電子放大器是能把輸入訊號的電壓或功率放大的裝(zhuang)置(zhi),由電子管或晶體管、電源變壓器和其他電器(qi)元件組成(cheng)。用在通訊、廣播、雷達、電視、自動(dong)控制(zhi)等各種裝置中。放大(da)器(qi)的放大(da)作(zuo)用是用輸入信號控(kong)制能源來實現(xian)的,放大所(suo)需功耗由(you)能(neng)源提供。對于(yu)線性放大器,輸出就(jiu)是輸入信號(hao)(hao)的復現(xian)和增(zeng)強(qiang)。對于非線性放(fang)大器,輸出則與輸入信號(hao)(hao)成(cheng)一定函數關系。放(fang)大器按所處理信號(hao)(hao)物理量分為機(ji)(ji)械放(fang)大器、機(ji)(ji)電放大(da)器、電子放大(da)器、液(ye)動放大(da)器和氣動放大器等,其中用(yong)(yong)得較廣泛的是電子放(fang)大(da)(da)器(qi)。隨著射流(liu)技(ji)術(shu)(見射流(liu)元件)的推廣,液動(dong)或氣動(dong)放(fang)大(da)(da)器(qi)的應用(yong)(yong)也逐漸增多。電子放(fang)大(da)(da)器(qi)又按所用(yong)(yong)有源器件分(fen)為真(zhen)空(kong)管(guan)放(fang)大(da)器(qi)、晶體(ti)管(guan)放(fang)大(da)器(qi)、固(gu)體(ti)放(fang)大(da)器(qi)和磁放大器,其中(zhong)又(you)以晶(jing)體(ti)管放大器應用較廣。在自動化儀表中晶體管放(fang)大(da)器常用于信號的電(dian)壓放(fang)大(da)和電(dian)流放(fang)大(da),主(zhu)要(yao)形式有單端放大和(he)推挽(wan)放大。此外,還(huan)常(chang)用于阻抗匹配、隔(ge)離(li)、電(dian)(dian)流-電(dian)(dian)壓轉換、電(dian)(dian)荷-電(dian)(dian)壓轉換(如電荷放大器)以及(ji)利用放大(da)器(qi)實現輸出與輸入(ru)之(zhi)間的一定函數關系(如運(yun)算放大(da)器(qi))。 ATOS電子放大器E-ATR-7/100/I通常是由信號源、晶體三極管構成的放大器及負載組成。它是使用較為廣泛的電子電路之一、也是構成其他電子電路的基礎單元電路。所謂放大,就是將輸入的微弱信號(簡稱信號,指變化的電壓、電流等)放大到所需要的幅度值且與原輸入信號變化規律*的信號,即進行不失真的放大。只有在不失真的情況下放大才有意義。放大電路的本質是能量的控制和轉換,根據輸入回路和輸出回路的公共端不同,放大電路有三種基本形式:共射放大電路、共集放大電路和共基放大電路。 ATOS電子放大器E-ATR-7/100/I性能指標: 電(dian)(dian)壓放大倍數、輸(shu)入電(dian)(dian)阻和(he)輸(shu)出電(dian)(dian)阻是放大電(dian)(dian)路(lu)的三(san)個(ge)主要(yao)性能(neng)指標(biao),分析(xi)這三(san)個(ge)指標(biao)較常用的方法(fa)是微變(bian)等(deng)效電(dian)(dian)路(lu)法(fa),這是一(yi)種在小(xiao)信(xin)號放大條件下,將非(fei)線性的三(san)極(ji)管放大電(dian)(dian)路(lu)等(deng)效為線性放大電(dian)(dian)路(lu)。 放大(da)倍數放(fang)大(da)倍(bei)數又稱增益,它是衡(heng)量放(fang)大(da)電(dian)路(lu)放(fang)大(da)能力的指標。根據需要處理(li)的輸(shu)入(ru)和輸(shu)出量的不同,放(fang)大(da)倍(bei)數有(you)電(dian)壓、電(dian)流、互阻、互導和功率放(fang)大(da)倍(bei)數等(deng),其中(zhong)電(dian)壓放(fang)大(da)倍(bei)數應用最(zui)多(duo)。 輸入電阻(zu)放(fang)大(da)電(dian)路(lu)的(de)輸(shu)(shu)(shu)入(ru)(ru)電(dian)阻(zu)是(shi)從(cong)輸(shu)(shu)(shu)入(ru)(ru)端(duan)(duan)向放(fang)大(da)電(dian)路(lu)內看進去的(de)等(deng)效電(dian)阻(zu),它等(deng)于放(fang)大(da)電(dian)路(lu)輸(shu)(shu)(shu)出端(duan)(duan)接實際負載(zai)電(dian)阻(zu)后(hou),輸(shu)(shu)(shu)入(ru)(ru)電(dian)壓與輸(shu)(shu)(shu)入(ru)(ru)電(dian)流(liu)之比,即Ri=Ui/Ii。