{TAIL ~ The second direction} opposes the first direction, {HEAD ~ the first voltage} has a different value than the second voltage, and the first duration is substantially the same as the second duration 
{ TAIL ~ The second direction } opposes the first direction , { HEAD ~ the first voltage } has a different value than the second voltage , and the first duration is substantially the same as the second duration
TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH