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1、習(xí)題本章習(xí)題中的集成運(yùn)放均為理想運(yùn)放。5.1分別選擇“反相”或“同相”填入下列各空內(nèi)。(1)比例運(yùn)算電路中集成運(yùn)放反相輸入端為虛地,而比例運(yùn)算電路中集成運(yùn)放兩個(gè)輸入端的電位等于輸入電壓。(2)比例運(yùn)算電路的輸入電阻大,而比例運(yùn)算電路的輸入電阻小。(3)比例運(yùn)算電路的輸入電流等于零,而比例運(yùn)算電路的輸入電流等于流過(guò)反饋電阻中的電流。(4)比例運(yùn)算電路的比例系數(shù)大于1,而比例運(yùn)算電路的比例系數(shù)小于零。解:(1)反相,同相(2)同相,反相(3)同相,反相(4)同相,反相5.2填空:(1)運(yùn)算電路可實(shí)現(xiàn)Au>1的放大器。(2)運(yùn)算電路可實(shí)現(xiàn)Au<0的放大器。(3)運(yùn)算電路可將三角波電壓轉(zhuǎn)換成方波電壓。
2、(4)運(yùn)算電路可實(shí)現(xiàn)函數(shù)Y=aX1+bX2+cX3,a、b和c均大于零。(5)運(yùn)算電路可實(shí)現(xiàn)函數(shù)Y=aX1+bX2+cX3,a、b和c均小于零。(6)運(yùn)算電路可實(shí)現(xiàn)函數(shù)Y=aX2。解:(1)同相比例(2)反相比例(3)微分(4)同相求和(5)反相求和(6)乘方officiallyestablishedonJuly1,2013,Yibincity,formerlyknownasthebus,integratedoriginalrongzhoubuscompanyinYibincityandMetrobuscompany,formedonlyinYibincityofaState-ownedpub
3、lictransportenterprises,thecompanyconsistsofoneortwo,thirdDivision.Integrationofpublictransportservicesisnotyetestablished第五章題解-135.3電路如圖P5.3所示,集成運(yùn)放輸出電壓的最大幅值為±14V,填表。圖P5.3uI/V0.10.51.01.5uO1/VuO2/V解:uO1=(-Rf/R)uI=-10uI,uO2=(1+Rf/R)uI=11uI。當(dāng)集成運(yùn)放工作到非線性區(qū)時(shí),輸出電壓不是+14V,就是-14V。uI/V0.10.51.01.5uO1/V-1-5-10-
4、14uO2/V1.15.511145.4設(shè)計(jì)一個(gè)比例運(yùn)算電路,要求輸入電阻Ri=20kΩ,比例系數(shù)為-100。解:可采用反相比例運(yùn)算電路,電路形式如圖P5.3(a)所示。R=20kΩ,Rf=2MΩ。5.5電路如圖P5.5所示,試求:(1)輸入電阻;(2)比例系數(shù)。解:由圖可知Ri=50kΩ,uM=-2uI。即輸出電壓圖P5.5officiallyestablishedonJuly1,2013,Yibincity,formerlyknownasthebus,integratedoriginalrongzhoubuscompanyinYibincityandMetrobuscompany,form
5、edonlyinYibincityofaState-ownedpublictransportenterprises,thecompanyconsistsofoneortwo,thirdDivision.Integrationofpublictransportservicesisnotyetestablished第五章題解-135.6電路如圖P5.5所示,集成運(yùn)放輸出電壓的最大幅值為±14V,uI為2V的直流信號(hào)。分別求出下列各種情況下的輸出電壓。(1)R2短路;(2)R3短路;(3)R4短路;(4)R4斷路。解:(1)(2)(3)電路無(wú)反饋,uO=-14V(4)5.7電路如圖P5.7所示,T1
6、、T2和T3的特性完全相同,填空:(1)I1≈mA,I2≈mA;(2)若I3≈0.2mA,則R3≈kΩ。圖P5.7解:(1)1,0.4;(2)10。officiallyestablishedonJuly1,2013,Yibincity,formerlyknownasthebus,integratedoriginalrongzhoubuscompanyinYibincityandMetrobuscompany,formedonlyinYibincityofaState-ownedpublictransportenterprises,thecompanyconsistsofoneortwo,thi
7、rdDivision.Integrationofpublictransportservicesisnotyetestablished第五章題解-135.8試求圖P5.8所示各電路輸出電壓與輸入電壓的運(yùn)算關(guān)系式。圖P5.8解:在圖示各電路中,集成運(yùn)放的同相輸入端和反相輸入端所接總電阻均相等。各電路的運(yùn)算關(guān)系式分析如下:(a)(b)(c)(d)5.9在圖P5.8所示各電路中,是否對(duì)集成運(yùn)放的共模抑制比