The increasing duty cycle of the drive signal provided to the transistor switch results in {HEAD ~ increasing virtual voltage levels} being applied to {TAIL ~ the solenoid} 
applied to
The increasing duty cycle of the drive signal provided to the transistor switch results in { HEAD ~ increasing virtual voltage levels } being applied to { TAIL ~ the solenoid }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL