Sang-Gug LEE


A Single-Supply 84 dB DR Audio-Band ADC for Compact Digital Microphones
Huy-Binh LE Sang-Gug LEE Seung-Tak RYU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/01/01
Vol. E95-C  No. 1  pp. 130-136
Type of Manuscript:  PAPER
Category: Electronic Circuits
Keyword: 
electret capacitor microphone (ECM)digital microphoneaudio ADC
 Summary | Full Text:PDF(1MB)

A Low Power and Low Noise On-Chip Active RF Tracking Filter for Digital TV Tuner ICs
Yang SUN Chang-Jin JEONG In-Young LEE Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/10/01
Vol. E94-C  No. 10  pp. 1698-1701
Type of Manuscript:  BRIEF PAPER
Category: Electronic Circuits
Keyword: 
CMOSon-chipDTV tuneractive RF tracking filtertransconductance-c filter (Gm-C filter)low-pass filter (LPF)
 Summary | Full Text:PDF(494.3KB)

An Analog Controlled Variable Gain LNA with Tunable Frequency Bands
Yuna SHIM Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/07/01
Vol. E94-C  No. 7  pp. 1240-1242
Type of Manuscript:  LETTER
Category: Electronic Circuits
Keyword: 
analog controlLNAlow supply voltagewideband
 Summary | Full Text:PDF(375.8KB)

A Wideband Noise Cancelling Low Noise Amplifier for 3GPP LTE Standard
Viet-Hoang LE Hoai-Nam NGUYEN Sun-a KIM Seok-Kyun HAN Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/06/01
Vol. E94-C  No. 6  pp. 1127-1130
Type of Manuscript:  BRIEF PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
common gateCMOScapacitive cross-couplinghighly linear gmLTEnoise cancellationwideband LNA
 Summary | Full Text:PDF(255KB)

A Low Power Driver Amplifier for Unlicensed 2.4 GHz Band
Viet-Hoang LE Seok-Kyun HAN Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/01/01
Vol. E94-C  No. 1  pp. 120-123
Type of Manuscript:  BRIEF PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
current reusedriver amplifierhigh drain efficiencyhigh PAElow power transmitter
 Summary | Full Text:PDF(315.7KB)

Yield-Ensuring DAC-Embedded Opamp Design Based on Accurate Behavioral Model Development
Yeong-Shin JANG Hoai-Nam NGUYEN Seung-Tak RYU Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/06/01
Vol. E93-C  No. 6  pp. 935-937
Type of Manuscript:  LETTER
Category: Electronic Circuits
Keyword: 
DACDAC-embeddedbehavioral modelyield
 Summary | Full Text:PDF(304.3KB)

Low Voltage Current-Reused Pseudo-Differential Programmable Gain Amplifier
Huy-Hieu NGUYEN Jeong-Seon LEE Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/01/01
Vol. E93-C  No. 1  pp. 148-150
Type of Manuscript:  LETTER
Category: Electronic Circuits
Keyword: 
variable gain amplifier (VGA)programmable gain amplifier (PGA)low power amplifieranalog circuit
 Summary | Full Text:PDF(440.1KB)

A Fully On-Chip Gm-Opamp-RC Based Preamplifier for Electret Condenser Microphones
Huy-Binh LE Seung-Tak RYU Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/04/01
Vol. E92-C  No. 4  pp. 587-588
Type of Manuscript:  LETTER
Category: Electronic Circuits
Keyword: 
electret microphonepreamplifierswitched-capacitorsigma-delta
 Summary | Full Text:PDF(195.8KB)

A Complementary-Coupled CMOS LC Quadrature Oscillator
Seok-Ju YUN Dae-Young YOON Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/11/01
Vol. E91-C  No. 11  pp. 1806-1810
Type of Manuscript:  PAPER
Category: Electronic Circuits
Keyword: 
complementary metal oxide semiconductor (CMOS)quadrature oscillatorphase noiseI/Q phase error
 Summary | Full Text:PDF(403.3KB)

An LC-VCO Strongly Suppresses the AM-FM Conversion Caused by Varactor
So Bong SHIN Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/09/01
Vol. E91-C  No. 9  pp. 1516-1519
Type of Manuscript:  LETTER
Category: Electronic Circuits
Keyword: 
LC-VCOAM to FM conversion1/f noisevaractor nonlinearitytransformerCMOS
 Summary | Full Text:PDF(307.4KB)

All CMOS Low-Power Wide-Gain Range Variable Gain Amplifiers
Quoc-Hoang DUONG Chang-Wan KIM Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/05/01
Vol. E91-C  No. 5  pp. 788-797
Type of Manuscript:  PAPER
Category: Electronic Circuits
Keyword: 
variable gain amplifier (VGA)automatic gain control (AGC)transceiveramplifier
 Summary | Full Text:PDF(1.3MB)

A 90 dB 1.32 mW 1.2 V 0.13 mm2 Two-Stage Variable Gain Amplifier in 0.18 µm CMOS
Quoc-Hoang DUONG Jeong-Seon LEE Sang-Hyun MIN Joong-Jin KIM Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/05/01
Vol. E91-C  No. 5  pp. 806-808
Type of Manuscript:  LETTER
Category: Electronic Circuits
Keyword: 
variable gain amplifier (VGA)automatic gain control (AGC)amplifieranalog circuittransceiver
 Summary | Full Text:PDF(332.2KB)

360-µW/1 mW Complementary Cross-Coupled Differential Colpitts LC-VCO/QVCO in 0.25-µm CMOS
Jong-Phil HONG Seok-Ju YUN Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/12/01
Vol. E90-C  No. 12  pp. 2289-2292
Type of Manuscript:  LETTER
Category: Electronic Circuits
Keyword: 
CMOScross-coupled Colpitts oscillatorlow powerquadrature VCOvoltage controlled oscillator (VCO)
 Summary | Full Text:PDF(392.8KB)

A 900 MHz RF Transmitter with Output LO Suppression
Viet-Hoang LE Trung-Kien NGUYEN Seok-Kyun HAN Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/01/01
Vol. E90-C  No. 1  pp. 201-203
Type of Manuscript:  LETTER
Category: Electronic Circuits
Keyword: 
CMOS transceiver front-endIEEE 802.15.4LO leakage suppressionlow power transmitter
 Summary | Full Text:PDF(355.5KB)

Frequency-Controllable Image Rejection Down CMOS Mixer
Tuan-Anh PHAN Chang-Wan KIM Yun-A SHIM Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/12/01
Vol. E88-C  No. 12  pp. 2322-2324
Type of Manuscript:  Special Section LETTER (Special Section on Wireless Technologies and Computational Electromagnetics)
Category: Devices
Keyword: 
mixerimage rejection filterCMOS mixerRF integrated circuits
 Summary | Full Text:PDF(259.6KB)

A High Performance CMOS Direct Down Conversion Mixer for UWB System
Tuan-Anh PHAN Chang-Wan KIM Yun-A SHIM Sang-Gug LEE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/12/01
Vol. E88-C  No. 12  pp. 2316-2321
Type of Manuscript:  Special Section PAPER (Special Section on Wireless Technologies and Computational Electromagnetics)
Category: Devices
Keyword: 
mixersdirect conversion mixerflicker noiseUWBCMOS integrated circuit
 Summary | Full Text:PDF(575KB)

Measured Results on Symmetric Dual-Level Spiral Inductors for RF ICs
Sang-Gug LEE So-Bong SHIN Gook-Ju IHM 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/06/01
Vol. E84-C  No. 6  pp. 845-848
Type of Manuscript:  LETTER
Category: Electronic Components
Keyword: 
spiral inductorsymmetricRF ICsquality factor
 Summary | Full Text:PDF(472.3KB)