Patent ID: 8395361

Claim:
A power supply comprising: an input bus to supply a first DC voltage within a particular range of DC voltage; a regulator, connected to the input bus, to: convert the first DC voltage into a second DC voltage at an output of the regulator, the second DC voltage being higher than the first DC voltage, and regulate an input current to the regulator; an output voltage feedback loop, connected to the output of the regulator, to generate an output voltage value; and a current control loop to generate a control signal, the current control loop including: an input bus voltage sensor to generate an input bus voltage signal, a calculation component to generate a reference voltage value based on the output voltage value and the input bus voltage signal, the calculation component including: a mathematical squarer to derive a square value of the input bus voltage signal, and a mathematical divider to divide the output voltage value by the square value of the input bus voltage signal to generate the reference voltage value, the mathematical squarer being connected to the mathematical divider, an input bus current sensor to generate an input bus current signal, and a current error amplifier to generate the control signal based on the reference voltage value and the input bus current signal, the regulator regulating the input current to the regulator, based on the control signal, to reject voice band range current harmonics from the second DC voltage.