摘要
给出了一种用单片机控制、通带边界频率可调、适用于较高频率的有源滤波器的设计方法。以一个通带边界频率调整范围为190k^505kH z,调整步长为15kH z。滤波器的阻带衰减大于50dB的滤波器设计为例进行了说明。实测结果表明,该设计方案具有较低的元件参数灵敏度。
A design method of passband edge frequency adjustable active filter is presented. The filter is controlled by a microprocessor. The passband edge can be tuned from 190kHz to 505kHz with tuning step of 15kHz. Filter＇s attenuation in stopband is greater than 50dB. Measured result shows that the filter has low element sensitivity.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2006年第3期295-297,314,共4页
Chinese Journal of Scientific Instrument
关键词
有源滤波器
低通滤波器
单片机
频率可调
Active filter Lowpass filter Microprocessor Frequency adjustment
