摘要
带阻滤波器是电子系统中常用的滤波器,通常在无线电通信系统中用以抑制噪声信号,在电子设备的电磁兼容测量中用以滤除基波或谐波。分析了两种带阻滤波器的原理、构成、特点及设计要点。运用波特测量仪对各带阻滤波器的仿真电路进行频率特性测定。结果表明,使用由带通滤波器与运算放大器构成的有源带阻滤波器,既可抑制单一频率的噪声信号,又可通过级联方式滤除较窄频带的噪声信号;使用低通滤波器和高通滤波器的无源双T带阻滤波器和有源双T带阻滤波器,对单一频率的噪声信号,可达到更好的滤除效果。
The band stop filter is a common filter in electronic system. It is often used to suppress noise signals in radio communication systems, and to filter fundamental waves or harmonics in electromagnetic compatibility measurement of electronic equipment. The principle, structure, characteristics and design points of two kinds of band stop filters are analyzed. The frequency characteristics of the simulation circuits of each band stop filter are measured by using a baud measuring instrument. The results show that the active band stop filter composed of a band-pass filter and an operational amplifier can not only suppress the noise signal of a single frequency, but also filter out the noise signal of a narrower frequency band by cascading. The passive double T band stop filter and the active double T band stop filter composed of the low pass filter and the high pass filter have better filtering effect on noise signal with the single frequency.
作者
唐金元
王翠珍
任秀芳
杨晓霞
TANG Jinyuan;WANG Cuizhen;REN Xiufang;YANG Xiaoxia(Qingdao Branch of Naval Aviation University,Qingdao 266041,China)
出处
《仪表技术》
2023年第1期64-68,共5页
Instrumentation Technology
关键词
滤波器
带阻
带通
阻带
仿真
filter
band stop
band pass
stop-band
simulation
