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