Power failure abnormal condition detection device and power failure abnormal condition detection method

摘要

PROBLEM TO BE SOLVED: To detect an abnormal state at the time of main power-off of an electronic device. An antenna includes an antenna element that receives radiation noise emitted from a device on a circuit board of an electronic device, and a resonance circuit that is connected to the antenna element and that can adjust a resonance frequency. Output the received signal that represents. The sensor monitors the received signal to detect an abnormal state when the main power of the electronic device is cut off. [Selection diagram] FIG.