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