{HEAD ~ a transfer element} that is turned on or off by {TAIL ~ a transfer signal} and that transfers the electric charge in the photoelectric conversion element to the input node in an on state, and 
is turned off by
{ HEAD ~ a transfer element } that is turned on or off by { TAIL ~ a transfer signal } and that transfers the electric charge in the photoelectric conversion element to the input node in an on state , and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH