Portable equipment with backup battery charging function

Details Portable equipment with backup battery charging function Portable equipment with backup battery charging function

2005-12-27

2005-12-27

Tibbits, Pia (Department: 2838)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

C320S116000

Reexamination Certificate

active

06979915

ABSTRACT:
An object of the invention is to provide a backup battery charging circuit capable of continuing to charge a backup battery to the limit of the voltage drop of a main battery so as to reduce the possibility of data disappearance to an achievable extent. For this purpose, a backup battery charging circuit comprises: a main battery serving as a power supply; a backward current protection diode; a regulator circuit using the main battery as the power supply; a limiting resistor; a backup battery; a switch for performing direct charging from the main battery; and a comparator for determining whether the regulator circuit or the switch is to be used.

REFERENCES:
patent: 5666041 (1997-09-01), Stuart et al.
patent: 2298892 (1976-09-01), None
patent: 07273717 (1995-10-01), None
patent: 2001025161 (2001-01-01), None
patent: 2001051735 (2001-02-01), None
JPO Computer Translation of JP-2001025161.

Affiliated with

Also associated with

Rating

Portable equipment with backup battery charging function does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Portable equipment with backup battery charging function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable equipment with backup battery charging function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3465298