畢業(yè)設(shè)計(jì)（論文）—高保真音響設(shè)計(jì)制作

1、編號(hào)： 畢業(yè)設(shè)計(jì)(論文)說(shuō)明書(shū)題 目： 高保真音響設(shè)計(jì)制作 院 （系）： 計(jì)算機(jī)系 專 業(yè)： 自動(dòng)化 學(xué)生姓名： 學(xué) 號(hào)： 指導(dǎo)教師： 職 稱： 題目類型： 理論研究 實(shí)驗(yàn)研究 工程設(shè)計(jì) 工程技術(shù)研究 軟件開(kāi)發(fā) 年 月 日摘 要隨著國(guó)家經(jīng)濟(jì)蒸蒸日上，現(xiàn)代科技不斷發(fā)展，這些使人們?cè)谖镔|(zhì)享受之余，也有了更多的精神享受的需要。其中之一：音樂(lè)，便是一種古老的享受形式。而高保真音響就是欣賞音樂(lè)的物質(zhì)基礎(chǔ)。本論文將以性價(jià)比為導(dǎo)向，兼顧基本的高保真的技術(shù)指標(biāo)，討論了適合初級(jí)發(fā)燒友的高保真功放。論文由淺至深，結(jié)合圖示給出了高保真音響的相關(guān)知識(shí)，以及整個(gè)功放的工作過(guò)程的細(xì)節(jié)。同時(shí)還介紹了各個(gè)主要芯片自身的特點(diǎn)及

2、如何去設(shè)計(jì)這個(gè)系統(tǒng)來(lái)滿足一定的技術(shù)指標(biāo)。論文盡可能通俗地來(lái)介紹高保真音響，讓大家能從中學(xué)到基本的高保真音響的知識(shí)的同時(shí)，還能學(xué)會(huì)如何制作高保真音頻放大器。在技術(shù)層面上，系統(tǒng)主要是采用集成芯片來(lái)完成的，因此對(duì)于一個(gè)初級(jí)發(fā)燒友來(lái)說(shuō)相對(duì)簡(jiǎn)單，這個(gè)設(shè)計(jì)中用到了NE5532(曾經(jīng)的“運(yùn)放之皇”)做前置放大芯片，典型的增益為20dB；用NSC公司的LM1036做音調(diào)芯片，通過(guò)改變直流控制電壓來(lái)實(shí)現(xiàn)音調(diào)控制。后級(jí)功率放大部分用的也是NSC公司的一款經(jīng)典芯片LM1875芯片，用4片LM1875駁接成了左右聲道的BTL電路,以取得更大的功率以及更好的音效。在論文的后面部分，著重的講述了制作和調(diào)試中遇到的軟件、硬

3、件上的問(wèn)題以及如何解決，并給出了高保真音頻放大器性能指標(biāo)的國(guó)家標(biāo)準(zhǔn)測(cè)量方法。這些可以成為大家制作過(guò)程中的一些的提示以及測(cè)試的依據(jù)。關(guān)鍵詞：高保真；集成芯片；BTL；音調(diào)控制AbstractWith the development of our countrys economy and the modern technology. People no longer just enjoy the happy brought from material, they also learned to enjoy the spiritual things. For instance: Music, an

4、old fashion of the enjoyments. And Hi-Fi(high fidelity) audio system is the very suitable intermedia for enjoying music.So this dissertation focused on the Hi-Fi amplifiers for those primary audiophiles on this field. It tried to let people cost less and at the same moment , get enough enjoyment fro

5、m Hi-Fi amplifiers and satisfy those basic standards of Hi-Fi system. This dissertation presented the ideas from easy to hard, and described the relative knowledge of the Hi-Fi audio system with those graphics and diagrams. It also wrote about the details of the whole working process of this design

6、gradually. This dissertation also introduced those characteristics of those chips used in my design, and how to realize those systems targets given .The dissertation tried to introduce Hi-Fi audio system commonly,and let you learn some basic knowledge of this Hi-Fi system, at the same time , eventua

7、lly learn how to accomplish a Hi-Fi audio amplifier.Refer to the technology, IC was used to finish this graduate design, because it's relatively easier for primary audiophiles to design a audio amplifier. The pre-amp is NE5532, which was ever called as "The KING of amplifiers" ,and its

8、 typical gain is 20dB;LM1036 produced by NSC(National Semiconductor Company) was used here for tone adjustment IC. And LM1036s tone control can be controlled by changing the DC control voltage. The second amplifier IC is LM1875, also made by NSC. It is very classical . Four LM1875 chips were used to

9、 make a BTL(Balanced Transformer Less) circuit of each channel to achieve more power and to make the whole systems timbre to be better.The last paragraph of this dissertation, I mainly introduce some software and hardware problems I met during making the board and debugging, and how I solved those p

10、roblems. Also I presented you the national standard test methods for audio amplifier characteristics. Hope these can be your hints and help during your executing for audio amplifier.Key words: Hi-Fi; Integrated Circuit; BTL; Tone control目 錄引言11 高保真音響系統(tǒng)11.1 高保真音響系統(tǒng)定義11.2 高保真音響系統(tǒng)組成22 高保真功率放大器32.1 功率放大

11、器種類32.2 高保真功率放大器主要技術(shù)指標(biāo)43 功放電源83.1 功放電源概述83.2 功放電源組成83.3 整流濾波電路103.4 穩(wěn)壓電路134 方案論證及闡述144.1 設(shè)計(jì)要求144.2 方案論證14后級(jí)放大器方案選定14前置放大器方案選定14音調(diào)芯片方案選定15電源方案選定154.3 具體方案闡述15前級(jí)放大器方案闡述15后級(jí)放大器方案闡述19功放電源方案闡述225 高保真功放制板235.1 制板注意事項(xiàng)235.2 制板經(jīng)驗(yàn)總結(jié)24制板步驟24的使用經(jīng)驗(yàn)總結(jié)25制板遇到的問(wèn)題266 功放調(diào)試266.1 調(diào)試步驟276.2 模塊調(diào)試27電源調(diào)試27.2音調(diào)模塊調(diào)試276.2.3前置放大模塊調(diào)試286