Integrator 303 may be an analog circuit, or {HEAD ~ the integration} may be performed digitally by {TAIL ~ camera logic} 110 
performed digitally by
Integrator 303 may be an analog circuit , or { HEAD ~ the integration } may be performed digitally by { TAIL ~ camera logic } 110
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH