The waveforms 304 and 306 represent {HEAD ~ the rectified line voltage} referred to as signal VBUS and the virtual voltage as applied to {TAIL ~ the solenoid} 16 as a result of the switching action of the transistor switch 64 
The waveforms 304 and 306 represent { HEAD ~ the rectified line voltage } referred to as signal VBUS and the virtual voltage as applied to { TAIL ~ the solenoid } 16 as a result of the switching action of the transistor switch 64
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH