ATOS放(fang)大(da)器(qi)是(shi)一種具有(you)提高信號(hao)(hao)幅值和功率(lv)的裝置(zhi)，在自動(dong)化(hua)技(ji)術(shu)工具中是(shi)信號(hao)(hao)處理(li)的重要(yao)部件(jian)。通(tong)過輸進信號(hao)(hao)控制能量(liang)(liang)量(liang)(liang)來實(shi)現放(fang)大(da)功能，并(bing)通(tong)過能量(liang)(liang)量(liang)(liang)來實(shi)現放(fang)大(da)功能。對(dui)線性(xing)放(fang)大(da)器(qi)而言(yan)，輸出(chu)是(shi)對(dui)輸入量(liang)(liang)的再現和增強。對(dui)非線性(xing)放(fang)大(da)器(qi)來說，輸出(chu)與輸入量(liang)(liang)成一定的函數關系。

ATOS放大器實際上(shang)是(shi)(shi)一個模擬的傅(fu)立葉變換器，鎖相放大器的輸(shu)(shu)(shu)(shu)出是(shi)(shi)一個直流電壓，正比于是(shi)(shi)輸(shu)(shu)(shu)(shu)入(ru)信(xin)(xin)號中某一特定頻率（參數輸(shu)(shu)(shu)(shu)入(ru)頻率）的信(xin)(xin)號幅值(zhi)。而輸(shu)(shu)(shu)(shu)入(ru)信(xin)(xin)號中的其他頻率成(cheng)分將不能對輸(shu)(shu)(shu)(shu)出電壓構成(cheng)任(ren)何貢獻(xian)。

兩個正(zheng)弦信(xin)號，頻(pin)率都為1Hz，有90度相(xiang)位差(cha)，用乘(cheng)法(fa)器相(xiang)乘(cheng)得到的(de)結果是一(yi)個有直流偏(pian)量的(de)正(zheng)弦信(xin)號。

如(ru)果是一(yi)個1Hz和一(yi)個1.1Hz的(de)信號相(xiang)乘(cheng)，用乘(cheng)法器相(xiang)乘(cheng)得到的(de)結果是輪廓為(wei)正弦的(de)調制信號，直流偏量為(wei)0。

ATOS放大(da)器主要用途(tu):

ATOS放大器(qi)主要用(yong)于檢(jian)測(ce)信(xin)噪比很低的(de)(de)微弱信(xin)號(hao)。即(ji)使有(you)用(yong)的(de)(de)信(xin)號(hao)被淹沒在噪聲信(xin)號(hao)里面，即(ji)使噪聲信(xin)號(hao)比有(you)用(yong)的(de)(de)信(xin)號(hao)大很多，只要知道有(you)用(yong)的(de)(de)信(xin)號(hao)的(de)(de)頻率值(zhi)，就能準確(que)地測(ce)量出(chu)這(zhe)個信(xin)號(hao)的(de)(de)幅值(zhi)。

ATOS高(gao)(gao)頻(pin)功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)器(qi)(qi)是通(tong)信系統(tong)中發(fa)送裝置的(de)重要組件(jian)。按其工作(zuo)(zuo)頻(pin)帶(dai)的(de)寬(kuan)窄(zhai)劃分(fen)為窄(zhai)帶(dai)高(gao)(gao)頻(pin)功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)器(qi)(qi)和寬(kuan)帶(dai)高(gao)(gao)頻(pin)功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)器(qi)(qi)兩種(zhong)，窄(zhai)帶(dai)高(gao)(gao)頻(pin)功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)器(qi)(qi)通(tong)常以(yi)具(ju)有選(xuan)頻(pin)濾波(bo)作(zuo)(zuo)用(yong)的(de)選(xuan)頻(pin)電(dian)(dian)路(lu)(lu)(lu)作(zuo)(zuo)為輸(shu)(shu)出(chu)(chu)回路(lu)(lu)(lu)，故又(you)稱為調諧(xie)功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)器(qi)(qi)或(huo)諧(xie)振功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)器(qi)(qi)；寬(kuan)帶(dai)高(gao)(gao)頻(pin)功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)器(qi)(qi)的(de)輸(shu)(shu)出(chu)(chu)電(dian)(dian)路(lu)(lu)(lu)則是傳輸(shu)(shu)線(xian)變壓(ya)器(qi)(qi)或(huo)其他寬(kuan)帶(dai)匹配(pei)電(dian)(dian)路(lu)(lu)(lu)，因此又(you)稱為非調諧(xie)功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)器(qi)(qi)。高(gao)(gao)頻(pin)功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)器(qi)(qi)是一種(zhong)能(neng)量轉換器(qi)(qi)件(jian)，它將(jiang)電(dian)(dian)源供給的(de)直流(liu)能(neng)量轉換成為高(gao)(gao)頻(pin)交流(liu)輸(shu)(shu)出(chu)(chu)在“低頻(pin)電(dian)(dian)子(zi)線(xian)路(lu)(lu)(lu)"課程(cheng)中已知，放(fang)(fang)大(da)器(qi)(qi)可以(yi)按照電(dian)(dian)流(liu)導通(tong)角的(de)不(bu)同，將(jiang)其分(fen)為甲(jia)、乙、丙三類(lei)工作(zuo)(zuo)狀態。甲(jia)類(lei)放(fang)(fang)大(da)器(qi)(qi)電(dian)(dian)流(liu)的(de)流(liu)通(tong)角為360o，適用(yong)于小信號低功(gong)(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)。

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