A floating gate is used to transfer {TAIL ~ the charge} from {HEAD ~ the photodiode} to a receptor area 
A floating gate is used to transfer { TAIL ~ the charge } from { HEAD ~ the photodiode } to a receptor area
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH