模拟电子技术课程设计说明书
扩音机
系 、 部: 电气与信息工程学院 学生姓名: 指导教师: 贾雅琼 职称 讲师 专 业: 自动化 班 级: 自本1004班 完成时间: 2010年6月10日
摘 要
近几年来,计算机技术进入了前所未有的快速发展时期,随着电子信息技术的发展关于音响放大器在电子技术基础中所处的位置越来越重要,它不仅是电子信息类专业的一个重要部分,而且在其他类专业工程中也是不可缺少的。
扩音机的通常作用是把从话筒等音频设备输出的微弱的信号放大成能推动扬声器发声的大功率信号,故主要用到运算放大器和功率放大器。因此由前置放大器、音调控制器、功率放大器这几个部分组成。
前置放大器对输入信号进行适当的放大,放大后的信号送入音调网络, 最后送入功率放大级进行功率放大后的信号送入扬声器,在扬声器上得到了放大后的音调信号。
关键词:计算机;电子信息技术;扩音机;前置放大;音调控制器;功率放大器
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ABSTRACT
In recent years, computer technology has entered the rapid development period of hitherto unknown, with the development of electronic information technology in electronic technology based on audio amplifier in the increasingly important position, it is not only the specialties of electronic information is an important part, but also in other types of professional engineering is necessary.
The purpose is to change the megaphone usually from microphone audio devices such as the weak signal output enlarged speaker of the high power can promote the voice signal, it mainly use the operational amplifiers and power amplifier.So by preamplifier、tone controller、power amplifier this several parts.
The preamplifier of the input signal to the appropriate amplifier, enlarge after the signal into tones network, finally into power amplifier level power amplifier after the signal into the speaker, the speaker has been amplified the tones of the signal.
Key words: The computer; Electronic information technology; Megaphone; Preamplifier; Tone controller; Power amplifier
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