Hi Folks,
I have a Quad-photodetector and I want to amplify the signal of each quadrant independently but I need to guarantee the same gain for all of them.
I thought about using operational amplifier for each quadrant but I know that the gain is dependant on the resistance values which has minor mismatches due to manufacturing process.
I also need to add and subtract the values after amplifications.
I found some components that can do so ex. LMH32404 and LTC6561. I am just wondering how they are implemented.
any hints how to guarantee a constant gain for each quadrant using onvthe shelf components ( op-amp, transistors, R, L , C,..etc) ?