In a DC switching regulator circuit, a circuit to demagnetize the transformer during OFF periods to extend {TAIL ~ the duty cycle range} of {HEAD ~ the regulator} 
In a DC switching regulator circuit , a circuit to demagnetize the transformer during OFF periods to extend { TAIL ~ the duty cycle range } of { HEAD ~ the regulator }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD