Audio processing system for use in multi-channel audio chip

Details Audio processing system for use in multi-channel audio chip Audio processing system for use in multi-channel audio chip

2003-12-15

2009-02-24

Kuntz, Curtis (Department: 2614)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Digital audio data processing system

Reexamination Certificate

active

07496417

ABSTRACT:
An audio processing system for used in a multi-channel audio chip includes a multiplexer, a digital-to-analog converter, a de-multiplexer, a controller and N sample-and-hold circuits. The multiplexer receives N digital signals and outputs the digital signals one by one in a time-division manner. The digital-to-analog converter receives the digital signals from the multiplexer and converts them into corresponding N analog signals. The de-multiplexer outputs the analog signals one by one in a time-division manner. The controller generates control signals to control the selection of the multiplexer and the de-multiplexer. The sample-and-hold circuits hold the analog signals for a predetermined period of time and then outputs the signals, respectively.

REFERENCES:
patent: 4977446 (1990-12-01), Shiomi et al.
patent: 5059872 (1991-10-01), Matsumi et al.

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