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:
Dec. 06, 2005
Filed:
Aug. 01, 2002
Atsuko Sugiura, Tokyo, JP;
Naoya Ishii, Tokyo, JP;
Takashi Taga, Niigata, JP;
Toshiaki Uotani, Niigata, JP;
Atsuko Sugiura, Tokyo, JP;
Naoya Ishii, Tokyo, JP;
Takashi Taga, Niigata, JP;
Toshiaki Uotani, Niigata, JP;
NEC Corporation, Tokyo, JP;
Abstract
An audio signal output device is disclosed in which optical signals are not output when a plug is not connected to an S/PDIF output terminal. When a plug is not connected to the S/PDIF output terminal, a fitting metal part does not contact a detection pin, and a connection detection signal is therefore 12V. As a result, a PNP transistor and an n-channel MOS transistor are both OFF, a power supply voltage of 5 V is not supplied to a drive IC, and optical signals are not output.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile