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