摘要
为解决椭圆滤波器通带纹波较大的问题,设计了一种基于双二阶的椭圆窄带带通滤波器,滤波器由3个双二阶构造的带阻滤波器级联实现,滤波器中心频率11kHz,带宽2kHz,通带纹波不超过1dB,阻带衰减不小于30dB每倍频程。滤波器功耗不超过30mW,满足水下引信接收机长时间工作的要求。
A narrow bandpass Elliptic filter is designed with double second-order to solve the large bandpass ripple of Elliptic filter. The filter is constructed from three pairs of double second-order bandstop filter. The frequency of the filter is centered at 11 kHz with a bandwidth of 2 kHz. The ripple of the passband is less than ldB. and the attenuation of the stopband is greater than 30 dB. The filter, whose power consumption is less than 30roW, meets the requirements of underwater fuze receiver to work long hours.
出处
《电声技术》
2010年第5期34-36,共3页
Audio Engineering
基金
船总基金项目资助(08J4.4.4)
关键词
水下引信接收机
低功耗
椭圆带通滤波器
双二阶
underwater fuze receiver
low-power
elliptic bandpass filter
double second-order
