FIELD: electricity.
SUBSTANCE: invention relates to controlling pulse width modulated input signals. Electrical circuit comprising controller (2) for controlling a pulse width modulated input signal, and driver (4) configured to supply current to load (6) based on the input signal, wherein over the on time of each pulse width modulation period driver (4) supplies current to load (6) with a second frequency that is greater than the first frequency. Controller (2) is configured to control the duty cycle to set the output of load (6) to a desired output level, and to dither the duty cycle about a point corresponding to the desired output level.
EFFECT: technical result is widening the range of tools for the same purpose.
14 cl, 17 dwg
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