Patent ID: 8717058
Filing Date: 2014-05-06
Classification: G01R

Abstract:
1. A semiconductor apparatus comprising: a set value storage unit that stores a set value determined based on a characteristic value of a parameter of the semiconductor apparatus at an initial timing; and a detector that detects characteristic degradation of the semiconductor apparatus based on detecting the characteristic value of the parameter of the semiconductor apparatus at a given timing after the initial timing and the set value stored in the set value storage unit, wherein the detector is an on-resistance detector that detects an on-resistance of a semiconductor device that is included in the semiconductor apparatus, wherein the on-resistance detector includes: a first resistor having one end connected to a source of the semiconductor device at a first node and another end connected to a second node; a first variable resistor having one end connected to a drain of the semiconductor device and another end connected to a third node; a second resistor having one end connected to the third node and another end connected to the second node; and a first comparator that receives a voltage value of the first node and a voltage value of the third node, and outputs a signal based on a potential difference between the voltage value of the first node and the voltage value of the third node.