低频功率放大器01147.docVIP

摘 要 功率放大器不仅仅是消费产品(音响)中不可缺少的设备,还广泛应用于控制系统和测量系统中。低频功率放大器是一个技术已经相当成熟的领域，几十年来,人们为之付出了不懈的努力，无论从线路技术还是元器件方面，乃至思想认识上都取得了长足的进步。本文介绍制作具有小信号放大能力的低频功率放大器的基本原理、内容，即介绍制作具有小信号放大能力的低频功率放大器的基本原理、内容、技术。整个电路主要由稳压电源、前置放大器、功率放大器、波形变换电路共4个部分构成，电路结构简单，所选器件价格便宜，并给出了测试结果。实验结果表明该功率放大器在带宽、失真度、效率等方面具有较好的指标、较高的实用性，为功率放大器的设计提供了广阔的思路。 关键词 功率放大器；失真度；带宽 Abstract current, although the integrated circuit technology has made the considerable progress, but the volume slightly is restricting its development with the power loss big contradiction. The high efficiency amplifier still had to use the discrete component the power triode to enlarge the electric circuit. The power amplifier not merely is expends the product (sound) center the essential equipment, but also widely applies in the control system and the measurement system. The low frequency power amplifier was a technology already the quite mature domain, several dozens years board people have made the unremitting effort for it, regardless of from the line technology or the primary device aspect, and even in the ideological recognition has all made the considerable progress. This article introduced the manufacture has the small signal magnifying power the low frequency power amplifier basic principle, the content, is the introduction manufacture has the small signal magnifying power the low frequency power amplifier basic principle, the content, the technology, the route. Entire electric circuit mainly by voltage-stabilized source, pre-amplifier, power amplifier, profile transfer network altogether 4 partial constitutions, electric circuit structure simple, chooses the component price to be cheap, and has produced the test result. The experimental result indicated this power amplifier in aspect and so on band width, degree of distortion, efficiency has a better target, a higher usability, has provided the broad mentality Key words power amplifier degree of distortion belt 目 录 摘 要 I Abstract II第1章 绪论 1 1.1 课题背景 1 1.2 课题