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