Patent ID: 6696951
Filing Date: 2004-02-24
Classification: G08B

Abstract:
A computer-readable medium comprising instructions to cause a processor to:calculate a first target intensity for a first magnetic field; activate and deactivate a first set of current switching devices in accordance with a first programmable activation duration and a first programmable polarity to drive a first pulse of current through a coil to create the first magnetic field having the first target intensity, wherein the first pulse has a first duration and a first polarity that conforms to the first programmable activation duration and the first programmable polarity; calculate a second target intensity for a second magnetic field; and activate and deactivate a second set of current switching devices in accordance with a second programmable activation duration and a second programmable polarity to drive a second pulse of current through the coil to create the second magnetic field having the second target intensity and an orientation different from the first magnetic field, wherein the second pulse has a second duration and a second polarity that conforms to the second programmable activation duration and the second programmable polarity.