I don't find correct Req value in this opamp configuration:
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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