【正文】
the most monly used to audio power amplifier, power output is more than 10 w, frequency response of 10 ~ 1400 hz ac, output current peak value maximum can reach A, the internal circuit includes input level, middle level and output level, and short circuit protection and overheating protection, safe and reliable to ensure that the work of the circuit. Circuit adopts is single output power supply. The physical product using printed circuit board PCB manufacture (single panel) and the good performance meet the design requirements and appearance. Secondly, with multisim software simulation of OTL power amplifier. According to the example and has given the original parameters of the circuit, and use multisim software to simulate the circuit, and carries on the static analysis, dynamic analysis, show that wave diagram, design and calculation data, etc to acplish achieve the whole process of OTL power amplifier. 目錄第一章 前言 .............................................................1第二章 OTL 功率放大器設(shè)計(jì) ...............................................2第一節(jié)設(shè)計(jì)思路 ......................................................2第二節(jié) 設(shè)計(jì)方案 .....................................................2第三節(jié) OTL 功放各級(jí)的作用和電路結(jié)構(gòu)特征 .............................3第四節(jié) 簡(jiǎn)要原理分析 .................................................4第三章 選擇器件及參數(shù)計(jì)算 ...............................................6第一節(jié) 功率放大器芯片 TDA2030 介紹 ...................................6第 二 節(jié) 參 數(shù) 及 功 率 、 效 率 的 計(jì) 算 ............................................8參數(shù)計(jì)算 ............................................................8功率和效率的計(jì)算 ....................................................8第四章 實(shí)物電路安裝調(diào)試及使用 ..........................................11第一節(jié) 元件的安裝 ..................................................11第二節(jié) 電路調(diào)整與測(cè)試 ..............................................11通電前調(diào)試 .........................................................11元件的調(diào)試 .........................................................12第五章 總結(jié) ............................................................15第六章 參考文獻(xiàn) ........................................................16第一章 前言O(shè)TLOutput Transformerless 電路是單端推挽式無(wú)輸出變壓器功率放大電路。通常采用單電源供電,從兩組串聯(lián)的輸出中點(diǎn)通過(guò)電容耦合輸出信號(hào)。過(guò)去大功率的功率放大器多采用變壓耦合方式,已解決阻抗變換問(wèn)題,使電路得到最佳負(fù)值。但是這種電路有體積大、笨重、頻率特性不好等缺點(diǎn),目前已較少使用。OTL 電路不再用輸出變壓器,而采用輸出電容與負(fù)載連接的互補(bǔ)對(duì)稱功率放大電路,使電路輕便、適于電路的集成化,只要輸出電容的容量足夠大,電路的頻率特性也能保證。是目前常用的一種功率放大電路。 OTL 功放的特點(diǎn)是:采用互補(bǔ)對(duì)稱電路(NPN、PNP 參數(shù)一致、互補(bǔ)對(duì)稱,均為射隨組態(tài),串聯(lián),中間兩管子的射極作為輸出) ,有輸出電容,單電源供電,電路輕便可靠。 “兩組串聯(lián)的輸出終點(diǎn)”可理解為采用互補(bǔ)對(duì)稱電路,OTL 電路的優(yōu)點(diǎn)是只需要一組電源供電。缺點(diǎn)是需要把一組電源變成兩組對(duì)稱正、負(fù)電源的單電源大電容,低頻特性差。第二章 OTL 功率放大器設(shè)計(jì)第一節(jié) 設(shè)計(jì)思路