文档介绍：山东理工大学
毕业设计(论文)
题目:集成有源滤波器的设计
申请山东理工大学工学学士学位论文
学院:电气与电子工程学院
专业: 电子信息工程
学生姓名: 王芸
指导教师: 苗汇静
毕业设计(论文)时间:二О一О年三月一日~六月十八日共16周
摘要
本文设计了一个集成有源滤波器系统。该系统以凌阳单片机SPCE061A作为控制中心,用美国Maxim公司的通用型有源滤波器MAX275芯片来完成滤波功能。本设计的主要内容包括:凌阳单片机SPCE061A控制电路、基于MAX275的集成有源滤波器电路、继电器接口电路、键盘及显示电路、电源电路以及软件实现等。该系统采用MAX275专用集成有源滤波器芯片以及配套的MAX274/5滤波器设计软件相结合的方式,用可编程数字电位器X9241构成滤波电路的外围电阻电路,通过专用的滤波器设计软件计算相关参数值,用键盘设置不同的工作模式,分别完成二阶、四阶的低通、带通等滤波功能,滤波器的通带、截止频率等参数也可通过键盘设置。整个系统的控制和操作全部由凌阳单片机通过控制电路完成,如滤波模式的选择、滤波参数的设置、LCD显示等。
本系统设计简单,成本低,能很好地实现各种滤波滤波功能,使用方便,易于控制,具有较高的性价比、实用性和使用价值。
关键词:集成有源滤波器,MAX275,模式选择,参数设置,凌阳单片机
Abstract
This paper designs an integrated active filter system. This system to SPCE061A chip sunplus as the control center, with American pany general-purpose filter MAX275 chip plete the filter function. The design of the main contents include :sunplus SPCE061A chip control circuit, MAX275 based on the integration of active power filter circuits, relay interface circuit, the keyboard and display circuit, the power circuit and the software realization. In this system MAX275 adopts special-purpose integrated active filter chip and MAX274/5 bined design software, by programmable digital potentiometer X9241 constitute the periphery of the filter circuit resistance circuit, through the special filter designing software calculation related parameter values. use the keyboard settings of different working mode, to finish the second and fourth order respectively the low-pass filter function, band-pass etc. The bandpass filter cutoff frequency characteristics, and also through the keyboard Settings. The whole system of control and operation by MCU control circuit pleted by sunplus, such as filtering model selection, filter parameters Settings, LCD display, etc.
The system design is simple, low cost, can well realize various filtering filter function, use convenient, easy to control, with high performance, practicability and use value.
Keywords: Integrated active filter, MAX275, Pattern choice, Pa