Patent ID: 6624737
Filing Date: 2003-09-23
Classification: G05F,H01L

Abstract:
A voltage regulated circuit with a well resistor divider, said voltage regulated circuit comprises:a first doped region, said first doped region is located in a substrate and said first doped region is connected with a source voltage, wherein said substrate is a P-type substrate; a second doped region, said second doped region is located in said substrate and is connected with a referred voltage; a third doped region, said third doped region is located in said substrate and contacts to said first doped region and said second doped region; when said source voltage is increased suddenly, said third doped region will extend to make said referred voltage become a stable voltage value; a isolation region, said isolation region is located between said first doped region and said second doped region in said substrate and is on said third doped region; a fourth doped region, said fourth doped region is located in said substrate and is on a side of said second doped region; and a resistor, said resistor is connected with said second doped region and said fourth doped region.