Design Experience 

• 11/2004 ~ 6/2006: Low power CMOS Wireless Transceiver Design for IEEE 802.15.4 ZigBee Standard.

  Zigbee transmitter: LPF, VGA, Upmixer, DA.

  Rx/Tx RF Switch.

  6/2006 ~ 6/2007: MIMO Dual Band Transceiver Design

  Transmitter front-end: Upmixer, DA.

  RSSI (Received Signal Strength Indication).

  6/2007 ~ now: Tuner receiver for DMB.

  Harmonic Rejection Mixer: high linearity, wideband (50~800MHZ).

   

  

  Publications 

  • Viet-Hoang Le, Hoai-Nam Nguyen, In-Young Lee, Seok-Kyun Han, and Sang-Gug Lee, "A Passive Mixer for a Wideband TV Tuner," to be appeared in IEEE Transactions on Cirucuits and Systems-II, 2011

     

  • Viet-Hoang Le, Hoai-Nam Nguyen, Sun-a Kim, Seok-Kyun Han, Sang-Gug Lee, "A Wideband Noise Cancelling Low Noise Amplifier for 3GPP LTE Standard," to be appeared in IEICE TRANSACTIONS on Electronics, 2011

     

  • Viet-Hoang Le,Seok-Kyun Han, Sang-Gug Lee, "A Low Power Driver Amplifier for Unlicensed 2.4 GHz Band," IEICE TRANSACTIONS on Electronics, Jan, 2011.

     

  • Viet Hoang Le, Seok-Kyun Han, Jeong-Seon Lee, and Sang-Gug Lee.  “Current-Reused Ultra Low Power, Low Noise LAN+Mixer“, IEEE Microwave and Wireless Components Letters, 2009.

     

  • Viet-Hoang Le, Trung-Kien NGUYEN,Seok-Hyun Han and S.-G. Lee, “A 900 MHz RF Transmitter with Output LO Suppression", IEICE Trans, Electron,VOL E90-C. No.1, Jan. 2007.

     

  • Trung-Kien Nguyen, Viet-Hoang Le, Quoc-Hoang Duong, Seok-kyun Han, Sang-Gug Lee,Nak-Seon Seong, Nae-Soo Kim, and Chel-Sig Pyo," A Low Power Direct Conversion Transceiver for 915MHz-Band IEEE 802.15.4b Standard Based on 0.18 um CMOS Technology", ETRI Journal,vol.30, no.1,Feb. 2008.

     

  •  Trung-Kien Nguyen, Nam-Jin Oh, Viet-Hoang Le, and Sang-Gug Lee, "A Low Power CMOS Direct Conversion Receiver Front-end with 3-dB NF and 30-kHz Flicker Noise Corner for 915 MHz band IEEE 802.15.4 ZigBee Standard", IEEE Transactions on Microwave Theory and Techniques , Vol. 54, No. 2, pp. 735-741, Feb. 2006.

     

  • Le Viet Hoang, Nguyen Trung Kien, Sok Kyun Han and Sang-Gug Lee, "Low Power High Linearity Driver Amplifier for 900MHz Zigbee Applications", Seventeenth Asia-Pacific Microwave Conference (APMC'2005), Suzhou, China 4-7, Dec. 2005.

     

  • Le Viet Hoang, Sok Kyun Han and Sang-Gug Lee, "Characterization of LO leakage behavior in Transconductance Mixers”, 2005 IEEE International Conference on Electron Devices and Solid-State Circuits, Hong Kong, Dec 19-21, 2005.

     

  • Le Viet Hoang, Nguyen Trung Kien, Sok-Kyun Han and Sang-Gug Lee," Low Power High Linearity Transmitter Front-end for 900 MHz Zigbee Applications", IEEE International Symposium on Circuits and Systems (ISCAS' 06), Kos, Greece, May 21-24, 2006

     

  • Le Viet Hoang, Lee Sang-Gug, Han Seok-Kyun, "Current reuse wireless communication receivers", Application No. 10-2008-0113588, November 14, 2008. Korean patent Submitted.

     

  • Le Viet Hoang, Lee Sang-Gug, Lee Jeong-Seon, "Reconfiguration mixer", Application No. 10-2008-0090768. Korean patent Submitted.