Patent ID: 7440821

Claim:
A method of driving the coil of an electrohydraulic valve with a pulse width modulator drive, comprising: transmitting a feedback signal to a digitizing device that is electrically connected to the electrohydraulic valve; sampling the feedback signal within the digitizing device to create a plurality of signal samples within one pulse width modulator cycle; transmitting the plurality of samples to an accumulator; averaging the plurality of samples within the accumulator to create an average value; and transmitting the average value to a closed loop control algorithm that generates a pulse width signal to drive the coil of the electrohydraulic valve; wherein the accumulator resets when the algorithm sends the pulse width signal to the coil of the electrohydraulic valve such that the method of driving the coil of an electrohydraulic valve with a pulse width modulator drive starts over again for a next pulse width modulator cycle.