The core collector element receives {HEAD ~ a first voltage level}, and the conductive element receives {TAIL ~ a second voltage level} greater than the first voltage level 
The core collector element receives { HEAD ~ a first voltage level } , and the conductive element receives { TAIL ~ a second voltage level } greater than the first voltage level
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH