Patent ID: 6424013
Filing Date: 2002-07-23
Classification: H01L

Abstract:
A structure, comprising:an external terminal; a reference terminal; a substrate; a first lightly doped region having a first conductivity type formed at a face of the substrate; an isolation region formed in the substrate and enclosing the first lightly doped region; a first heavily doped region having a second conductivity type formed at least partially within the first lightly doped region, the first heavily doped region coupled to the external terminal; a second heavily doped region having the second conductivity type spaced apart from the first heavily doped region and formed at least partially within the first lightly doped region, the second heavily doped region coupled to the reference terminal; a third heavily doped region having the first conductivity type formed at least partially within the first lightly doped region; and a first resistor coupled between the reference terminal and the third heavily doped region.