US Patent 7940938 Sound reproducing apparatus
Patent 7940938 was granted and assigned to Yamaha (yacht) on May, 2011 by the United States Patent and Trademark Office.
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Patent abstract
A sound reproducing apparatus which can be relatively inexpensive as a whole and also be simple in construction with reduced wiring even in the case where many speakers are used. Pulse-width modulated (PWM) pulses are generated based on respective audio signals for multiple-channel speakers. PWM pulses are time-division multiplexed and amplified, and then output as digital driving signals. The multiple-channel speakers are selectively turned on/off such that the digital driving signals are supplied to the respective multiple-channel speakers of corresponding channels.
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Patent Inventor Names
Akira Miki0
Masayoshi Sahara0
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US Patent 07940938 Sound reproducing apparatus US Patent 7940938 Sound reproducing apparatus
Infobox
Patent Number
079409380
Patent Number
79409380
Edits on 26 Sep, 2022
Golden AI
Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
079409380
Date of Patent
May 10, 2011
0Patent Application Number
114322250
Date Filed
May 11, 2006
0Patent Primary Examiner
Edits on 7 Dec, 2021
Golden AI
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Infobox (+8 properties)
US Patent 07940938 Sound reproducing apparatus
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07940938
Date of patent
May 10, 2011
Patent application number
11432225
Date Filed
May 11, 2006
Patent primary examiner
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