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公开(公告)号：US10009050B2
公开(公告)日：2018-06-26
申请号：US15367439
申请日：2016-12-02
发明人： Yangjian Chen , Bernard Mark Tenbroek , Chien-Wei Tseng , Ian Tseng , Ming-Da Tsai , Chien-Cheng Lin
CPC分类号： H04B1/0475 , H04L25/49
摘要： A quadrature transmitter is described that comprises: a first transmitter path and a second transmitter path that are matched. Each transmitter path comprises: at least one input arranged to receive respective first or second sets of quadrature baseband signals; at least one local oscillator, LO, port configured to receive respective first and second sets of quadrature LO signals; at least one mixer stage coupled to the at least one input and configured to respectively multiply the sets of quadrature baseband signals with the respective first or second sets of quadrature LO signals to produce a respective output radio frequency, RF, signal; and a combiner configured to combine the output radio frequency signals of the first transmitter path and the second transmitter path. The first set of quadrature signals is a substantially 45° phase shifted version of the second set of quadrature signals; and the first set of quadrature LO signals is a reverse substantially 45° phase shifted version of the second set of quadrature LO signals.
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公开(公告)号：US10419046B2
公开(公告)日：2019-09-17
申请号：US16002355
申请日：2018-06-07
发明人： Yangjian Chen , Bernard Mark Tenbroek , Chien-Wei Tseng , Ian Tseng , Ming-Da Tsai , Chien-Cheng Lin
摘要： A quadrature transmitter includes a first and second matched transmitter path. Each transmitter path receives respective sets of quadrature baseband signals. At least one local oscillator port receives respective sets of quadrature LO signals. Mixer stage(s) respectively multiply the sets of quadrature baseband signals with the respective sets of quadrature LO signals to produce a respective output radio frequency signal. A combiner combines the output RF signals. The first set of quadrature signals is a substantially 45° phase shifted version of the second set of quadrature signals; and the first set of quadrature LO signals is a reverse substantially 45° phase shifted version of the second set of quadrature LO signals. A baseband error correction circuit corrects a phase error between the quadrature baseband signals at baseband and a LO error correction circuit corrects a phase error between the quadrature baseband signals at a LO frequency.
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公开(公告)号：US20180302111A1
公开(公告)日：2018-10-18
申请号：US16002355
申请日：2018-06-07
发明人： Yangjian Chen , Bernard Mark Tenbroek , Chien-Wei Tseng , Ian Tseng , Ming-Da Tsai , Chien-Cheng Lin
CPC分类号： H04B1/0483 , H04B1/0475 , H04B1/525 , H04B2001/0408 , H04B2001/0416 , H04B2001/045 , H04B2001/0491 , H04L27/0014 , H04L27/364 , H04L2027/0016
摘要： A quadrature transmitter includes a first and second matched transmitter path. Each transmitter path receives respective sets of quadrature baseband signals. At least one local oscillator port receives respective sets of quadrature LO signals. Mixer stage(s) respectively multiply the sets of quadrature baseband signals with the respective sets of quadrature LO signals to produce a respective output radio frequency signal. A combiner combines the output RF signals. The first set of quadrature signals is a substantially 45° phase shifted version of the second set of quadrature signals; and the first set of quadrature LO signals is a reverse substantially 45° phase shifted version of the second set of quadrature LO signals. A baseband error correction circuit corrects a phase error between the quadrature baseband signals at baseband and a LO error correction circuit corrects a phase error between the quadrature baseband signals at a LO frequency.
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