The control signal is processed by {HEAD ~ a FSM} that individually turns on or off {TAIL ~ the transistors} within the parallel branch until the DUT impedance value falls within the desired range 
individually turns on
The control signal is processed by { HEAD ~ a FSM } that individually turns on or off { TAIL ~ the transistors } within the parallel branch until the DUT impedance value falls within the desired range
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH