Patent ID: 6630852
Filing Date: 2003-10-07
Classification: G04C

Abstract:
A power-generation detection device comprising:a power-generation detection circuit for detecting the generation of AC power from an external power-generation device, by outputting a power-generation detection signal, and a power-generation time detector for detecting that an output holding time of said power-generation detection signal continues for a predetermined period of time, said power-generation detection circuit comprising; a switching element coupled to said power-generation device and performing a switching operation in response to a cycle of said externally generated AC power; a capacitor element coupled to said switching element for storing charges in response to said switching operation of said switching element; a discharging element coupled to said capacitor element, along a discharging path of said capacitor element, and discharging the charges stored in said capacitor element; and a voltage detector coupled to said capacitor element and the discharging element, detecting whether a voltage across said capacitor element exceeds a predetermined value and providing an output signal depending on the detected voltage.