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