{HEAD ~ a power supply conversion circuit} converting {TAIL ~ a primary power supply voltage} into a secondary power supply voltage, 
converting
{ HEAD ~ a power supply conversion circuit } converting { TAIL ~ a primary power supply voltage } into a secondary power supply voltage ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH