发明公开
- 专利标题： PROCEDE D'AMELIORATION DE LA RESOLUTION ET DE CORRECTION DES DISTORSIONS POUR MODULATEUR SIGMA-DELTA ET MODULATEUR SIGMA-DELTA METTANT EN UVRE LE PROCEDE
- 专利标题（英）： Method for improving the resolution and the correction of distortions in a sigma-delta modulator, and sigma-delta modulator implementing said method
- 专利标题（中）： 一种用于改善扭曲的分辨率和校正的Σ-Δ调制器和程序实施的Σ-Δ调制
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申请号： EP09775123.4申请日： 2009-10-29
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公开(公告)号： EP2342828A1公开(公告)日： 2011-07-13
- 发明人: HODE, Jean-Michel , KAMOUN, Leila
- 申请人： THALES
- 申请人地址： 45, rue de Villiers 92200 Neuilly-sur-Seine FR
- 专利权人： THALES
- 当前专利权人： THALES
- 当前专利权人地址： 45, rue de Villiers 92200 Neuilly-sur-Seine FR
- 代理机构： Brunelli, Gérald
- 优先权： FR0806079 20081031
- 国际公布： WO2010049507 20100506
- 主分类号： H03M3/00
- IPC分类号： H03M3/00 ; H03M3/02
摘要：
The invention relates to a method for improving the resolution and the correction of distortions in a sigma-delta modulator, wherein the modulator (200) converts an analog input signal e(t) into a secondary output digital signal s(t) sampled at a frequency fθ and encoded over NB bits, a second main output digital signal s’(t) represented over NMSB bits being also available at the output. At least three forms of processing are sequentially applied to the two outputs, the first form of processing (201) comprising a demodulation by a frequency f
0 and an N-factor decimation (202, 203) in an independent manner, the second form of processing (204) comprising an improvement of the resolution and the third form of processing (208) comprising a correction of the distortions, the three forms of processing being carried out after decimation. The invention also relates to a sigma-delta modulator implementing the method of the invention.
0 and an N-factor decimation (202, 203) in an independent manner, the second form of processing (204) comprising an improvement of the resolution and the third form of processing (208) comprising a correction of the distortions, the three forms of processing being carried out after decimation. The invention also relates to a sigma-delta modulator implementing the method of the invention.
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