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. 08, 2011
Filed:
Mar. 19, 2008
Applicants:
Toshifumi Okamura, Neyagawa, JP;
Norio Etoh, Neyagawa, JP;
Inventors:
Toshifumi Okamura, Neyagawa, JP;
Norio Etoh, Neyagawa, JP;
Assignee:
Onkyo Corporation, Neyagawa-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 5/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a multichannel amplifier according to the present invention, in a case where a headphone is not connected to a headphone output terminal, a switch IC and first to third switches are on/off controlled by a control unit so that an audio signal path for outputting a front channel signal FL/FR to a front speaker and extending from a first input terminalto a front speaker output terminalvia a buffer circuit, a switch IC, a first volume control unit, a buffer circuit, and a first amplifying unitis not electrically connected to another audio signal path.