{HEAD ~ The blocking polarity} is provided by {TAIL ~ a voltage divider} using a substrate bias potential 
is provided by
{ HEAD ~ The blocking polarity } is provided by { TAIL ~ a voltage divider } using a substrate bias potential
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH