Lechang LIU


Parametric Resonance Based Frequency Multiplier for Sub-Gigahertz Radio Receiver with 0.3V Supply Voltage
Lechang LIU Keisuke ISHIKAWA Tadahiro KURODA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/06/01
Vol. E97-C  No. 6  pp. 505-511
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
parametric resonanceinjection-locked frequency multiplierphase noiseradio frequency (RF)
 Summary | Full Text:PDF

A 315 MHz Power-Gated Ultra Low Power Transceiver in 40 nm CMOS for Wireless Sensor Network
Lechang LIU Takayasu SAKURAI Makoto TAKAMIYA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/06/01
Vol. E95-C  No. 6  pp. 1035-1041
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
injection lockpower gatinglow noise amplifierultra low power
 Summary | Full Text:PDF

0.6 V Voltage Shifter and Clocked Comparator for Sampling Correlation-Based Impulse Radio UWB Receiver
Lechang LIU Takayasu SAKURAI Makoto TAKAMIYA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/06/01
Vol. E94-C  No. 6  pp. 985-991
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
impulse radio ultra-wideband (IR-UWB)voltage shifterclocked comparatorlow voltage
 Summary | Full Text:PDF

A 1.76 mW, 100 Mbps Impulse Radio UWB Receiver with Multiple Sampling Correlators Eliminating Need for Phase Synchronization in 65-nm CMOS
Lechang LIU Zhiwei ZHOU Takayasu SAKURAI Makoto TAKAMIYA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/06/01
Vol. E93-C  No. 6  pp. 796-802
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
impulse radio ultra-wideband (IR-UWB)charge-domain sampling correlatorscharge injectionvariable threshold comparatorlow power
 Summary | Full Text:PDF

A 100 Mbps, 4.1 pJ/bit Threshold Detection-Based Impulse Radio UWB Transceiver in 90 nm CMOS
Lechang LIU Yoshio MIYAMOTO Zhiwei ZHOU Kosuke SAKAIDA Jisun RYU Koichi ISHIDA Makoto TAKAMIYA Takayasu SAKURAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/06/01
Vol. E92-C  No. 6  pp. 769-776
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
impulse radio ultra-wideband (IR-UWB)digital pulse-shapingpulse discriminatorerror-recovery phase-frequency detector
 Summary | Full Text:PDF