Patent ID: 9337749
Filing Date: 2016-05-10
CPC Classification: G01R,H02M,H02P,H03K

Claim Text:
1. A circuit device comprising: a bridge circuit having a first transistor provided between a node of a high-potential side power supply and a first node and a second transistor provided between the first node and a node of a low-potential side power supply; a pre-driver circuit that outputs a first drive signal and a second drive signal to a first gate node of the first transistor and a second gate node of the second transistor, respectively; a bias circuit that supplies a bias voltage as a power supply voltage that sets a low level of the first drive signal; and an abnormal condition detection circuit that detects an abnormal condition where a high voltage higher than a normal voltage is applied between a gate and a source of the first transistor, and, if detecting the abnormal condition, sets a gate-source voltage of the first transistor to a voltage lower than the high voltage.