S
[email protected]
- Jan 1, 1970
- 0
I don't find correct Req value in this opamp configuration:
http://img46.imageshack.us/img46/1848/opampnr3.png
If i don't consider Ib and define:
1)Va=voltage across R2
2)eo=Ip*Req
Va=RfT*Ip=(R2/(R2+R1))eo, so e0=Ip*(RfT*(1+R1/R2))
This result is right if Rft>>R1, but in general Req=Rft+R1+(Rft*R1)/
R2: so it is wrong...can you help me?
I have another question:i'm looking for a good book about systematic
methods for the study of networks with active and passive
components...i'm looking for a book that give to me ability of analyze
electrical circuits in simple and quickly way...
Thanks
http://img46.imageshack.us/img46/1848/opampnr3.png
If i don't consider Ib and define:
1)Va=voltage across R2
2)eo=Ip*Req
Va=RfT*Ip=(R2/(R2+R1))eo, so e0=Ip*(RfT*(1+R1/R2))
This result is right if Rft>>R1, but in general Req=Rft+R1+(Rft*R1)/
R2: so it is wrong...can you help me?
I have another question:i'm looking for a good book about systematic
methods for the study of networks with active and passive
components...i'm looking for a book that give to me ability of analyze
electrical circuits in simple and quickly way...
Thanks