During accessing of the output driver, {HEAD ~ the blocking polarity potential} is isolated from gating {TAIL ~ inputs} of the pull up and pull down devices of the output driver 
During accessing of the output driver , { HEAD ~ the blocking polarity potential } is isolated from gating { TAIL ~ inputs } of the pull up and pull down devices of the output driver
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH