A power supply having an input and an output, includes a power converter coupled between the input and output of the power supply including at least one switch that is controlled by comparing {HEAD ~ a sensed voltage}, the sensed voltage corresponding to {TAIL ~ a current} flowing through the switch, to a reference voltage 
A power supply having an input and an output , includes a power converter coupled between the input and output of the power supply including at least one switch that is controlled by comparing { HEAD ~ a sensed voltage } , the sensed voltage corresponding to { TAIL ~ a current } flowing through the switch , to a reference voltage
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