学年论文李福.doc

学年论文李福.doc0 本科学年论文. 题目:音频放大器的设计院系电子信息工程学院专业名称自动化年级 2008 级学生姓名胡冰冰学号 00829013 指导教师周润景日期 2010-9-05 内蒙古大学本科学年论文 1/22/2017 第 1页 11 音频放大器设计设计摘要: 音频功率放大器是音响设备的重要组成部分,其作用是将传声器件获得的微弱信号放大到足够的强度去推动放声系统中的扬声器或其他电声器件,使得原声重现。本次设计在仿真软件的基础上,设计一个简单的音频放大器,将小的音频信号放大,并在一定的范围内将信号输出。电路的设计包括直流稳压源,前置放大器,主放大器,扬声器几个部分组成,其中直流稳压源输出为± 15V 的稳定电压, 为整个电路提供稳定的能量,功率放大电路的前级部分是对输入信号进行协调处理、起前置放大作用、并执行音色调控工作的电路,其中的输入级基本上都用运放作前置单元,音调控制部分则有负反馈式和衰减式之分。从音色调控的效果上看, 均衡器的控制范围和补偿效果都是最佳的,因此,功率放大器的前级电路最好采用均衡器电路形式进行设计。。所有的电路设计,调试及完成都在仿真软件上进行,最后完成电路板的焊接。关键词: 稳压源放大器功率放大器内蒙古大学本科学年论文 1/22/2017 第 2页 22 Title: Audio Amplifier Design Author :胡冰冰 Tutor : 周润景 Design Summary: Audio power amplifier isan ponent of audio equipment, its role is to get the microphone pieces of the weak signal amplification sufficient strength to drive speakers burst into the system, or other electro-acoustic devices, making acoustic reproduce. The design based on the simulation software to design a simple audio amplifier, the small audio signal amplification, and within a certain range of signal output. Circuit design including DC source, pre-amplifier, main amplifier, speakers of ponents, including DC source output stable voltage of±15V for the entire circuit to provide a stable energy level before the power amplifier circuit part is to coordinate the input signal processing, from pre-amplification and the implementation of sound regulation and control circuit, in which the input stage are basically used for pre-op-amp unit, tone control section there are negative feedback type and attenuation type of points. From the sound effects of regulation and control perspective, the EQ control range pensation effects are the best, so the first stage power amplifier circuit preferably in the form ofa balanced circuit design. All the circuit design, commissioning pletion of all the simulation software with the pletion of the circuit board welding. Keywords: r egulators source , amplifier , power amplifier 内蒙古大学本科学年论文 1/22/2017 第 3页 33 目录第一章绪论 设计目的及意义············