{HEAD ~ A comparator circuit} outputs a signal corresponding to a difference between {TAIL ~ a control voltage} output from one of the synchronous rectifier circuits and a reference voltage 
{ HEAD ~ A comparator circuit } outputs a signal corresponding to a difference between { TAIL ~ a control voltage } output from one of the synchronous rectifier circuits and a reference voltage
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH