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:
Mar. 15, 2005
Filed:
May. 26, 2000
Shoji Arikuma, Neyagawa, JP;
Hideharu Toda, Katano, JP;
Shoji Arikuma, Neyagawa, JP;
Hideharu Toda, Katano, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Sanyo Technosound Co., Ltd., Daito, JP;
Abstract
In a system which comprises a plurality of audio componentstoconnected to an amplifier unitand wherein an audio signal from one component selected by a selectoris fed to a speakerfor the production of sound, a control circuitof the amplifier unitand each of control circuitsof the respective components are connected to each other by a control bus. The amplifier unittransmits a call signal to each of the componentstoand checks whether an answer signal is received therefrom in response to the call signal. When the component failing to return the answer signal is selected by the selector, the unitturns on a muting circuit. This eliminates the likelihood that the speaker will produce noise when the sound volume is increased while a nonconnected component is selected.