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