例题2. Rf=10k , RF=20k , ui =-1V。求:uo ,RP 应为多大? iF RF if
ui
Rf RP
_ + +
uo
Au=1+
RFRf
=1+20/10=3
uo= Au ui=(3)(-1)=-3VRP=Rf//RF =10//20=6.7 k 6
例题2. Rf=10k , RF=20k , ui =-1V。求:uo ,RP 应为多大? iF RF if
ui
Rf RP
_ + +
uo
Au=1+
RFRf
=1+20/10=3
uo= Au ui=(3)(-1)=-3VRP=Rf//RF =10//20=6.7 k 6