Patent ID: 9300313
Filing Date: 2016-03-29
CPC Classification: H03M

Claim Text:
1. A semiconductor integrated circuit device comprising an input port connected to a first power supply voltage via a first resistor and connected to an analog signal input terminal to be measured via a second resistor having a resistance lower than the first resistor; a first MIS transistor of a first conductivity type, wherein a first end of a source/drain is connected to the input port and a second end of a source/drain is connected to a first node; a second MIS transistor of a second conductivity type, wherein the first end of a source/drain is connected to the input port and a second end of a source/drain is connected to a first node; and a switch for connecting the first node and the first power supply voltage; an analog/digital conversion circuit converting a voltage of the first node into a digital signal, wherein the analog/digital conversion circuit detects a disconnection in a path from the analog signal input terminal to the input port by converting a voltage of the first node.