A pseudo differential Gm-C complex filter with frequency tuning for IEEE802.15.4 applications  

作　　者：程心 钟伦贵 杨海钢 刘飞 高同强 

机构地区：[1]Institute of Electronics,Chinese Academy of Sciences [2]Graduate University of the Chinese Academy of Sciences [3]Department of Electronic Information and Electric Engineering,Fujian University of Technology

出　　处：《Journal of Semiconductors》2011年第7期89-96,共8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.2008AA010701)

摘　　要：This paper presents a CMOS G;-C complex filter for a low-IF receiver of the IEEE802.15.4 standard.A pseudo differential OTA with reconfigurable common mode feedback and common mode feed-forward is proposed as well as the frequency tuning method based on a relaxation oscillator.A detailed analysis of non-ideality of the OTA and the frequency tuning method is elaborated.The analysis and measurement results have shown that the center frequency of the complex filter could be tuned accurately.The chip was fabricated in a standard 0.35μm CMOS process,with a single 3.3 V power supply.The filter consumes 2.1 mA current,has a measured in-band group delay ripple of less than 0.16μs and an IRR larger than 28 dB at 2 MHz apart,which could meet the requirements of the IEEE802.15.4 standard.This paper presents a CMOS G_m-C complex filter for a low-IF receiver of the IEEE802.15.4 standard.A pseudo differential OTA with reconfigurable common mode feedback and common mode feed-forward is proposed as well as the frequency tuning method based on a relaxation oscillator.A detailed analysis of non-ideality of the OTA and the frequency tuning method is elaborated.The analysis and measurement results have shown that the center frequency of the complex filter could be tuned accurately.The chip was fabricated in a standard 0.35μm CMOS process,with a single 3.3 V power supply.The filter consumes 2.1 mA current,has a measured in-band group delay ripple of less than 0.16μs and an IRR larger than 28 dB at 2 MHz apart,which could meet the requirements of the IEEE802.15.4 standard.

关 键 词：IEEE802.15.4 standard complex filter G_m-C filter frequency tuning 

分 类 号：TN713[电子电信—电路与系统]