Patent ID: 6140863
Filing Date: 2000-10-31
Classification: G04C,H02N

Abstract:
A power-generation detection circuit, for detecting the generation of AC power from an external power-generation device 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; anda voltage detector coupled to said capacitor element and detecting whether a voltage across said capacitor element exceeds a predetermined value, and outputting a power generation detection signal for switching a circuit into a power save mode when said voltage across said capacitor does not exceed said predetermined value.