Patent ID: 6020780
Filing Date: 2000-02-01
Classification: G05F

Abstract:
A semiconductor integrated circuit device comprising a substrate potential detection section supplied with a power-supply voltage for detecting a substrate potential to produce a substrate potential detection signal and a substrate potential generation circuit for generating the substrate potential in response to the substrate potential detection signal, wherein said substrate potential detection section comprises a plurality of different substrate potential detection circuits having different power-supply voltage versus substrate potential characteristics for generating a plurality of different substrate detection signals and composition means for composing the plurality of different substrate detection signals to generate a composite substrate potential detection signal, wherein said composition means comprises a logical circuit for combining the plurality of different substrate detection signals to output a logical output and an OR circuit for Oring the plurality of different substrate detection signals to produce an Ored signal and selection means for selecting one of the logical output and the Ored signal as the composite substrate detection signal.