| 数字式可编程带通滤波器的研究 |
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| 引用本文： | 葛伟亮,秦义忠.数字式可编程带通滤波器的研究[J].北京理工大学学报,1992,12(4):85-93. |
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| 作者姓名： | 葛伟亮 秦义忠 |
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| 作者单位： | 北京理工大学自动控制系
(葛伟亮，秦义忠)，北京理工大学自动控制系(叶素军) |
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| 摘 要： | 介绍一种新型的数字式可编程带通滤波器.该滤波器是由高通滤波器和低通滤波器串联组成的RC有源滤波器.传统的RC有源滤波器不能用数字量来控制截止频率,采用数/模转换器代替可调电阻,实现用数字量改变电阻值,从而达到改变截止频率的目的.该滤波器可与MCS-51单片微机直接接口.在所研制的智能化仪器中使用,获得了满意的效果。
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| 关 键 词： | 带通滤波器 数－模转换器 |
A New Type of Digital Programmable Bandpass Filter |
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| Ge Weiliang Qin Yizhong Ye Sujun.A New Type of Digital Programmable Bandpass Filter[J].Journal of Beijing Institute of Technology(Natural Science Edition),1992,12(4):85-93. |
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| Authors: | Ge Weiliang Qin Yizhong Ye Sujun |
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| Abstract: | A new type of digital programmable bandpass filter is introduced, which is made up of a PC active filter with a high pass filter and a low pass one in series. In traditional PC active filters, digital variables cannot be used to control the cutoff frequencies. A D/A converter is used instead of the adjustable resistance so that the resistance can be altered by digital variables and the cutoff frequency changed. This filter can be directly interfaced, e.g. with a MCS -51 single chip microcomputer. It has been applied in an intelligent instrument, attaining satisfactory results. |
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| Keywords: | bandpass filters digital to analog converters/single chip microcomputer programmable bandpass filter |
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