When a transistor of the pair is turned off, the associated gated diode structure can provide {HEAD ~ a feedback path} through {TAIL ~ the cell} 
through
When a transistor of the pair is turned off , the associated gated diode structure can provide { HEAD ~ a feedback path } through { TAIL ~ the cell }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL