Hyeokjong LEE


A Low-Power Multi-Phase Oscillator with Transfer Gate Phase Coupler Enabling Even-Numbered Phase Output
Toshihiro KONISHI Hyeokjong LEE Shintaro IZUMI Takashi TAKEUCHI Masahiko YOSHIMOTO Hiroshi KAWAGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/12/01
Vol. E94-A  No. 12  pp. 2701-2708
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Circuit Design
Keyword: 
multi-phase oscillatortransfer gate phase couplereven-numbered phaseslow-powerprocess scalable
 Summary | Full Text:PDF(3MB)

A Low-Power Multi Resolution Spectrum Sensing Architecture for a Wireless Sensor Network with Cognitive Radio
Toshihiro KONISHI Shintaro IZUMI Koh TSURUDA Hyeokjong LEE Takashi TAKEUCHI Masahiko YOSHIMOTO Hiroshi KAWAGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2287-2294
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Mobile Information Network and Personal Communications
Keyword: 
MRSSmulti-resolution spectrum sensingcognitive radiowireless sensor networklow power
 Summary | Full Text:PDF(1.8MB)

A 58-µW Single-Chip Sensor Node Processor with Communication Centric Design
Shintaro IZUMI Takashi TAKEUCHI Takashi MATSUDA Hyeokjong LEE Toshihiro KONISHI Koh TSURUDA Yasuharu SAKAI Hiroshi KAWAGUCHI Chikara OHTA Masahiko YOSHIMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/03/01
Vol. E93-C  No. 3  pp. 261-269
Type of Manuscript:  Special Section PAPER (Special Section on Circuits and Design Techniques for Advanced Large Scale Integration)
Category: 
Keyword: 
cross-layer designsensor networkssensor nodeMAC protocoltime synchronizationlow power
 Summary | Full Text:PDF(1.6MB)

A 433-MHz Rail-to-Rail Voltage Amplifier with Carrier Sensing Function for Wireless Sensor Networks
Takashi TAKEUCHI Shinji MIKAMI Hyeokjong LEE Hiroshi KAWAGUCHI Chikara OHTA Masahiko YOSHIMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/06/01
Vol. E92-C  No. 6  pp. 815-821
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
wireless sensor networkamplifier
 Summary | Full Text:PDF(975.5KB)