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