If i consider an opamp in corrent-to-voltage configuration with:
-ideal generetor current in inverting input
-non inverting input to ground
-feedback resistance equal to 100Mohm
-open loop gain egual to A=128dB
-capacitance common mode plus differential mode equal to 3pf
i'm looking for pole frequency that shoud be equal to A0/(2*pi*C*Rf)
120dB=20LogA0=>A0=2.512e6
fp=2e6/(2*pi*3e-12*100e6)
but this frequency is too high for this opamp (http://focus.ti.com/
docs/prod/folders/print/opa128.html) , so i think that i've made some
errors...what's wrong?
