Patent ID: 6768139
Filing Date: 2004-07-27
Classification: G05F,H01L

Abstract:
A transistor configuration for a bandgap circuit comprising:a substrate, a bipolar transistor formed in said substrate, said transistor having first, second and third doped regions; said first doped region embedded in said second doped region; said second doped region surrounded by said third region; said third region separating said second region from said substrate and surrounded by said substrate; said first and third regions doped opposite to said second region and said substrate, said first and third doped regions being negatively doped and said second region and said substrate being positively doped; and said third region containing a buried plate disposed below said second doped region, said bipolar transistor being formed by said first doped region functioning as an emitter terminal, said second doped region functioning as a base terminal, and said buried plate functioning as a collector terminal.