发明名称 |
METHODS AND APPARATUS FOR DECORRELATING QUANTIZATION NOISE IN A DELTA-SIGMA MODULATOR |
摘要 |
Methods and apparatus are provided for decorrelating quantization noise in a delta-sigma modulator. An input signal is quantized using a predictive delta-sigma modulator, by quantizing the input signal using a quantizer; determining a quantization error associated with the quantizer by subtracting an input to the quantizer from an output of the quantizer; measuring a correlation coefficient between the quantization error and an input to the quantizer; reducing the measured correlation by subtracting a multiple of the input to the quantizer from the quantization error, wherein the multiple is based on the correlation coefficient; generating an error prediction value using an error predictive filter; and subtracting the error prediction value from the input signal.
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申请公布号 |
US2010245138(A1) |
申请公布日期 |
2010.09.30 |
申请号 |
US20090415012 |
申请日期 |
2009.03.31 |
申请人 |
AZADET KAMERAN;HIJAZI SAMER;OTHMER JOSEPH H |
发明人 |
AZADET KAMERAN;HIJAZI SAMER;OTHMER JOSEPH H. |
分类号 |
H03M1/06;H03M3/00 |
主分类号 |
H03M1/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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