Electronic device, battery pack and charger for the battery pack

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United States of America Patent

PATENT NO 5627449
SERIAL NO

08291858

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Abstract

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An electronic device (21) switches its operation mode in accordance with the type of an installed battery pack (22). The battery pack (22) has a regulator (222), a specification-discriminating terminal (TJ), and a resistor (224), connected between the regulator (222) and the specification-discriminating terminal (TJ) and having a resistance corresponding to the specification of the incorporated battery (221). The electronic device (21) has a monitor resistor (214) connected between a terminal (TL) connected to the specification-discriminating terminal (TJ) of the battery pack (22) and ground, a discriminating circuit (212, 215, 216) for detecting a monitor voltage generated across this monitor resistor (214) to discriminate the specification of the battery (221), and a switch controller (212, 219) for switching the operation mode in accordance with the specification discriminated by the discriminating circuit (212, 215, 216).

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Patent Owner(s)

Patent OwnerAddress
YAESU MUSEN CO LTD8-8 NAKAMEGURO 8-CHOME MEGURO-KU TOKYO

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujiki, Shiro Tokyo, JP 6 52

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