Patent ID: 7023183

Claim:
A power supply comprising: a source of an input supply voltage developed between a pair of input supply terminals; a first supply inductance; a switch responsive to a periodic control signal for producing from said input supply voltage a periodic current at a first frequency in said first supply inductance that is non-isolated from each of said first pair of terminals; a pair of capacitors coupled in a current path of said first supply inductance current for developing an output supply between a pair of output supply terminals that are coupled to a load, said pair of capacitors providing capacitive isolation of said output supply terminals from said input supply terminals, respectively, at frequencies lower than said first frequency and form with said first supply inductance a first resonant circuit that varies said first supply inductance current in a resonant manner operation, during a first portion of a period of said first supply inductance current; and a first rectifier coupled in said current path for preventing the first supply inductance current variation from resulting in a polarity change of said first supply inductance current, during said first period portion.