Based on this signal, a pulse width modulation control circuit ON/OFF controls a field effect transistor provided corresponding to a primary winding of a transformer in such a manner that the control voltage {HEAD ~ the reference control voltage} attain {TAIL ~ predetermined levels} 
attain
Based on this signal , a pulse width modulation control circuit ON / OFF controls a field effect transistor provided corresponding to a primary winding of a transformer in such a manner that the control voltage { HEAD ~ the reference control voltage } attain { TAIL ~ predetermined levels }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL