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