The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2004
Filed:
Jun. 16, 2000
Fumihiro Muramatsu, Shizuoka, JP;
Iwao Matsuura, Kanagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
PC card integrated radio communication apparatus is provided wherein the service hour is prolonged and battery charge is made possible in the operating state where current consumption of the radio communication section is small, by controlling power distribution to each section of the apparatus and to control battery charge for power supply from a PC card slot and power supply from a battery, depending on the power supply state of the personal computer and operating state of the apparatus. The circuit configuration includes switch circuits (C , C , C , C ) so that power source for respective power circuits (C , C ) of the radio communication section (C ) and the modem section (C ) can be selected from the PCMCIA I/F (b ) of a personal computer or a signal, or both of them simultaneously. This allows selection of the optimum power supply mode depending on the connection mode and operating state of the apparatus. The circuit configuration also includes a charger circuit (C ) thus allowing charge of the battery (C ) via power supply from the PCMCIA I/F (b ) in a state where operating current of the apparatus is small.