城市轨道交通电工电子技术单元8集成运算放大器及其应用

1、 输入级输入级中间级中间级偏置偏置 电路电路输出级输出级输入端输入端输出端输出端集成运放的组成框图集成运放的组成框图uoo-UoM uuui+UoMu-uo +-u+i+i-idid, 0uuriir 虚断虚断0,ooioo AuuuuuA为有限值，为有限值， uu虚短虚短ooM当时 , uuuU ooM当时 , uuuU i1uiuo +-ifR1R2RFi+i- ifuRRu10i1uiuo +-ifR1R2RF0ii 1if，(1)uuii iuuu 由虚短得，由虚短得，1f11FFoioi，uuuuuuiiRRRR o1Fi(1)RuuR i1uiuo +-ifR1R2RFuiuo +

2、-RRR1R2RFuiuo +-oF1i若0,则RRuu 0ii1112f0，(1)uiii 0uu1112f1112 oi1i2F,(2)uuuiiiRRR o1112FFi1i2()RRuuuRR 1112若，RRRoFi1i2则()RuuuR oFi1i2若， 则()RRuuu uoi13ui3 +-ifR13R2RFi12R12i11R11ui2ui1FFFoi1i2i3111213()RRRuuuuRRR 111213若,RRRRoFi1i2i3则()RuuuuR oFi1i2i3若,则()RRuuuu F1312112/RRRRR 要求要求oi1i2i3(420.5)uuuu ，F

3、100kR uoi13ui3 +-ifR13R2Rfi12R12i11R11ui2ui1FFFoi1i2i3111213()RRRuuuuRRR F13100200k0.50.5RR 2111213F/13.3kRRRRR F1210050k22RRF1110025k44RR 可得可得 ui1uo +-R3R2RFi1R1ifui232F1/RRRR 要求要求0iii1of11FuuiiRR 3322iRRRuu i1oi111i111Fuuuui RuRRR uu由虚短得由虚短得1iF2i323F)1(uRRuRRRRRu11o ui1uo +-R3R2RFi1R1ifui2)(,1i2iF

4、3F21uuRRuRRRR 1o则则时时且且当当o1F12F3i2i1当时 ,则()RRRRRuuuR uiuo +-R2CFi1R1ifuc0ii1f0，uii 0uu由虚短得，1iRuii 1f dtuCRdtiCuuiF1fF11couiuo +-R2CFi1R1ifuctCRUuF1i ouiUi-Uiot+UoM-UoMotuouiuo +- RbCi1ifucR10ii 1f0，uii 0uu由虚短得，ci1duduiCCdtdtof1i111duui Ri RR Cdt uiuo +- RbCi1ifucR1isinut ocossin90uRCtRCt tui0tuo02.2.方波发生器方波发生器 四四. RC. RC桥式正弦波振荡器桥式正弦波振荡器 1. 正弦波振荡电路的构成Rf 2 R1即可。2.2.正弦波振荡电路的应用正弦波振荡电路的应用 积分电