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应用MAX264设计程控滤波器
引用本文:陈世夏,李树峰,戚甫峰,桑巧莲,韩丹涛. 应用MAX264设计程控滤波器[J]. 电子测量技术, 2008, 31(4): 171-174
作者姓名:陈世夏  李树峰  戚甫峰  桑巧莲  韩丹涛
作者单位:海军航空工程学院青岛分院航空电子系,青岛,266041
摘    要:本设计应用集成芯片MAX264设计一个程控滤波器。该滤波器主要由3个模块组成:前置放大、滤波电路、单片机显示与控制电路等。前置放大采用集成运放AD620构成;滤波器采用MAX264。然后利用单片机对MAX264编程,实现低通、高通及椭圆滤波器。通过测试达到了以下要求:输入正弦电压振幅为10mV时,总增益为40dB,通频带为100Hz~40kHz,;低通和高通滤波器,其-3dB截止频率fc在1~20kHz范围内可调,频率步进为1kHz,低通在2fc处总电压增益不大于30dB;高通在0.5fc处总电压增益不大于30dB;四阶椭圆型低通滤波器,带内起伏≤1dB,-3dB通带为50kHz,-3dB通带误差不大于5%。

关 键 词:放大器  高通  低通  程控滤波

Programmed control filter based on MAX264
Chen Shixia,Li Shufeng,Qi Fufeng,Sang Qiaolian,Han Dantao. Programmed control filter based on MAX264[J]. Electronic Measurement Technology, 2008, 31(4): 171-174
Authors:Chen Shixia  Li Shufeng  Qi Fufeng  Sang Qiaolian  Han Dantao
Abstract:This design of circuit is composed by 3 modules:a prime amplifier,a filter and the circuit of MCU display and control.In the preamplifier circuit,the small signal-amplifier is composed by proportional operational circuit of integrated amplifier AD620.The gain can be changed through adjusting the feedback-resistor.The filter-circuit consists of MAX integrated amplifier.The high pass and low pass and ellipse-filter are realized by the medium of the MAX264's programming.The MCU is able to control the display and data processing model.
Keywords:amplifier  high pass  low pass  programmed stop filter  
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