Patent ID: 8410719

Claim:
An electronic ballast for driving at least one light source, the electronic ballast comprising: an input for connecting a supply voltage; an output configured to connect the at least one light source; an oscillator, which is designed to provide an oscillator output signal with a first frequency at its output, the oscillator having a calibration input in order to alter the first frequency; and a microcontroller configured to provide a drive signal with at least one spectral component at a second frequency for the at least one light source, the microcontroller being coupled to the oscillator output and being designed to generate the second frequency as a function of the first frequency; wherein characterized in that the electronic ballast furthermore comprises a drive circuit, which is coupled to the calibration input, the drive circuit being designed to vary the first frequency during running operation of the electronic ballast via the calibration input, and wherein the electronic ballast comprises a calibration register, which is coupled to the oscillator.