Battery back-up for electronic circuits

Details Battery back-up for electronic circuits Battery back-up for electronic circuits

1991-11-25

1997-03-04

Fleming, Fritz

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 66, 307 72, H02J 906

Patent

active

056082738

ABSTRACT:
The invention concerns battery back-up for electronic equipment. A sensor detects a drop in power supply voltage and, in response, connects the back-up battery to the equipment, via a Field-Effect Transistor (FET). The FET causes a lower voltage drop between the battery and the equipment, as compared with a commonly used alternative, namely, a diode.

REFERENCES:
patent: Re32200 (1986-07-01), Lee et al.
patent: 4617473 (1986-10-01), Bingham
patent: 4677311 (1987-06-01), Morita
patent: 4740542 (1987-11-01), Hwang
patent: 4831595 (1989-05-01), Bone
patent: 4908790 (1990-03-01), Little et al.
patent: 5160851 (1992-11-01), McAndrews

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