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