Portable electronic device and method for supplying current to d

Details Portable electronic device and method for supplying current to d Portable electronic device and method for supplying current to d

1995-05-09

1997-12-23

Eisenzopf, Reinhard J.

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

455343, 455 89, H02J 734, H04B 138

Patent

active

057015970

ABSTRACT:
According to a first aspect, a portable electronic device has at least two load circuits which are independently powered by different batteries. According to a second aspect, the load circuits are powered by the same battery, but their power lines are branched from a node located close to the battery, thereby reducing common impedance. According to a third aspect, two power lines are coupled through switches to two independent batteries, and are mutually coupled through a third switch. The switches are controlled according to the discharge states of the batteries. According to a fourth aspect, a battery charger charges two or more batteries by supplying current to them for short intervals in turn, so that all batteries reach full charge at substantially the same time.

REFERENCES:
patent: 3818237 (1974-06-01), Straus
patent: 4044268 (1977-08-01), Hammel et al.
patent: 5050235 (1991-09-01), Kojima
patent: 5519261 (1996-05-01), Stewart
patent: 5541929 (1996-07-01), Jokura

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