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