The blocking potential is applied to either or both of a pull up or pull down {HEAD ~ transistor} for reducing {TAIL ~ leakage} current 
for reducing
The blocking potential is applied to either or both of a pull up or pull down { HEAD ~ transistor } for reducing { TAIL ~ leakage } current
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH