Refering to the schematic from gyraf's page there are two diodes (bav103) at the input differential stage. I think I understand the other parts of the schematic but I have no clue why these diodes are there. They seem to clamp the differential stage's outputs to the following opamp against the negative rail if the output voltage falls below that rail voltage. But I can't see any way that happening.
So, what do they do?
Chris
So, what do they do?
Chris