Waveform 308 represents the duty cycle of {HEAD ~ the pulse width modulated signal} applied to the transistor switch 64 for controlling the voltage and current of {TAIL ~ the solenoid} 16 
Waveform 308 represents the duty cycle of { HEAD ~ the pulse width modulated signal } applied to the transistor switch 64 for controlling the voltage and current of { TAIL ~ the solenoid } 16
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH