An embodiment of a semiconductor device includes a first semiconductor region formed within a semiconductor substrate, a second semiconductor region formed within the semiconductor substrate, a first electrode coupled to the first semiconductor region, a second electrode coupled to the second semiconductor region and proximate the first electrode, wherein the second electrode is encircled by the first electrode. A third electrode may be coupled to the first electrode and the second semiconductor region. A fourth electrode may be coupled to the first semiconductor region and proximate the third electrode, wherein the fourth electrode may be coupled to the second electrode, and wherein the third electrode includes a shared portion of the first electrode.