功率放大器英文文獻(xiàn)翻譯及參考文獻(xiàn)英語(yǔ)論文

1、功率放大器英文文獻(xiàn)翻譯及參考文獻(xiàn)-英語(yǔ)論文功率放大器英文文獻(xiàn)翻譯及參考文獻(xiàn)參考文獻(xiàn)1 劉樹林.低頻電子線路.電子工業(yè)出版社,2003: 78-802 劉維恒.實(shí)用電子電路基礎(chǔ).電子工業(yè)出版社,2004: 69-71 3 劉鎮(zhèn)賓.音像技術(shù).機(jī)械工業(yè)出版社,2005: 54-574 謝自美.電子線路設(shè)計(jì)、實(shí)驗(yàn)、測(cè)試.華中理工大學(xué)出版社,2000: 107-1115 楊素行.模擬電子技術(shù)基礎(chǔ).高等教育出版社,2005: 212-2206 賈書圣.模擬電子線路（線性部分）.北京理工大學(xué)出版社,1996: 81-847 成 立.電子技術(shù).北京理工大學(xué)出版社,2000: 91-958 王賀明.王成安.模擬

2、電子技術(shù).大連理工大學(xué)出版社,2003: 74-779 蔡惟錚.電子技術(shù)基礎(chǔ)試題精選與答題技巧.哈爾濱工業(yè)大學(xué)出版社,2000: 95-10110 郭培源.電子電路及電子器件.高等教育出版社,2004: 65-6911 何小艇.電子系統(tǒng)設(shè)計(jì).杭州浙江大學(xué)出版社,2004: 70-8012 王武江.陳樹凱.常用集成電路速查手冊(cè).冶金工業(yè)出版社, 2004: 105-110附錄1 英文譯文本文源自六維論文網(wǎng)功率放大器原來(lái)只是以分立元件的形式組成電路，近年來(lái)，隨著科學(xué)技術(shù)的普及和文化水平的提高，功率放大器也有集成化產(chǎn)品，并在體育館、影劇場(chǎng)、歌舞廳、家庭中的hi-fi音樂(lè)欣賞、av系統(tǒng)放音、卡拉ok等

3、場(chǎng)合得到廣泛應(yīng)用。功率放大器是將音頻電壓信號(hào)放大到一定的功率并驅(qū)動(dòng)揚(yáng)聲器發(fā)聲的一種設(shè)備。功率放大器在擴(kuò)聲中起著極其重要的作用，如果沒(méi)有功率放大器揚(yáng)聲器就不能擴(kuò)聲。功率放大器是音響裝置的核心部分，無(wú)論是調(diào)諧器輸出的信號(hào)，還是話筒、錄音機(jī)、電唱機(jī)輸出的信號(hào)，都必須經(jīng)過(guò)功率放大器放大以后才能推動(dòng)音箱發(fā)出聲音。功率放大就是電壓放大，特點(diǎn)如推動(dòng)音頻的功放；高頻功率放大器如電視臺(tái)雷達(dá)發(fā)射的無(wú)線電微波。功率放大器的種類繁多，但不外乎分立電路、集成電路，隨著科學(xué)技術(shù)的發(fā)展，各種半導(dǎo)體器件的質(zhì)量和數(shù)量正不斷提高，應(yīng)用日益廣泛。由于集成功率放大器具有體積小，重量輕，成本低，安裝調(diào)試簡(jiǎn)單等優(yōu)點(diǎn)?，F(xiàn)在，集成功率放大器

4、已取代了由分立元件組成的功率放大器。如音頻功率放大器、射頻功率放大器、磁功放等。本文的功率放大器將采用集成功率放大器。目前隨著高保真立體聲技術(shù)的普及，許多功率放大器也應(yīng)用了高保真技術(shù)。高保真的意思是指音頻電聲系統(tǒng)及其設(shè)備或部件保持聲音信號(hào)原來(lái)面貌的能力。對(duì)于一般家庭音響裝置來(lái)說(shuō)只要低音渾厚、豐滿，中音堅(jiān)實(shí)、有力，高音清脆明亮，能夠使聽者感到滿意也就認(rèn)為達(dá)到高保真的要求了。人在講話的時(shí)候聲音的強(qiáng)度是很有限的，如果在一個(gè)有成千上萬(wàn)人的會(huì)場(chǎng)中，要使每一個(gè)人都能清楚地聽到是不可能的。利用功率放大器，人只要對(duì)著話筒講話，經(jīng)過(guò)功率放大器放大，再?gòu)膿P(yáng)聲器中發(fā)出很強(qiáng)的聲音，就可以使全會(huì)場(chǎng)的人都聽到。人講話的聲

5、音通過(guò)話筒變成了微弱的電信號(hào)，這一信號(hào)的電壓大小同聲音的強(qiáng)弱成正比，它的頻率同聲音的頻率相同，這種電信號(hào)叫做音頻信號(hào)。有話筒得到的音頻信號(hào)，電壓只有幾毫伏，功率放大器把這個(gè)微弱的音頻信號(hào)放大，從功率放大器輸出端可以輸出功率達(dá)幾瓦到幾十瓦，以至更大的音頻信號(hào)，推動(dòng)揚(yáng)聲器，發(fā)出強(qiáng)大的聲音。 在這一過(guò)程中，功率放大器的作用只是把音頻電信號(hào)進(jìn)行放大，所以功率放大器也就是音頻放大器。話筒能把聲音變成電信號(hào)；揚(yáng)聲器能把電信號(hào)變成聲音。我們把這類元件叫做電聲元件。功率放大器必須同電聲元件配合使用，才能發(fā)揮出它的作用。功率放大電路（簡(jiǎn)稱功率放大器）通常位于多級(jí)放大電路的最后一級(jí)，其任務(wù)是將前級(jí)電路放大后的電壓

