The reading structure is external to the pixel array but may still be fabricated on {HEAD ~ the same CMOS chip} as {TAIL ~ the pixel array} 
The reading structure is external to the pixel array but may still be fabricated on { HEAD ~ the same CMOS chip } as { TAIL ~ the pixel array }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL