发明名称 |
DELTA SIGMA MODULATORS WITH COMPARATOR OFFSET NOISE CONVERSION |
摘要 |
Quantizers of delta sigma modulators include comparators to quantize a quantizer input signal. Each comparator compares a respective reference signal to the quantizer input signal. A logic processing module determines a quantizer output signal based upon the comparison. During subsequent periods of time, a comparator offset converter alters "reference signal-to- comparator input terminal" associations to reroute respective reference signals from one arrangement of comparator input terminals of at least two (2) of the comparators to a different arrangement of comparator input terminals. The comparator offset converter can randomly alter the reference signal-to-comparator input terminal associations. The comparator offset converter can maintain a 1 : 1 reference signal-to-comparator input terminal relationship. By maintaining the 1 : 1 ratio of reference signal-to-comparator input terminal and randomizing the reference signal-to-comparator input terminal associations, the comparator offset converter effectively converts the comparator offset voltage nonlinearities into energies and frequencies that can be constructively processed and improve signal-to-noise ratios. |
申请公布号 |
WO2007112191(A2) |
申请公布日期 |
2007.10.04 |
申请号 |
WO2007US63668 |
申请日期 |
2007.03.09 |
申请人 |
CIRRUS LOGIC, INC.;MELANSON, JOHN, L. |
发明人 |
MELANSON, JOHN, L. |
分类号 |
H03M3/04 |
主分类号 |
H03M3/04 |
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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