對于信號源來說,輸(shu)(shu)(shu)入(ru)(ru)電(dian)阻(zu)就是(shi)它的(de)等(deng)效負載(zai)。 輸(shu)(shu)(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)(dian)阻的(de)大(da)小(xiao)(xiao)反映(ying)了放大(da)電(dian)(dian)(dian)(dian)(dian)路對(dui)信(xin)號(hao)源的(de)影響(xiang)程度(du)。輸(shu)(shu)(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)(dian)阻越(yue)(yue)大(da),放大(da)電(dian)(dian)(dian)(dian)(dian)路從信(xin)號(hao)源汲取的(de)電(dian)(dian)(dian)(dian)(dian)流(即輸(shu)(shu)(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)(dian)流)就(jiu)(jiu)越(yue)(yue)小(xiao)(xiao),信(xin)號(hao)源內阻上的(de)壓(ya)(ya)(ya)(ya)降就(jiu)(jiu)越(yue)(yue)小(xiao)(xiao),其(qi)實(shi)際輸(shu)(shu)(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)就(jiu)(jiu)越(yue)(yue)接近于信(xin)號(hao)源電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya),常稱(cheng)為(wei)恒壓(ya)(ya)(ya)(ya)輸(shu)(shu)(shu)入(ru)(ru)。反之,當要(yao)求恒流輸(shu)(shu)(shu)入(ru)(ru)時,則(ze)必須使Ri<<Rs;若(ruo)要(yao)求獲得最大(da)功率輸(shu)(shu)(shu)入(ru)(ru),則(ze)要(yao)求Ri=Rs,常稱(cheng)為(wei)阻抗匹配(pei)。 輸(shu)出電(dian)阻對負載而言,放(fang)大(da)(da)電(dian)(dian)路的輸(shu)(shu)出(chu)端可(ke)等(deng)效為(wei)一個信號源。輸(shu)(shu)出(chu)電(dian)(dian)阻越(yue)小(xiao),輸(shu)(shu)出(chu)電(dian)(dian)壓受(shou)負載的影響就越(yue)小(xiao),若Ro=0,則輸(shu)(shu)出(chu)電(dian)(dian)壓的大(da)(da)小(xiao)將不受(shou)RL的大(da)(da)小(xiao)影響,稱為(wei)恒壓輸(shu)(shu)出(chu)。當RL<<Ro時即可(ke)得到恒流輸(shu)(shu)出(chu)。因此,輸(shu)(shu)出(chu)電(dian)(dian)阻的大(da)(da)小(xiao)反映了放(fang)大(da)(da)電(dian)(dian)路帶負載能(neng)力(li)的大(da)(da)小(xiao)。 ATOS電子放大器E-ATR-7/100/I維特銳有現貨訂貨就找上海維特銳,公司作為Atos上海供貨商,為全國單位供應阿托斯全系列液壓閥、泵、放大器、繼電器等產品。阿托斯直銷貨源,上海維特銳17年經驗,值得信賴。 ATOS電子放大器現貨型號: E-MI-AC-01 E-MI-AC-01F E-MI-AC-01F 11 /1 E-MI-AC-01F 11 /2 E-MI-AC-01F 11 /3 E-MI-AC-01F 11 /4 E-MI-AC-01F 11 /6 E-MI-AC-01F 20 /1 E-MI-AC-01F 20 /2 E-MI-AC-01F 20 /3 E-MI-AC-01F 20 /6 E-MI-AC-01F E-MI-AC-01F/7 11 /3 E-RI-TE-01H 40 E-RI-TE-05H 40 E-RP-AC-01F/I 10 /A1 E-RP-AC-05F 10 /4 BM-AC-011F/I E-BM-AC-011F E-BM-AC-01F 11 /2 E-BM-AC-01F 11 /3 E-BM-AC-01F/RR 11 /A1 E-BM-AC-05F 11 /3 E-BM-AC-05F 11 /4 E-BM-AC-05F/RR 11 /3 E-ME-AC-01F 20 E-ME-AC-01F 20 /1 E-ME-AC-01F 20 /2 E-RI-TE-01H 40 /DH04SA E-RI-TE-01H/I 40 /DH04SA E-RI-TE-05H 40 /DK17SB E-RP-AC-01F/I 10 /2 E-RP-AC-01F/I 10 /A1 E-RP-AC-05F 10 /4 此信息版權歸上海維特銳所有,如需了解更多詳情,請點擊:意大利ATOS阿托斯 |