It is an object of the invention to improve {HEAD ~ a direct voltage flyback converter} of {TAIL ~ the type} initially mentioned 
of
It is an object of the invention to improve { HEAD ~ a direct voltage flyback converter } of { TAIL ~ the type } initially mentioned
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH