Anode 60 of photodiode 58 is common with {HEAD ~ inverting terminal} 74 of {TAIL ~ op amp} 70 
of
Anode 60 of photodiode 58 is common with { HEAD ~ inverting terminal } 74 of { TAIL ~ op amp } 70
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH