Claims
- 1. 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.
- 2. A method of detecting power-generation and determining whether externally generated AC power is being generated from an external power-generation device, the method comprising:charging a capacitor element in response to a cycle of the externally generated AC power; discharging said capacitor element when charging of said capacitor element is not performed: determining the voltage across said capacitor element; monitoring the voltage across said capacitor element to determine whether the voltage exceeds a predetermined voltage, indicating that power generation is being performed; and detecting whether output holding time of said power-generation detection signal continues for a predetermined period of time.
Priority Claims (2)
Number |
Date |
Country |
Kind |
9-160147 |
Jun 1997 |
JP |
|
10-58694 |
Mar 1998 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a Continuation-In-Part of application Ser. No. 09/694,223, filed Oct. 23, 2000, now pending, which is a Continuation of application Ser. No. 09/097,953, filed Jun. 16, 1998, now issued as U.S. Pat. No. 6,140,863.
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Continuations (1)
|
Number |
Date |
Country |
Parent |
09/097953 |
Jun 1998 |
US |
Child |
09/694223 |
|
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09/694223 |
Oct 2000 |
US |
Child |
09/972591 |
|
US |