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畢業(yè)設(shè)計--合并式功率放大器-全文預(yù)覽

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【正文】 位器 RP4 動臂滑到右端時,與上述情況相反,因而高音衰減最大。當(dāng)?shù)鸵綦娢黄?RP3 動臂滑到右端時,與 上述情況相反,因而低音衰減最大。 C3 和 C5 對低音頻信號視為開路, C4 對高音頻信號視為短路。 平衡控制:是立體聲前置放大器的特有裝置,用于調(diào)整左、右聲道的音量差別,以校正聆聽者偏離左、右音箱中線時的聲像偏離,或是校正左、右聲道的增益差。 音量控制電路: 用來調(diào)節(jié)輸入后級放大器的信號電平的大小,以便獲得不同的音量。 在音響系統(tǒng)中的前置放大器,是連接信號源與功放的樞紐和橋梁。因為功放機(jī)之所以要做成分體式,其主要的目的是防止音質(zhì)劣化。 電源電路原理圖 7 合并式功率放大器 前置放大器 我們知道在功放機(jī)中有控制放大器(又稱前置放大器),功率放大器和綜合放大器幾種,前置放大器主要的作用是對微弱信號進(jìn)行放大,同時還有切換信號和控制音量等功能,因此又稱控制放大器,而功率放大器(又稱后置放大器)的主要作用是供給揚(yáng)聲器工作時所需的功率。沒有穩(wěn)壓電路,因為功率放大電路對電壓的穩(wěn)定要求不高,所以就不用穩(wěn)壓電路。整流電路是利用二極管的單向?qū)?電特性,將正負(fù)交替的正統(tǒng)交流電壓變換成單向的脈動電壓。 3) 本設(shè)計所采用的是合并式功放,因為有以上的特點(diǎn),而且應(yīng)用也相當(dāng)?shù)膹V泛,所以就采用合并式功率放大器。后級的輸入訊號很單純,就是承接前級的輸出。當(dāng)然不管怎么變化,只要滿足合并式放大器的前三條就是合并式放大器。 功率放大器在國內(nèi)的研究現(xiàn)狀,從使用元件的角度來看,有電子管的功率放大器、晶體管功率放大器、場效應(yīng)管功率放大器、集成電路功率放大器等; 從電路結(jié)構(gòu)來看,現(xiàn)在普遍采用合并式電路。功率放大器是將音頻電壓信號轉(zhuǎn)化成音頻信號并驅(qū)動揚(yáng)聲器發(fā)聲的一種設(shè)備。因此功率放大器在公共場、家庭等都得到了廣泛的應(yīng)用,給許多音樂愛好者帶來了興趣,從而得到了更好的發(fā)展。用軟件對 OTL 功率放大器進(jìn)行仿真實(shí)現(xiàn)。設(shè)計完全符合要求 關(guān)鍵詞: 合并式 功率放大器 雙聲道 Combined type power amplifier Abstract Combined type power amplifier is the role of provides certain output to load RL, when RL is fixed, want to output power as high as possible, small nonlinear distortion of the output signal, and the efficiency is as high as possible. Because of the plicated circuit adopts a direct coupling mode, in order to guarantee the circuit work stable, effective measures must be taken to suppress the zero drift. In order to obtain the output 2 power is large enough to drive the load of work, so we need to have enough high voltage amplification factor. Therefore, the good performance of the bined type power amplifier by the input stage, promote the level and output level ponents. Audio power amplifier is a very mature technology field, Audio power amplifier is a very mature technology field, in the modern audio popularization, development and application of great. Audio power amplifier is not only consumer products (sound) equipment indispensable, but also widely used in the control system and the measurement the modern audio popularization, development and application of great. Audio power amplifier is not only consumer products (sound) equipment indispensable, but also widely used in the control system and the measurement system. This amplifier uses a typical OCL power amplifier, fullplementary symmetrical pure class a DC structure, power amplifiers are working at every level of magnification in a state. Input amplifier and voltage amplifier with better wall diffuse linear circuits, difference in charge and current drive pipe were very famous K170, J74 (K389, J109 twin tube on the power tube) and K214, J77 MOS, power output stage for 2SC5200 and 2SA1943 high power Toshiba tube parallel output, power strong, driving impedance 2 ohms speaker is relaxed, effortless. Comprehensive use of our previously learned knowledge. The design fully meets the requirements Key words: The bined type power amplifier dual track 3 引言 在現(xiàn)代音響普及中,人們因生活層次、文化習(xí)俗、音樂修養(yǎng)、欣賞口味的不同,令對相同電氣指標(biāo)的音響設(shè)備得出不同的評價。音頻功率放大器不僅僅是消費(fèi)產(chǎn)品(音響)中不可缺少的設(shè)備,還廣泛應(yīng)用于控制系統(tǒng)和測量系統(tǒng)中。 按照各級功能及技術(shù)要求,首先確定整機(jī)電路級數(shù)及電壓增益分配,而后分別選擇設(shè)計各級電路元器件及參數(shù)。 ....................................................... 7 .................................................... 10 .................................................. 14 ................................................ 15 .................................................... 20 ........................................................ 20 第三章 總 體仿真 ........................................................... 27 ............................................................ 27 ....................................................... 27 ................................................ 28 第四章 安裝與調(diào)試 ......................................................... 29 ...................................................... 29 ...................................................... 29 ........................................................ 29 總結(jié) ...................................................................... 30 致謝 ...................................................................... 31 參考文獻(xiàn) .................................................................. 32 附錄 ...................................................................... 33 1 合并式功率放大器 專業(yè)班級:電氣 101 學(xué)生姓名:張濤濤 指導(dǎo)教師:門宏職稱:教授 摘要 合并式 功 率放大器的作用是給負(fù)載 RL 提供一定的輸出功率,當(dāng) RL一定時,希望輸出功率盡可能大,輸出信號的非線性失真可能小,且效率盡可能高。 引言 ....................................................................... 3 第一章 設(shè)計方案 ............................................................ 4 ......................................................... 4 ................................................. 4 ........................................................ 5 第二章 電路設(shè)計 .............................
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