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