摘要
本文介绍了基于开关电容滤波器(SCF)和直接数字频率合成器(DDS)构成的低通滤波电路,其截止频率可以在单片机的控制下精确地调整或设定。详细说明了电路的调试要点并给出了关键程序的实现代码。
This paper introduces a design and realization of a lowpass filter with cutoff frequency precision tunable or selected based on SCF and DDS. The filter's parameter is configured and controlled by single chip microcomputer (MCU). The paper also introduces in detail the hints of system debugging, and presents the key program.
出处
《安徽电子信息职业技术学院学报》
2008年第1期72-73,共2页
Journal of Anhui Vocational College of Electronics & Information Technology
基金
安徽农业大学校长青年资助
关键词
开关电容滤波器
直接数字合成
单片机
串行加载
witched-capacitor filter (SCF)
direct digital synthesis(DDS)
MCU
serial load mode