Title:
SYSTEM AND METHOD FOR AUTOMATIC ALARM-LEVEL CORRECTION OF BATTERY ALARM CIRCUIT
Document Type and Number:
Japanese Patent JP3769516
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To monitor a momentary load fluctuation with respect to a load bias not controlled by a CPU and to automatically correct an alarm level.
SOLUTION: In an automatic alarm-level correction system for a battery alarm circuit, an alarm is output with respect to a remaining amount of a battery 100 used to supply electric power to an electronic apparatus. The system is provided with alarm-level variable parts 104, 105, 106, 108 which divide a voltage variably so as to form the alarm when the alarm level is output with respect to the remaining amount, by comparing the alarm level by voltage- dividing an output viltage of the battery with a prescribed reference voltage; and alarm-level correction parts 107, 109, 110, 114, 115 which voltage-divide the alarm-level variable parts so as to correct the alarm level, in such a way that a difference between the reference voltage and the alarm level is made large or small, by detecting the existence of the momentary function in the output voltage of the battery and according to the existence of the fluctuation.
Inventors:
Satoshi Kumagai
Application Number:
JP2002101194A
Publication Date:
April 26, 2006
Filing Date:
April 03, 2002
Export Citation:
Assignee:
NEC Access Technica Co., Ltd.
International Classes:
G01R31/36; G01R19/165; H01M10/48; H02J7/00; (IPC1-7): G01R31/36; G01R19/165; H01M10/48; H02J7/00
Domestic Patent References:
| JP1167685A | ||||
| JP63115763U |
Attorney, Agent or Firm:
Yuichiro Asano