Battery power measuring system and method for a...

Details Battery power measuring system and method for a... Battery power measuring system and method for a...

2005-11-22

2005-11-22

Phung, Anh (Department: 2824)

Static information storage and retrieval

Powering

C365S227000, C320S132000, C711S118000

Reexamination Certificate

active

06967890

ABSTRACT:
A battery power measuring system for a Battery-Backed SRAM includes a nonvolatile memory (11), a clock (12), a CPU (10) and a buzzer (13). The nonvolatile memory is for storing a system time, an estimated battery maximal endurance, an estimated battery minimal endurance, and a cumulative on-battery run time. The clock is for indicating the current system time. The CPU is for calculating a new cumulative on-battery run time and a remaining battery endurance. The buzzer is for reminding users to replace a battery when the remaining battery endurance is lower than the estimated battery minimal endurance. The CPU is connected to the nonvolatile memory, the clock, and the buzzer through a plurality of data buses (14). A related battery power measuring method is also provided.

REFERENCES:
patent: 5323354 (1994-06-01), Matsumoto et al.
patent: 5375246 (1994-12-01), Kimura et al.
patent: 6329796 (2001-12-01), Popescu
patent: 2003/0193318 (2003-10-01), Ozawa et al.

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