Patent ID: 8030994

Claim:
A driver for supplying an output voltage to an inductive load, the driver comprising: an input for receiving a pulse width modulated control signal having a controllable duty cycle within a predetermined range, a first switch circuit for receiving a first switch signal to supply a first voltage, a second switch circuit for receiving a second switch signal to supply a second voltage, wherein the output voltage is a difference between the first voltage and the second voltage, and an inverter and delay circuit for receiving the control signal to supply the first switch signal and the second switch signal being inverted and delayed with respect to each other, wherein a delay of the delay circuit is selected to obtain an output voltage having a single polarity for each one of said controllable duty cycles within the predetermined range, and wherein the delay circuit is constructed for obtaining the delay having a value in the range T/4 to 3T/4, wherein T is the control signal period.