{HEAD ~ The invention} more particularly relates to {TAIL ~ an energy conserving drive circuit} for the pulse width modulator and the main power switch 
particularly relates to
{ HEAD ~ The invention } more particularly relates to { TAIL ~ an energy conserving drive circuit } for the pulse width modulator and the main power switch
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH