Projects

Projects history

□ RFIC & Frequency synthesizer

- 2011.02 ~ 2012.2: A 65nm CMOS frequency synthesizer for LTE RF transceiver (INC technology Inc.)

- 2007.04 ~ 2008.02: A 130nm CMOS frequency synthesizer for L1/L5 dual-band GPS receiver

- 2007.12 ~ 2008.11: A 90nm CMOS Frequency synthesizer for L5 GPS receiver (FCI Inc.)

· It consumes small VCO area of 90um*70um due to a ring-type VCO with temperature and supply compensation

- 2008.12 ~ 2010.01: A 130nm CMOS Digital frequency synthesizer for mobile TV (FCI Inc.)

· A new area-efficient & low-power scheme for all-digital PLL is proposed and verified

- 2010. 6 ~ 2011.2: A 180nm CMOS universal tuner IC (Raontech Inc.)

· freq: 50 ~ 860 MHz, NF: 2 ~ 3.7 dB, IIP3: -18dBm(VHF), -14dBm(UHF) @ N+1 ch.

sensitivity: -99dBm @ 1-seg., -86dBm @ full-seg.

- 2007.12 ~ 2012.2: A 65nm CMOS Analog Front-end for NFC transceiver IC ( MtekVision Co.)

· It supports ISO/IEC 1443 A&B and ISO/IEC 18092 standards, respectively

· It achieves peer-to-peer data rate up to 424kbps

□ LED driver IC & PMIC

- 2014.6 ~ : PVT-insensitive PMIC for DVFS (한국 연구재단)

- 2010.3 ~ 2011.2: Temperature-compensated LED driver IC based on a boost-type DC-DC converter(지식 경제부)

- 2011.2 ~ 2011.11: An 12W, 2-channel LED driver IC with automatic compensation for channel current mismatch(지식경제부)

- 2011.2 ~ 2014.2: An 8W all-digital LED driver IC(지식경제부)

- 2011.12 ~ : An 110nm CMOS all-digital LDO with fast-switching and low-standby current capability (지식경제부)

Acquired Patents

□ U.S.

· “Self-regulating voltage controlled oscillator“, 6,861,911

· “Capacitance multiplier”, 7,113,022

· “Circuit for compensating for the declination of balanced impedance elements and a frequency mixer”, 7,106,095

· “Circuit and method for receiving and mixing radio frequencies in a direct conversion receiver”, 7,120,414

· “Frequency synthesizer using a wide-band voltage controlled oscillator and a fast adaptive frequency calibration method”, 7,154,348

· “Multi-band transceiver for a wireless communication system”, 7,181,181

· “Low noise reference circuit of improving frequency variation of ring oscillator”, 8,405,376, 2013

□ Korean

· Buck boost DC-DC Converter for LED Driver (0002555), 2015.11.27

· An integrated power management unit for DVFS (0002554), 2015.11.27

· SMD을 이용한 디지털 제어 방식의 LDO 레귤레이터 (10-1540858), 2015.7.24

· LED 구동장치 (10-1475592), 2014.12.16

· 동적 전압 주파수 변환 장치 (10-1462756), 2014.11.11

· LED 구동장치 (10-1401776), 2014.5.23

· 자동주파수 교정회로 및 이를 포함한 주파수 합성장치 (10-1364843) 2014.2.12

· 능동 전류 조절기를 포함하는 LED 조명 구동 장치 (10-1297954), 2013.8.12

· 디지털 제어방식을 이용한 LED구동방식 (10-1244715), 2013.3.12

· 디지털 직류-직류 변환기(10-1206300), 2012.11.23

· 디지털 제어 방식을 이용한 LDO 레귤레이터 (10-1198852), 2012.11.1

· LED 접합온도의 보상구동회로 (10-1027938), 2011.04.01

· LED 배면광 구동회로 (10-1049972), 2011.7.11

· 링오실레이터의 주파수 변동 개선을 위한 저잡음 기준전압 발생 회로 (10-1053259), 2011.7.26