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:
Nov. 28, 2000
Filed:
Jul. 02, 1999
Hirotaka Hirano, Gifu, JP;
Yoshinari Higuchi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A power supply device for an electronic equipment is able to execute an accurate discrimination even when a battery, whose characteristics are different, is attached to the electronic equipment. A power supply voltage from a battery cell 11 provided in an external battery 1 is outputted to a power supply terminal 12 and also supplied to an input terminal of an A/D converting means housed in a microcomputer 13. The microcomputer 13 stores threshold values of operation discrimination voltages of a battery (B), and these values are transmitted through a communication terminal 14. A terminal voltage, which is inputted to a power supply terminal 21 provided in an electronic equipment body 2, is applied to an internal circuit 22 or the like, and is also applied to an input terminal of an A/D converting means housed in a microcomputer 23. Also, the microcomputer 23 stores threshold values of operation discrimination voltages of an equipment body (S). Further, the microcomputer 23 includes a communication terminal 24, and the communication terminal 24 and the communication terminal 14 are connected to each other to enable the microcomputers 13, 23 to communicate with each other.