发明名称 |
Method and apparatus for improving S/N ratio in digital-to-analog conversion of pulse density modulated (PDM) signal |
摘要 |
<p>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. <IMAGE></p> |
申请公布号 |
EP1168631(A2) |
申请公布日期 |
2002.01.02 |
申请号 |
EP20010114242 |
申请日期 |
2001.06.12 |
申请人 |
BURR-BROWN JAPAN, LTD. |
发明人 |
SHIGETOSHI, NAKAO;TOSHIHIKO, HAMASAKI |
分类号 |
G11B20/10;G11B20/14;H03M3/02;(IPC1-7):H03M3/02 |
主分类号 |
G11B20/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|