{HEAD ~ The first driver circuit} drives {TAIL ~ a first load element} formed of the first material based on the first bias voltage 
{ HEAD ~ The first driver circuit } drives { TAIL ~ a first load element } formed of the first material based on the first bias voltage
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH