Portable information apparatus for sensing battery voltage drop

Details Portable information apparatus for sensing battery voltage drop Portable information apparatus for sensing battery voltage drop

1990-12-11

1993-02-16

Harvey, Jack B.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324436, 340636, G01N 27416

Patent

active

051874415

ABSTRACT:
The portable information apparatus has a battery, a boosting circuit for boosting a voltage of the battery, a battery voltage detector for detecting a voltage level of the battery, an oscillating circuit for generating CPU clock and a counting circuit for counting the interval from the start of the oscillation of the CPU clock to the time when it becomes stable. The apparatus negates the output of the battery voltage detector during the interval counted by the counting circuit so that it can prevent the monitoring of the battery voltage lowering in the time of usual performance from influencing of the battery potential drop due to the transient current at the start of the performance of the boosting circuit and the oscillating circuit.

REFERENCES:
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patent: 4080560 (1978-03-01), Abert
patent: 4725784 (1988-02-01), Peled et al.
patent: 4849681 (1989-07-01), Munnig Schmidt et al.
patent: 4958127 (1990-09-01), Williams et al.
patent: 4977393 (1990-12-01), Arnold et al.
patent: 5027294 (1991-06-01), Fakruddin et al.
patent: 5036284 (1991-07-01), Cichanski

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