Portable information terminal apparatus and voltage...

Details Portable information terminal apparatus and voltage... Portable information terminal apparatus and voltage...

2006-05-30

2009-06-23

Karlsen, Ernest F (Department: 2829)

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

C340S636150, C702S063000

Reexamination Certificate

active

07550975

ABSTRACT:
The measurement unit measures a voltage by converting it from analog to digital and outputs a measurement value. The changeover unit, being connected to a battery and a reference voltage source generating a highly accurate fixed voltage, selects one of them and applies it to the measurement unit. The voltage value output unit makes the changeover unit select a fixed voltage generated by a predetermined voltage source, makes the measurement unit measure it as a reference voltage and generates calculation-use information for calculating a voltage value from a measurement result based on a measurement value of the fixed voltage and a voltage value of the reference voltage. The voltage value output unit, when making the changeover unit select a voltage of the battery and making the measurement unit measure it, uses the measurement value of it and the calculation-use information to calculate and output a voltage value of the battery.

REFERENCES:
patent: 5712568 (1998-01-01), Flohr et al.
patent: 2000-162251 (2000-06-01), None
patent: 2001-282368 (2001-10-01), None
patent: 3609027 (2004-10-01), None

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