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带偏流补偿的宽带放大电路

2017-10-10 11:29

關(guān)鍵詞：放大电路电路带偏流补偿

帶偏流補(bǔ)償?shù)膶拵Х糯箅娐? src="http://files.chinaaet.com/dianlutu/90/490-1.jpg" style="cursor:hand" border=0>

圖(a)所示電路與一般反相放大電路的不同點(diǎn)僅在于反饋電阻輸入端點(diǎn)與反相輸入端之間串接了一個(gè)100kΩ的電位器，用于對(duì)直流偏流進(jìn)行補(bǔ)償。調(diào)整電位器Rp，使當(dāng)Vi=0V時(shí)，Vo=0。在補(bǔ)償端引腳1與10之間接相位補(bǔ)償電容C1(90pF)，引腳5到地的濾波電容C2也為90pF。該電路在圖示參數(shù)下的電壓放大倍數(shù)為：Av=-10，其電壓轉(zhuǎn)換速度大于70v／μs，半功率帶寬可達(dá)400kHz以上，其增益帶寬之積約為30MHz。采用10引腳的金屬圓形封裝的LH0003工作溫度為0～85℃，存儲(chǔ)溫度為-65～150℃。當(dāng)采用LH0003芯片時(shí)，其工作溫度為-55～125℃，存儲(chǔ)溫度為-65～150℃。圖(b)為L(zhǎng)H0003/LH0003C集成芯片管腳排列圖。

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