届韶关学院电子系毕业论文模板原版.docVIP

韶 关 学 院 毕 业 设 计 题 目：音响放大器设计 学生姓名：谢健斌 学 号：09101071040 院 （系）：物理与机电工程学院 电子系 专 业：电子信息科学与技术 班 级：2009级1班 指导老师姓名及职称：邱学峰 讲师 起止时间： 2012 年 9 月 —— 2013 年 5 月  音响放大器设计 摘 要：音响技术的发展历史可以分为电子管、晶体管、集成电路、场效应管四个阶段。长期以来，高品质音频放大器的工作类别，只限于A类(甲类)和AB类 (甲乙类)。其原因在于过去只有电子管这样的器件，B类(乙类)电子管放大器产生的失真使它们甚至在公共广播用时都难于被人们所接受。所有的自称为高保真放大器均工作于推挽式的A类(甲类)。 随着半导体器件的出现和发展，放大器的设计得到了更多的自由。就放大器的类别而言，已不限于A类(甲类)和AB类(甲乙类)，而出现了更多类别的放大器。不过需要指出，就目前来说用于音频功率放大器的工作类别，A类(甲类)、AB类(甲乙类)和B类(乙类)这三类放大器仍覆盖着半导体放大器的绝大多数。 本次设计采用晶体管器件设计放大器，此种方法的优点在于晶体管放大器具有细腻动人的音色、较低的失真、较宽的频响及动态范围等特点。还可以配合来自声源特别是数码声源的音质而设计和使用。它不会使声音降级。此外它还具有效率高，电力损失小等优点。 关键词： 电子音响放大器 Audio amplifier design Abstract：Audio technology development history can be divided into the electron tube, transistor, integrated circuits, MOSFET in four phases. Long time, high-quality audio amplifier class, restricted to category a (group a) and AB class (b class). Due to the past only tube devices, category b (b) tube amplifiers produce distortion even when the public broadcasting are difficult to be accepted. All claim to be high fidelity amplifiers are working in push-pull class a (group a). With the emergence and development of semiconductor device, amplifier design got more freedom. Amplifier for category is not limited to class a (group a) and AB class (b class), there are more types of amplifiers. However, it should be noted that, for the time being, work categories for audio power amplifier, class a (group a), the AB class (b class) and category b (b) three types of semiconductor amplifier of amplifier is still covered with the vast majority of. This design uses design amplifier transistor devices, and advantage to this method is that the transistor amplifier incorporates a fine and attractive timbre, lower distortion, wide dynamic range and frequency response characteristics. From sound sources and in particular the sound quality of digital sound sources can be combined with design and use. It will not make a sound degradation. In addition, it has high