunable small-area composite-varactor array operated with positive and negative control voltages for high linearity and low loss RF circuit applications,” in Solid-State Electronics, vol. 163, pp. 1-7, Jan. 2020.
[25] In-Young Lee, and Donggu Im,“Low phase-noise ring VCO employing input-coupled dynamic current source,” in IEEE Electronics Letters, vol. 56, no. 2, pp. 76-78, Jan. 2020.
[24] Dongmin Kim, Donggu Im, and In-Young Lee“A RF PVT compensated negative resistance circuit for Q-factor improvement of passive elements in CMOS,” in Journal of Semiconductor Technology and Science, vol. 19, no. 5, pp. 498-504, Oct. 2019.
[23] Donggu Im, Kuduck Kwon, and In-Young Lee,“A 1.9-GHz SOI CMOS stacked-FET power amplifier with uniformly distributed voltage stresses,” in International Journal of circuit Theory and Applications, vol. 45, no. 11, pp. 1660-1672, Nov. 2017.
[22] Doo Hyung Woo, Ilku Nam, Ockgoo Lee, and Donggu Im,“A UHF CMOS variable gain LNA with wideband input impedance matching and GSM interoperability,” in Journal of Semiconductor Technology and Science, vol. 17, no. 4, pp. 1-6, Aug. 2017.
[21] Donggu Im, and Ilku Nam,“An Up-conversion TV receiver front-end with noise canceling body-driven pMOS common gate LNA and LC-loaded passive mixer,” in IEICE Electronics Express, vol. 14, no. 9, pp. 1-11, May 2017.
[20] In-Young Lee, and Donggu Im,“A low power SOI CMOS antenna switch driver circuit with RF leakage suppression and fast switching time,” in IEEE Electronics Letters, vol. 53, no. 5, pp. 293-294, March 2017.
[19] Donggu Im, Ockgoo Lee, and Ilku Nam,“A TV receiver front-end with linearized LNA and current-summing harmonic rejection mixer,” in IEEE Transactions on Circuits and Systems II, vol. 64, no. 3, pp. 269-273, March 2017.
[18] Donggu Im, and In-Young Lee,“A high IIP2 broadband CMOS low noise amplifier with a dual-loop feedback,” in IEEE Transaction on Microwave Theory and Techniques, vol. 64, no. 7, pp. 2068-2079, July 2016.
[17] In-Young Lee, Donggu Im, Jinho Ko, and Sang-Gug Lee,“A 50-450 MHz tunable RF biquad filter based on a wideband sub-1 ohm Zout source follower with >26 dBm IIP3, +12 dBm P1dB, and <15 dB noise figure,” in IEEE Journal of Solid-State Circuits, vol. 50, no. 10, pp. 2294-2305, Oct. 2015.
[16] Donggu Im, Bum-Kyum Kim, Dokyung Im, and Kwyro Lee,“A stacked-FET linear SOI CMOS cellular antenna switch with an extremely low-power biasing strategy,” in IEEE Transaction on Microwave Theory and Techniques, vol. 63, no. 6, pp. 1964-1977, June 2015.
[15] Bum-Kyum Kim, Donggu Im, Jaeyoung Choi, and Kwyro Lee,“A highly linear 1 GHz 1.3 dB NF CMOS low-noise amplifier with complementary transconductance linearization,” in IEEE Journal of Solid-State Circuits, vol. 49, no. 6, pp. 1286-1301, June 2014.
[14] Donggu Im, and Ilku Nam,“A wideband digital TV receiver front-end with noise and distortion cancellation,” in IEEE Transactions on Circuits and Systems I, vol. 61, no. 2, pp. 562-572, Feb. 2014.
[13] Donggu Im, and Ilku Nam,“A 0.1 to 5 GHz Ultra-wide band single-to-differential CMOS LNA with output balancing for SDRs,” in IEICE Electronics Express, vol. 10, no. 24, pp. 1-7, Dec. 2013.
[12] Donggu Im, and Kwyro Lee,“Highly linear silicon-on-insulator CMOS digitally programmable capacitor array for tunable antenna matching circuits,” in IEEE Microwave and Wireless Components Letters, vol. 23, no. 12, pp. 665-667, Dec. 2013.
[11] Donggu Im, and Kwyro Lee,“Characterization and optimization of partially depleted SOI MOSFETs for high power RF switch applications,” in Solid-State Electronics, vol. 90, pp. 94-98, Dec. 2013.
[10] G. Hwang, Donggu Im, S. Lee, J. Lee, M. Koo, S. Park, S. Kim, K. Yang, S. Kim, K. R. Lee, and K. Lee, “In vivo silicon-based flexible radio frequency integrated circuits monolithically encapsulated with bio-compatible liquid crystal polymers,” in ACS Nano, vol. 7, no. 5, pp. 4545-4553, July 2013.
[9] Donggu Im, “A +9 dBm output P1dB active feedback CMOS wideband LNA for SAW-less receivers,” in IEEE Transactions on Circuits and Systems II, vol. 60, no. 7, pp. 377-381, July 2013.
[8] Donggu Im, and Kwyro Lee,“Stacked-FET linear SOI CMOS SPDT antenna switch with input P1dB greater than 40dBm,” in IEICE Electronics Express, vol. 9, no. 24, pp. 1813-1822, Dec. 2012.
[7] Donggu Im, Hong-Teuk Kim, and Kwyro Lee,“A broadband CMOS RF front-end for universal tuners supporting multi-standard terrestrial and cable broadcasts, ” in IEEE Journal of Solid-State Circuits, vol. 47, no. 2, pp. 392-406, Feb. 2012.
[6] Jaeyoung Choi, Donggu Im, and Kwyro Lee,“A self-tuned balun-LNA with differential imbalance correction and blocker filtering,” in IEEE Microwave and Wireless Components Letters, vol. 21, no. 12, pp. 673-675, Dec. 2011.
[5] Donggu Im, Ilku Nam, and Kwyro Lee,“A CMOS active feedback balun-LNA with high IIP2 for wideband digital TV receivers,” in IEEE Transaction on Microwave Theory and Techniques, vol. 58, no. 12, pp. 3566-3579, Dec. 2010.
[4] Donggu Im, Ilku Nam, and Kwyro Lee,“A low power broadband differential low noise amplifier employing noise and IM3 distortion cancellation for mobile broadcast receivers,” in IEEE Microwave and Wireless Components Letters, vol. 20, no. 10, pp. 566-568, Oct. 2010.
[3] Donggu Im, Hong-Teuk Kim, and Kwyro Lee,“A CMOS resistive feedback differential low noise amplifier with enhanced loop gain for digital TV tuner applications,” in IEEE Transaction on Microwave Theory and Techniques, vol. 57, no. 11, pp. 2633-2642, Nov. 2009.
[2] Donggu Im, Ilku Nam, Hong-Teuk Kim, and Kwyro Lee,“A wideband CMOS low noise amplifier employing noise and IMD2 distortion cancellation for digital terrestrial and cable TV tuner,” in IEEE Journal of Solid-State Circuits, vol. 44, no. 3, pp. 686-698, Mar. 2009.[1] Seong-Sik Song, Donggu Im, Hong-Teuk Kim, and Kwyro Lee,“A highly linear wideband CMOS low-noise amplifier based on current amplification for digital TV tuner applications,” in IEEE Microwave and Wireless Components Letters, vol. 18, no. 2, pp. 118-120, Feb. 2008.