lastfreename
Newbie level 4

Hi everybody!
I want to build a processing circuit for two-dimensional position sensitive detectors (in my case type Hamamatsu S5990-01). With the spot intensity I use, the PSD delivers signals I1-I4 in the order of 20-40mV.
The evaluation board should deliver the following outputs:
x-coordinate of the spot along the active area of the PSD:
amp_factor * [ I1+I2 - (I3+I4) / (I1+I2+I3+I4) ]
and similarly for the y-coordinate:
amp_factor * [ I2+I3 - (I1+I4) / (I1+I2+I3+I4) ]
Furthermore, the circuit should operate a at least 120kHz, which is probably not easy because of the analog division by the sum of the four signals. (.../(I1+I2+I3+I4)).
Has anyone of you done something like this before and could help me with the design and the choice of the right components?
Thanks a lot!
I want to build a processing circuit for two-dimensional position sensitive detectors (in my case type Hamamatsu S5990-01). With the spot intensity I use, the PSD delivers signals I1-I4 in the order of 20-40mV.
The evaluation board should deliver the following outputs:
x-coordinate of the spot along the active area of the PSD:
amp_factor * [ I1+I2 - (I3+I4) / (I1+I2+I3+I4) ]
and similarly for the y-coordinate:
amp_factor * [ I2+I3 - (I1+I4) / (I1+I2+I3+I4) ]
Furthermore, the circuit should operate a at least 120kHz, which is probably not easy because of the analog division by the sum of the four signals. (.../(I1+I2+I3+I4)).
Has anyone of you done something like this before and could help me with the design and the choice of the right components?
Thanks a lot!