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公开(公告)号：US11777538B2
公开(公告)日：2023-10-03
申请号：US17649332
申请日：2022-01-28
申请人： NXP USA, Inc.
发明人： Sai-Wang Tam , Xiao Xiao , Alden C Wong , Ovidiu Carnu
CPC分类号： H04B1/04 , H03F3/45475 , H04B17/13 , H03F2200/06 , H03F2200/451 , H04B2001/045
摘要： An electronic circuit includes a differential output circuit that produces a differential output signal at a differential output. A primary winding of a balun has a first balun terminal coupled to a first differential output terminal, and a second balun terminal coupled to a second differential output terminal. A configurable harmonic reduction circuit includes first and second configurable shunt capacitance circuits coupled between the first differential output terminal or the second differential output terminal, respectively, and a ground reference node. A control circuit receives tuning data associated with a calibrated tuning state. The tuning data indicates a first and second calibrated capacitance values, which are unequal, for the first and second configurable shunt capacitance circuits, respectively. The control circuit controls the first configurable shunt capacitance circuit to have the first calibrated capacitance value, and controls the second configurable shunt capacitance circuit to have the second calibrated capacitance value.
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公开(公告)号：US20240340031A1
公开(公告)日：2024-10-10
申请号：US18296759
申请日：2023-04-06
申请人： NXP USA, Inc.
发明人： Sai-Wang Tam , Tian Liu , Alireza Razzaghi , Alden C. Wong , Ovidiu Carnu , Wai Lau , Sridhar Reddy Narravula , Yui Lin , Sudhir Srinivasa
CPC分类号： H04B1/0475 , G04F10/005 , H03M1/1014 , H04B2001/0408
摘要： A cancellation circuit includes a limiter connected to an output of a first transmitter power amplifier that converts in input sinewave to a digital square wave and a digital to time converter (DTC) connected to the limiter. A RF digital to RF converter is connected to the DTC that converts the digital square wave input into an analog RF output. A cancellation amplifier with an input receives an output from the RF digital to RF converter and has an output connected to an output of a second transmitter power amplifier. The cancellation amplifier produces a cancellation signal to cancel an interference signal at the output of the second transmitter power amplifier from the output of the first transmitter power amplifier. A power detector is connected to the output of the second power amplifier that produces a power value detected at the output of the second power amplifier.
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3.发明公开公开(公告)号：US20230246658A1
公开(公告)日：2023-08-03
申请号：US17649332
申请日：2022-01-28
申请人： NXP USA, Inc.
发明人： Sai-Wang Tam , Xiao Xiao , Alden C Wong , Ovidiu Carnu
CPC分类号： H04B1/04 , H03F3/45475 , H04B17/13 , H03F2200/06 , H03F2200/451 , H04B2001/045
摘要： An electronic circuit includes a differential output circuit that produces a differential output signal at a differential output. A primary winding of a balun has a first balun terminal coupled to a first differential output terminal, and a second balun terminal coupled to a second differential output terminal. A configurable harmonic reduction circuit includes first and second configurable shunt capacitance circuits coupled between the first differential output terminal or the second differential output terminal, respectively, and a ground reference node. A control circuit receives tuning data associated with a calibrated tuning state. The tuning data indicates a first and second calibrated capacitance values, which are unequal, for the first and second configurable shunt capacitance circuits, respectively. The control circuit controls the first configurable shunt capacitance circuit to have the first calibrated capacitance value, and controls the second configurable shunt capacitance circuit to have the second calibrated capacitance value.
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