发明名称 |
Phase noise shaping using sigma delta modulation in a timing recovery unit |
摘要 |
A method and apparatus for converting a high precision digital word into a high precision analog signal is disclosed. A sigma delta modulator applies a digital input signal to a dither signal to generate a combined signal for sampling. A digital-to-analog converter quantizes the combined signal. An analog filter provides a cutoff at a bandwidth of interest to remove out of band quantization noise and signals. An I transfer function and a Q transfer function can be coupled between the sigma delta modulator and the digital-to-analog converter for mapping of the combined signal. The apparatus can also include a phase interpolator for receiving the output signal and outputting a clock recovery phase.
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申请公布号 |
US7720160(B1) |
申请公布日期 |
2010.05.18 |
申请号 |
US20060639656 |
申请日期 |
2006.12.14 |
申请人 |
MAXIM INTEGRATED PRODUCTS, INC. |
发明人 |
GORECKI JAMES L.;LIU TONG |
分类号 |
H04B14/06;H03M1/20;H04L7/00 |
主分类号 |
H04B14/06 |
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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