自动增益放大电路设计——十一组.docx

大学生电子竞赛自动增益放大电路 第 PAGE13 / NUMPAGES13页 设计报告 设计题目：自动增益放大电路 参赛者姓名：xxx,xxx,xxx 所在学院：xxx 所在班级：xxx 竞赛时间：xxxx.xx.xx 自动增益放大电路 摘要：自动增益控制电路已广泛用于各种接收机、录音机和信号采集系统中，另外在光纤通信、微波通信、卫星通信等通信系统以及雷达、广播电视系统中也得到了广泛的应用。自动增益放大电路一方面可实现自增益。另一方面通过MSP430单片机实现键控增益。为实现稳定输出，需对放大器的增益进行自动控制。设计主要提出自动增益放大电路的总体设计方案，并对主要功能模块进行方案论证比较。重点对自动增益放大电路的硬件部分和软件系统进行设计。最后对系统进行完整测试和仿真，对结果进行分析。实现稳定可靠，操作方便，具有较好的操作功能。 关键词：自动增益；放大电路；MSP430单片机；键控。 Abstract: the automatic gain control circuit has been widely used in various kinds of receiver, recorder and signal acquisition system, in the optical fiber communication systems such as communication, microwave communication, satellite communications, and radar, radio and television are widely used in the system. On the one hand, it can realize automatic gain amplifier circuit gain. On the other hand keying gain was achieved by MSP430 single chip microcomputer. To achieve stable output, the need to automatically control the gain of the amplifier. Design mainly puts forward the overall design scheme of automatic gain amplifier circuit, and the main function module are compared and project demonstration. Key part of automatic gain amplifier circuit of hardware and software system design. Finally to complete the test and simulation of system, analyze the results. Realize the stable and reliable。 Key words: automatic gain; Amplifying circuit; MSP430 single chip microcomputer; keying 目录  TOC \o 1-3 \h \z \u HYPERLINK \l _Toc426270980 自动增益放大电路  PAGEREF _Toc426270980 \h 2 HYPERLINK \l _Toc426270981 摘要  PAGEREF _Toc426270981 \h 2 HYPERLINK \l _Toc426270982 一、方案论证比较  PAGEREF _Toc426270982 \h 3 HYPERLINK \l _Toc426270983 1、多路模拟开关  PAGEREF _Toc426270983 \h 3 HYPERLINK \l _Toc426270984 1.2单片机控制选择  PAGEREF _Toc426270984 \h 5 HYPERLINK \l _Toc426270985 1.3后置放大器的选择  PAGEREF _Toc426270985 \h 6 HYPERLINK \l _Toc426270986 二、电路设计与程序设计  PAGEREF _Toc426270986 \h 7 HYPERLINK \l _Toc426270987 2.1系统设计流程图  PAGEREF _Toc426270987 \h 7 H