The read circuit consists of {HEAD ~ three transistors} connected in {TAIL ~ series}, which operate in the low signal mode in reading 
connected in
The read circuit consists of { HEAD ~ three transistors } connected in { TAIL ~ series } , which operate in the low signal mode in reading
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH