Patent ID: 6255713
Filing Date: 2001-07-03
Classification: H01L

Abstract:
A current source formed in a p-type substrate comprising:a deep n-well formed within said p-type substrate;a buried n+ layer formed within said deep n-well;a p-well formed within said deep n-well and atop said buried n+ layer;an oxide isolation structure surrounding said p-well and extending from the surface of said deep n-well to below the level of said p-well;a n+ reference structure formed within said p-well;a gate formed above said p-well, said gate separated from said substrate by a thin oxide layer, said gate extending over at least a portion of said n+ reference structure; anda n+ output structure formed within said p-well, said n+ output structure not extending to said gate;wherein an input reference current is provided to said n+ reference structure and an output current is provided by said n+ output structure.