The DUT consists of {TAIL ~ one branch} of {HEAD ~ parallel transistors} in series with a resistor 
The DUT consists of { TAIL ~ one branch } of { HEAD ~ parallel transistors } in series with a resistor
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH