Patent ID: 8717015

Claim:
A magnetic field measuring system comprising: a substrate of a first conductivity type; a conductive well of a second conductivity type formed in the substrate, the second conductivity type being different than the first conductivity type, the well having a first side with a first length that defines a length of the well and a second side with a second length that defines a width of the well, the second length being less than the first length; a first contact electrically connected to the conductive well at a first location along the first side; a second contact electrically connected to the conductive well at a second location along the first side, wherein the first contact and the second contact are electrically coupled to each other via the conductive well, and wherein the distance between the first location and the second location is less than the second length; a stimulus circuit coupled to the first contact and the second contact; and a sensor for identifying a property indicative of the length of a current path from the first location to the second location through the conductive well.