I have a high impedance differential sensor (stable 600k impedance Rth, 10mV signal, Fout=1kHz). I need to amplify this signal to about 1V (40dB gain). Due to layout/system constraints only the TLV9061 OpAmp stage can be used. Any suggestions on what topology would enable this? The problem I run into is that any difference amplifier or transimpedence amplifier needs feedback resistors that are unreasonably high (10s or 100s of Megohm) for a real world implementation.
I was looking into T-Network solutions as in this thread but it seems they suffer from high current noise.
Looking for any advice on other topologies to explore or methods to consider. Thanks!