6、信號(hào)再進(jìn)行功率放大，以足夠的輸出功率推動(dòng)執(zhí)行機(jī)構(gòu)工作，如揚(yáng)聲器發(fā)聲、電動(dòng)機(jī)旋轉(zhuǎn)、繼電器動(dòng)作、儀表指針偏轉(zhuǎn)本文源自六維論文網(wǎng)等。功率放大電路與電壓放大電路都屬于能量轉(zhuǎn)換電路，它們是將直流電源提供直流功率轉(zhuǎn)換成被放大信號(hào)的交流功率，從而起到功率和電壓放大的作用。但由于在多級(jí)放大電路中所處的位置不同，它們各自的功能是不同的：處于前置級(jí)的電壓放大電路的任務(wù)是將輸入的微弱信號(hào)識(shí)別出來(lái)并加以有效的放大，大多工作在低電壓、小電流、低噪聲的條件下，研究的主要指標(biāo)是電壓放大倍數(shù)、輸入電阻、輸出電阻、信噪比、頻率特性等，它們工作時(shí)，本身消耗的功率不大，向下一級(jí)輸出的主要是電壓信號(hào)。1363功率放大器英文文獻(xiàn)翻譯及

7、參考文獻(xiàn)the power amplifier is only originally by the discrete component form composition electric circuit, in recent years, along with the science and technology popularization and the cultural level enhancement, the power amplifier also had the integrated product, and in the stadium, the shade theater

8、, the song ballroom, the family hi-fi music appreciation, av situations and so on system playback, kara ok obtained the widespread application. the power amplifier is enlarges the audio frequency voltage signal to certain power and actuates the speaker sound production one kind of equipment.the powe

9、r amplifier is playing the extremely vital role in the sound amplification, if does not have the power amplifier speaker not to be able to amplify sound.the power amplifier is the acoustics core part, regardless of is the tuner output signal, the microphone, the tape recorder, the record player outp

10、ut the signal, will all have to enlarge later after the power amplifier to be able to impel the sound box to make the sound.the power enlarges is the voltage amplification, the characteristic is may lead the big load, in other words, may output the big electric current.may divide into the low freque

11、ncy power amplifier and the high frequency power amplifier according to the bandwidth.the low frequency power amplifier like impetus audio frequency merit puts; the high frequency power amplifier like television station radar launches radio microwave.the power amplifier type is many, but nothing els

12、e but establishes separately the electric circuit, the integrated circuit, along with thelow, installs the debugging simply and so on the merits.now, the integration power amplifier has substituted for the power amplifier which is composed by the discrete component.if the audio power amplifier, the

13、radio frequency power amplifier, magnetism merit put and so on. this article power amplifier will use the integration power amplifier.at present along with the high fidelity three-dimensional audio technology popularization, many power amplifiers also has applied the high fidelity technology.the hig

14、h fidelity meaning is refers to the audio frequency electro-acoustic system and the equipment or the part maintains the sound signal original appearance ability.regarding the general family acoustics so long as the bass is vigorous, is plentiful, the tenor is solid, is powerful, treble clear bright,

15、 can make the listener to be satisfied also thought achieved the high fidelity the request.person at talk of time the strength of the voice be very limited, if make in a the assembly hall which have a thousands person the each persons ability clearly hear is impossible.make use of power enlarger, pe

16、rson as long as toward a words tube to talk, through power enlarger enlarge, send out from the loudspeaker again very strong of voice, can make the person of whole assembly hall all hear.the voice that the person talk became weak through a words tube of telecommunication number, the electric voltage

17、 size of this signal together voice of strong or weak become direct proportion, it of frequency together voice of frequency homology, this kind of telecommunication number be called audio frequency signal.there is the audio frequency signal that the words tube get, the electric voltage only have sev

18、eral milli- fu, power enlarger this weak of the audio frequency signal enlarge, from the power enlarger output carry can output the power reach several tile to several ten tiles, with go to larger audio frequency signal, push loudspeaker, send out strong of voice. in this process, the function of po

19、wer enlarger is to carry on audio frequency telecommunication number to enlarge, so the power enlarger be also an audio frequency enlarger.the words tube can become the telecommunication number to the voice;the loudspeaker can become the voice to the telecommunication number.we are called the electr

20、icity voice to this component component.power enlarger have to together electricity voice component match usage, then can exertive of function.the power enlarge electric circuit(brief name power enlarger) usually be located on many the class enlarge the last class of electric circuit, its mission is

21、 front the class electric circuit enlarge behind of electric voltage signal again carry on power to enlarge, with enough of output power push performance organization work, such as loudspeaker give out sound, the electric motor revolve, after electric appliances action, appearance the needle deflect

22、 etcthe power enlarge electric circuit and electric voltage to enlarge electric circuit to all belong to energy conversion electric circuit, they are to provide the direct current power the direct current power supply the conversion become is enlarged signal of exchanges power, have thus the function that power and electri