{TAIL ~ Transistors} 320 and 324 comprise the main power switches in {HEAD ~ the boost mode} of operation while transistor 308 is always on and transistor 312 is always off 
{ TAIL ~ Transistors } 320 and 324 comprise the main power switches in { HEAD ~ the boost mode } of operation while transistor 308 is always on and transistor 312 is always off
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH