A Boost Strap circuit lifts the gate of {TAIL ~ coil switch circuit} above {HEAD ~ the battery voltage level} and turns on the coil switch 
A Boost Strap circuit lifts the gate of { TAIL ~ coil switch circuit } above { HEAD ~ the battery voltage level } and turns on the coil switch
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH