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I can see: Ic2A Pin1 is V1=Vref-Id*R25

where Vref = Vcc*R24/(R24+R23)

Id is the current flow through the D6 which is a photodiode.

Question is: How to calculate the final output of Ic2B Pin7

  • 1
    \$\begingroup\$ You can't calculate it because IC2B is used as an integrator and it's probably in some feedback system of which your circuit doesn't provide information on. \$\endgroup\$
    – Andy aka
    Jul 1, 2020 at 12:36
  • \$\begingroup\$ I don't think so.even as an intergrator there is a formula which can describe the relatioship between the input and the output \$\endgroup\$
    – lukeluck
    Jul 2, 2020 at 0:51


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