CURRENT RIPPLE CONTROL BY DERIVATION AND SWITCHING
The invention relates to a method and a circuit for supplying current and reducing voltage ripple to a load. The circuit (10) comprises a current sensor (11) configured to sense the current supplied via a sensor input and to produce an output signal representing a time derivative of the sensed current, and a switch (12) configured to switch the current, a switching frequency of the switch being controlled by said output signal representing a time derivative of the sense current, thereby producing a switched output current to the load.