An Analytical Theory of Piezoresistive Effects in Hall Plates with Large Contacts

Figure 11

FEM-computation of input and output resistances of circular and elliptical devices with isotropic conductivity. Due to symmetry only a quarter of the real devices had to be modeled. The elliptical device is obtained from the circular one by stretching it times 1.5 in vertical direction and times 2/3 in horizontal direction. Contacts are thick black lines on the perimeter. The color coding denotes the electric potential (red = 1 V, blue = 0 V) and the gray lines are current streamlines.