Patent ID: 7714601
Filing Date: 2010-05-11
Classification: G01R,H03K

Abstract:
1. A semiconductor integrated circuit apparatus, comprising: an internal circuit having a plurality of MIS transistors on a semiconductor substrate; a substrate voltage control block that supplies a substrate voltage to the internal circuit and controls threshold voltages for the MIS transistors of the internal circuit; a leakage current detection MIS transistor supplied with a supply voltage of an arbitrary potential to a drain, that has a source connected to a constant current source, and applied with an arbitrary stabilizing potential to a gate in such a manner that the substrate voltage is controlled by the substrate voltage control block; and a leakage current detection circuit having a comparator that compares a source potential of the leakage current detection MIS transistor and a predetermined reference potential, wherein the substrate voltage control block generates the substrate voltage based on comparison results of the comparator and applies the generated substrate voltage to the substrate of the leakage current detection MIS transistor and the substrate of the MIS transistors of the internal circuit.