Design and implementation of a low-pass filter for microsensor signal processing  

作　　者：王竹萍 仲顺安 丁英涛 王晓清 

机构地区：[1]School of Information and Electronics,Beijing Institute of Technology

出　　处：《Journal of Semiconductors》2010年第12期101-104,共4页半导体学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.60843005);the Basic Research Foundation of Beijing Institute of Technology,China(No.20070142018)

摘　　要：A novel low-pass filter that consists of a switched capacitor filter （SCF） and its antialiasing prefilter and smoothing postfilter is proposed for a microsensor signal processing system, which is used in separation point detection on the surface of micro air vehicles. In the system, the filter is not only applied to finish the function of filtering but also used as the front end antialiasing filter of the over sampling analog-to-digital converter. This proposed implementation mostly relies on the design of a high-precision SCF employing a correlated double sampling technique and optimisation switches. Simultaneously, the multiple-loop feedback low pass filter with good high frequency attenuation characteristics is applied as the pre- and postfilter. The design is implemented in the Central Semiconductor Manufacturing Corporation （CSMC） 0.5 μm double-poly three-metal （2P3M） 3 chip die area occupies only 0.39 mm2 and dissipatesl.53 mW. 3 V CMOS technology, with satisfactory results, TheA novel low-pass filter that consists of a switched capacitor filter （SCF） and its antialiasing prefilter and smoothing postfilter is proposed for a microsensor signal processing system, which is used in separation point detection on the surface of micro air vehicles. In the system, the filter is not only applied to finish the function of filtering but also used as the front end antialiasing filter of the over sampling analog-to-digital converter. This proposed implementation mostly relies on the design of a high-precision SCF employing a correlated double sampling technique and optimisation switches. Simultaneously, the multiple-loop feedback low pass filter with good high frequency attenuation characteristics is applied as the pre- and postfilter. The design is implemented in the Central Semiconductor Manufacturing Corporation （CSMC） 0.5 μm double-poly three-metal （2P3M） 3 chip die area occupies only 0.39 mm2 and dissipatesl.53 mW. 3 V CMOS technology, with satisfactory results, The

关 键 词：FILTER LOW-PASS LOW-POWER microsensor signal processing system 

分 类 号：TN713.4[电子电信—电路与系统]