Hi everyone. I have a photodetector in photoconductive mode with an amplifier. It works great, except when I leave it open in the room or shine light into it it doesn't go all the way to 0V, it only drops to 700mV. I need for it to drop to 0V for the rest of my circuit to work. I actually have an LED pulsing into the detector, so each time the LED lights up the voltage drops to 700mV, not 0V. Is there some kind of pulldown network I can add to this circuit to ensure that it will always go to 0V when light hits it? Thanks for any help/ideas.