发明名称 |
Double balanced digital transmitter |
摘要 |
A digital-to-analog upconverter directly converts a baseband digital value comprising a plurality of bits to an RF analog signal to combine digital-to-analog operations with frequency upconversion operations. One exemplary digital-to-analog upconverter comprises a plurality of conversion units, one for each of the plurality of bits in the baseband digital value, and an output node coupled to each of the conversion units. Each conversion unit generates a weighted analog signal at a low frequency or at a radio frequency responsive to the corresponding input bit and an oscillator signal at RF. The weighting factor of each conversion unit corresponds to a relative weighting of the corresponding bit. The output node combines the weighted analog signals to generate a combined RF analog signal representative of the baseband digital value.
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申请公布号 |
US8451157(B2) |
申请公布日期 |
2013.05.28 |
申请号 |
US201113076717 |
申请日期 |
2011.03.31 |
申请人 |
VILHONEN SAMI;ESKOLA RAMI TAPANI;ST-ERICSSON SA |
发明人 |
VILHONEN SAMI;ESKOLA RAMI TAPANI |
分类号 |
H03M1/66 |
主分类号 |
H03M1/66 |
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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