Device for detecting the end of battery life, power supply circu

Details Device for detecting the end of battery life, power supply circu Device for detecting the end of battery life, power supply circu

1996-05-29

1997-12-16

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

320 48, G05F 140

Patent

active

056989717

ABSTRACT:
The improved device for detecting the end of battery life due to the depletion of battery power has a constant-voltage generator circuit that delivers a constant voltage until the voltage for use limit is reached. An A/D converter circuit performs A/D conversion on the constant voltage from the constant-voltage generator circuit in response to the operating power from a power supply line which decreases as the battery depletes. The device detects the end of battery life in response to the A/D converted value from the A/D converter circuit when the value of digital data obtained by conversion of the constant voltage has varied to exceed a specified level.

REFERENCES:
patent: 4716354 (1987-12-01), Hacker
patent: 5136246 (1992-08-01), Sakamoto

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