Data processing: generic control systems or specific application – Specific application – apparatus or process – Digital audio data processing system
Reexamination Certificate
2005-03-15
2005-03-15
Nguyen, Duc (Department: 2643)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Digital audio data processing system
C340S870030
Reexamination Certificate
active
06868296
ABSTRACT:
In a system which comprises a plurality of audio components2to5connected to an amplifier unit1and wherein an audio signal from one component selected by a selector17is fed to a speaker6for the production of sound, a control circuit15of the amplifier unit1and each of control circuits22, 32, 43, 53of the respective components are connected to each other by a control bus7. The amplifier unit1transmits a call signal to each of the components2to5and 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 selector17, the unit1turns on a muting circuit16. This eliminates the likelihood that the speaker will produce noise when the sound volume is increased while a nonconnected component is selected.
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Arikuma Shoji
Toda Hideharu
Armstrong Kratz Quintos Hanson & Brooks, LLP
Lao Lun-See
Nguyen Duc
Sanyo Electric Co,. Ltd.
Sanyo Technosound Co. Ltd.
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