A CMOS G_m-C complex filter with on-chip automatic tuning for wireless sensor network application  

作　　者：万川川 李智群 侯凝冰 

机构地区：[1]Institute of RF-& OE-ICs,Southeast University

出　　处：《Journal of Semiconductors》2011年第5期81-86,共6页半导体学报（英文版）

基　　金：Project supported by the National High Technology Research and Development Program of China(No.2007AA01Z2A7);the 5th Program of Six Talent Summits of Jiangsu Province,China.

摘　　要：A Gm-C complex filter with on-chip automatic tuning for wireless sensor networks is designed and implemented using 0.18 μm CMOS process. This filter is synthesized from a low-pass 5th-order Chebyshev RLC ladder filter prototype by means of capacitors and fully balanced transconductors. A conventional phase-locked loop is used to realize the on-chip automatic tuning for both center frequency and bandwidth control. The filter is centered at 2 MHz with a bandwidth of 2.4 MHz. The measured results show that the filter provides more than 45 dB image rejection while the ripple in the pass-band is less than 1.2 dB. The complete filter including on-chip tuning circuit consumes 4.9 mA with 1.8 V single supply voltage.A Gm-C complex filter with on-chip automatic tuning for wireless sensor networks is designed and implemented using 0.18 μm CMOS process. This filter is synthesized from a low-pass 5th-order Chebyshev RLC ladder filter prototype by means of capacitors and fully balanced transconductors. A conventional phase-locked loop is used to realize the on-chip automatic tuning for both center frequency and bandwidth control. The filter is centered at 2 MHz with a bandwidth of 2.4 MHz. The measured results show that the filter provides more than 45 dB image rejection while the ripple in the pass-band is less than 1.2 dB. The complete filter including on-chip tuning circuit consumes 4.9 mA with 1.8 V single supply voltage.

关 键 词：complex filter Gm-C TRANSCONDUCTOR automatic tuning wireless sensor networks 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TN929.5[自动化与计算机技术—控制科学与工程]