可调增益程控滤波器的设计  

Design of the Gain Adjustable Programmable Control Filter

作　　者：周燕[1] 崔琪琳[1] 田杜养[1] 

机构地区：[1]西安石油大学电子工程学院,陕西西安710065

出　　处：《现代电子技术》2008年第23期148-150,共3页Modern Electronics Technique

摘　　要：介绍一款用于处理含有噪声和干扰的微弱信号的可调增益程控滤波器,程控放大部分由AD7520内部集成的电阻网络和运算放大器AD826组成,程控滤波部分由可编程控制滤波器芯片MAX261来完成,用单片机89c51作为控制器,对程控增益部分和程控滤波进行编程控制其增益和滤波频率,同时配合键盘和显示部分完成设定和显示当前的设定,能够对带噪声的微弱信号进行放大和处理。A gain adjustable programmable control filter, which is used to process the weak signal with noise and interference. The part of programmable amplifier uses the net of resistance of AD7520 and it is composed of operation amplifier AD826,the programmable control filter part uses the chip of programmable control filter MAX261, the controller uses single chip 89C51 to control the gain and the programmable control filter. At the same time,cooperating the keyboard and the show part to fulfill the enactment. The system can amplify and process the weak signal with noise and interference.

关 键 词：程控滤波器 可调增益 MAX261 AD7520 

分 类 号：TN713[电子电信—电路与系统]