In {TAIL ~ a self refresh mode}, data from the output of {HEAD ~ the sense amplifier} is fed back via the transition circuit to the input of the write amplifier 
In { TAIL ~ a self refresh mode } , data from the output of { HEAD ~ the sense amplifier } is fed back via the transition circuit to the input of the write amplifier
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH