Providing {HEAD ~ a configuration} that, when an AD converter is provided for each of pixel columns, enables {TAIL ~ each} of the elements to be arranged without increasing the element arrangement pitch 
enables
Providing { HEAD ~ a configuration } that , when an AD converter is provided for each of pixel columns , enables { TAIL ~ each } of the elements to be arranged without increasing the element arrangement pitch
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH