Electronic circuit with power drain control

Details Electronic circuit with power drain control Electronic circuit with power drain control

1988-04-04

1990-03-13

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

307 66, 307 18, H02J 100, H02J 700, H02J 110

Patent

active

049085239

ABSTRACT:
A power switching circuit is described for supplying power to a radio pager which must be continuously powered from either a main or backup battery. The main battery voltage is monitored and at appropriate levels as its value falls, selected functions of the pager are eliminated and switch over to the backup battery is made to keep alive essential functions.

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patent: 3696286 (1972-10-01), Ule
patent: 4143282 (1979-03-01), Berard, Jr. et al.
patent: 4345286 (1982-08-01), Kanayama et al.
patent: 4575640 (1986-03-01), Martin
patent: 4599686 (1986-07-01), Muller et al.
patent: 4617473 (1986-10-01), Bingham
patent: 4692145 (1987-09-01), Weyant
patent: 4698578 (1987-10-01), Mullersman et al.
patent: 4745299 (1988-05-01), Eng et al.
patent: 4774450 (1988-09-01), Kitamura
patent: 4788450 (1988-11-01), Wagner

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