发明授权
- 专利标题: Oversampled digital-to-analog converter based on nonlinear separation and linear recombination
- 专利标题(中): 基于非线性分离和线性重组的过采样数模转换器
-
申请号: US61671申请日: 1998-04-16
-
公开(公告)号: US5982317A公开(公告)日: 1999-11-09
- 发明人: Jesper Steensgaard-Madsen
- 申请人: Jesper Steensgaard-Madsen
- 申请人地址: DKX Hoejby Sjaelland
- 专利权人: Steensgaard-Madsen; Jesper
- 当前专利权人: Steensgaard-Madsen; Jesper
- 当前专利权人地址: DKX Hoejby Sjaelland
- 主分类号: H03M1/08
- IPC分类号: H03M1/08 ; H03M3/02 ; H03M3/04 ; H03M3/00
摘要:
A error-shaping digital-to-analog (D/A) converter system [100], consisting of a separator [102], a set of D/A converters [104] [108], a set of optional analog filters [106] [108], a summation device [112], and an optional analog filter [114]. The separator [102] separates the digital input signal into a set of low-resolution signals of which only one has significant power in the system's signal band. These signals are D/A converted by mismatch-shaping D/A converters [104] [108], in some embodiments filtered by analog filters [106] [108], and then added by the summing device [112]. Imperfections of the employed D/A converters [104] [108] will only cause very small errors in the signal band, such errors being essentially uncorrelated to the digital input signal. The D/A converter system is comparable to a scaled-element D/A converter in which the distortion is transformed into a noise component having very little power in the signal band.
公开/授权文献
- USD389433S Snowmobile track 公开/授权日:1998-01-20
信息查询