发明名称 |
Digital to analog converter with gradient error correction |
摘要 |
A digital-to-analog converter is disclosed. The converter includes a gradient correction module that generates a correction term based on a model of gradient error. The correction term is then applied to the signal path in the digital domain or applied to the output of the digital-to-analog converter in the analog domain. The model used to generate the correction term is based on a vertical gradient error in the array of current source elements, which may be modelled and calibrated using a second-order polynomial. Further, a digital-to-analog converter having a Nyquist DAC and an oversampled DAC is disclosed. When the oversampled DAC is enabled, the resolution of the Nyquist DAC may be increased while slowing the conversion rate.
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申请公布号 |
EP2579463(A1) |
申请公布日期 |
2013.04.10 |
申请号 |
EP20110183730 |
申请日期 |
2011.10.03 |
申请人 |
RESEARCH IN MOTION LIMITED |
发明人 |
MUHAMMAD, KHURRAM;MANKU, TAJINDER;LEBEDEV, SEMYON |
分类号 |
H03M1/10;H03M1/06;H03M1/20;H03M1/68;H03M1/74;H03M3/02;H03M3/04;H03M7/30 |
主分类号 |
H03M1/10 |
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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