In other embodiments, {HEAD ~ the second voltage value} is different than {TAIL ~ the first voltage value} and the second voltage is adjusted by decreasing a bitline BL voltage value 
is different than
In other embodiments , { HEAD ~ the second voltage value } is different than { TAIL ~ the first voltage value } and the second voltage is adjusted by decreasing a bitline BL voltage value
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH