Electronic apparatus having a power supply unit that can switch

Details Electronic apparatus having a power supply unit that can switch Electronic apparatus having a power supply unit that can switch

1998-03-09

1999-10-19

Fleming, Fritz

Electrical transmission or interconnection systems

Plural supply circuits or sources

Selective or optional sources

307 64, 307 65, 307 85, H02J 100

Patent

active

059694386

ABSTRACT:
Disclosed is an electric power supplying unit for use in an electronic apparatus and includes an external AC adapter externally connected to the body of the electronic apparatus for receiving an external AC power source. An internal AC adapter is accommodated into the body of the electronic apparatus for receiving an external AC power source. An AC power source input detection circuit is provided within the internal AC adapter for detecting whether the external AC power source is input to the internal AC adapter. The power supply unit further includes power source switching circuit responsive to the detection output of the AC power source input detection circuit for switching the power supply to the electronic apparatus from the output of the external AC adapter to the output of the internal AC adapter.

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patent: 5811895 (1998-09-01), Suzuki et al.
patent: 5886424 (1999-03-01), Kim

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