{TAIL ~ The first bias circuit} has a first reference load element formed of {HEAD ~ a first material} and generates a first bias voltage 
{ TAIL ~ The first bias circuit } has a first reference load element formed of { HEAD ~ a first material } and generates a first bias voltage
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH