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