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