What is the operation band? The noise specification ?

Anyway the TI opa233 has a maximum input bias current of 0.2 nA. You can see if it fits.

http://www.ti.com/product/OPA2333/description

I was designing a circuit to sense tunnel current, the opa128m it has a input bias current of 75 fA

http://www.ti.com/lit/ds/symlink/opa128.pdf

What is your current source (photodiode, synapse current clamp, or?)?

Do you need down to DC response?

What signal bandwidth and/or measurment rate do you need?

Do you need differential or single ended input?

There are too many variables as yet undefined to be able to recommend a specific solution with any certainty it will be appropriate.

Quality of circuit implementation i.e. careful attention to the power rails, guarded input(s), PCB material and cleanliness, will all have an impact on the correct operation (or otherwise) too.

2 possible suggestions would be LT1112 and OPA333/2333. Both have low input bias currents. There may be a few other candidates but I have personally worked with these 2 devices, so I suggest these. Good luck.

  First, thank you al, for answering. I forgot to write that my bandwidt should be higher than 1 MHz. purpose of circuit is detecting current change inside of neon lamp. Neon lamp is biased by DC voltage and 1 MHz modulated wave incident on lamp. I shold detect ac signal only.

Get inspired Annex

Don't forget that when biased "properly" neon type lamps can inadvertently turn out to be gamma ray detectors as I discovered when testing out a IN-9 bargraph tube.

I added the LED for better visibility, it could be an opto isolator to a counter stage or processor.