Detection circuit for heat sensor, heat sensor device, and electronic device

摘要

A detection circuit for a heat sensor includes a charge circuit (20) provided between a second power supply node (VDD) and a detection node (N1) of a heat sensing element (CF), a discharge circuit (30) provided between the detection node (N1) and a first power supply node (VSS), and a voltage detection circuit (50). The discharge circuit has a discharge resistance element (RA) and a discharge transistor (T2) provided in series between the detection node and the first power supply node.