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Title:
パルス密度変調信号(PDM)のデジタル-アナログ変換処理におけるSN比改善の方法および装置
Document Type and Number:
Japanese Patent JP4454109
Kind Code:
B2
Abstract:
A method and apparatus for improving an S/N ratio in a digital-to-analog conversion of a PDM signal arc provided. A digital-to-analog conversion system comprises an S/N ratio improving section. The S/N ratio improving section has a signal component extractor which extracts a signal component included in the PDM signal, and outputs a digitally filtered output signal. The digitally filtered output signal has a second full scale smaller than a first full scale of the PDM signal. The S/N ratio improving section also comprises a full-scale matching unit which matches the second full scale of the digitally filtered output signal with a third full scale of digital-to-analog conversion.

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Inventors:
Shigetoshi Nakao
Hama Saki Toshihiko
Application Number:
JP2000178389A
Publication Date:
April 21, 2010
Filing Date:
June 14, 2000
Export Citation:
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Assignee:
Texas Instruments Japan Ltd.
International Classes:
G11B20/10; H03M3/02; G11B20/14
Domestic Patent References:
JP63087017A
JP6335082A
Foreign References:
WO1999020004A1



 
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