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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僅在于反饋電阻輸入端點與反相輸入端之間串接了一個100kΩ的電位器，用于對直流偏流進(jìn)行補償。調(diào)整電位器Rp，使當(dāng)Vi=0V時，Vo=0。在補償端引腳1與10之間接相位補償電容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℃，存儲溫度為-65～150℃。當(dāng)采用LH0003芯片時，其工作溫度為-55～125℃，存儲溫度為-65～150℃。圖(b)為LH0003/LH0003C集成芯片管腳排列圖。

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