Patent ID: 7782579
Filing Date: 2010-08-24
Classification: H01L

Abstract:
1. A semiconductor integrated circuit comprising: a reference potential line to which a reference potential is provided; a first potential line to which a first power source potential is provided; a second potential line to which a second power source potential is provided; a function circuit connected between the reference potential line and to the first potential line, and executing a predetermined function by a transistor; a protecting transistor connected in parallel to the function circuit, between the reference potential line and the first potential line; and a bipolar transistor having a base connected to the second potential line, an emitter connected to the first potential line, and a collector connected to a substrate of the protecting transistor, wherein the base of the bipolar transistor has a conductivity type that is the same as source and drain regions of the protecting transistor, and wherein the second power source potential is set such that wherein VDD