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