High gain High bandwidth current amplifier

[amherstsean]

I'm doing a biology experiment with patch-clamp amplifier to measure the bio-signal.  Basically we need a current amplifer with a gain about 1pA/mV or 10^9 V/A. The bandwidth should be about 1MHz. We currently have the patch-clamp amplifier with this high gain but only has 100KHz bandwidth. Can anybody know how to improve this system? Or where can I buy such high bandwidth current amplifier? Thanks a log.

[AnalogKid2DigitalMan]

10^9 at 1MHz is quite a bit to ask.

Here's 10^7 at 1.8MHz:

http://www.femto.de/index.html?../products/lca.html

Maybe you could follow this unit with a wideband  voltage amplifier with a gain of 100 to complete your needs?

[amherstsean]

Thank you very much for suggestion. Will this combination of current amplifier+voltage amplifier be possible to achieve what I need with low noise?
I'm worrying too much noise that I can't filt out original signal.

[AnalogKid2DigitalMan]

You may want to contact Femto directly and discuss your application and noise requirements with them.

Proper detector and wiring shielding and grounding are important at achieving high gain/bandwith product with low noise.

Good Luck

-AK2DM