current buffer

Hi all, For a project I need to build a capacitor amplifier, with current boosting, so that rather large currents can flow without the OPAMPS saturating, as the resistance of the circuit is rather low normally, around a few Ohms. The measuring circuit is the following: The R13 resistor is in...

I need an SMD current buffer (low Zin<=100ohm, high Zout>=1Meg) to drive a 100Kohm electrode supplied by a very low output impedance current DAC(this DAC i cannot access and redesign). Unfortunately, I couldn't find any in the market. Does anyone have experience with any current buffer IC to...