Patent ID: 8514595

Claim:
A method of operating a switching power supply, the method comprising: operating the switching power supply at a power supply load using power supply operation circuitry, wherein the switching power supply is configured to operate at a plurality of switching frequencies including at least a first switching frequency and a second switching frequency; determining a first measured frequency corresponding to the first switching frequency of the switching power supply using calculation circuitry, wherein the switching power supply generates the plurality of switching frequencies without input from the calculation circuitry; computing a first plurality of harmonic frequencies associated with the first measured frequency; determining a second measured frequency corresponding to the second switching frequency of the switching power supply using the calculation circuitry; computing a second plurality of harmonic frequencies associated with the second measured frequency; selecting a target switching frequency from the first switching frequency and the second switching frequency, wherein harmonic frequencies associated with the target switching frequency fall outside of a predetermined frequency band of interest; and instructing the switching power supply to operate at the target switching frequency.