一种低中频宽带跨导电容带通滤波器设计
Microprocessors(2011)
Abstract
基于TSMC 0.18μm CMOS工艺,采用七阶低通butterworth滤波器和六阶高通butter-worth滤波器级联,设计实现了一款适用于北斗二号卫星导航接收机的中频带通滤波器。仿真结果表明,滤波器中心频率为15MHz,带宽为21MHz,阻带抑制率大于30dB,带内波纹小于1dB,工作电压1.8V,滤波器消耗总电流为6mA,性能满足卫星接收机设计要求。
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Key words
OTA,Current-mode,Leapfrog filter,Wideband filter
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