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1.发明授权公开(公告)号：US11764882B1
公开(公告)日：2023-09-19
申请号：US17839187
申请日：2022-06-13
申请人： NXP USA, Inc.
发明人： Sai-Wang Tam , Alden C. Wong , Weiwei Xu , Yui Lin , Jue Yu , Sridhar Reddy Narravula , Dipen Bakul Parikh
IPC分类号： H04B17/12 , H04B1/7107 , H04B17/16
CPC分类号： H04B17/12 , H04B1/7107 , H04B17/16
摘要： Embodiments of a calibration system for third order intermodulation distortion (IMD3) cancellation and a wireless apparatus are disclosed. In an embodiment, a calibration system for IMD3 cancellation includes a cancellation circuit for IMD3 cancellation between a first transmitter and a second transmitter, and a controller coupled to the cancellation circuit and configured to for each frequency channel of the first transmitter, perform a pre-conditional calibration of the cancellation circuit, after the pre-conditional calibration, determine a phase configuration for the cancellation circuit, and after the phase configuration for the cancellation circuit is determined, determine an attenuation configuration for the cancellation circuit.
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公开(公告)号：US20200169444A1
公开(公告)日：2020-05-28
申请号：US16527109
申请日：2019-07-31
申请人： NXP USA, Inc.
发明人： Sai-Wang Tam , Su Chenxin , Vijay Ahirwar , Rulin Huang , Alden C. Wong , Rui Cao , Sudhir Srinivasa , Alireza Razzaghi , Randy Tsang , Timothy J. Donovan
摘要： A millimeter-wave communication system includes a transmitter and a receiver. The transmitter is configured to be connected to a waveguide that is transmissive at millimeter-wave frequencies, the waveguide having a propagation parameter that varies with frequency at the millimeter-wave frequencies. The transmitter is configured to generate a millimeter-wave signal comprising multiple sub-carriers that are modulated with data, wherein each sub-carrier is modulated with a respective portion of the data and is subjected to only a respective fraction of a variation in the propagation parameter, and to transmit the millimeter-wave signal into a first end of the waveguide. The receiver is configured to receive the millimeter-wave signal from a second end of the waveguide, and to extract the data from the multiple sub-carriers.
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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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公开(公告)号：US20240339754A1
公开(公告)日：2024-10-10
申请号：US18298144
申请日：2023-04-10
申请人： NXP USA, Inc.
发明人： Sai-Wang Tam , Peter Thüringer , Rui Cao , Franz Amtmann , Daniel Lopez-Diaz , Yoganathan Sivakumar , Ulrich Andreas Muehlmann , Randy Ping Leong Tsang
CPC分类号： H01Q3/46 , H01Q1/2291 , H01Q3/34
摘要： A scalable reconfigurable intelligent surface (RIS) includes a plurality of RIS elements. The RIS elements include: a radio frequency identification (RFID) chip that powers the RIS element; a RFID antenna connected to the RFID chip; a RIS variable impedance controlled by the RFID chip; and a RIS antenna connected to the RIS variable impedance. The plurality of RIS elements produces a reflection beam that may be directed to a specific location. The RFID chip receives steering information to steer the reflection beam.
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5.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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公开(公告)号：US11374615B1
公开(公告)日：2022-06-28
申请号：US17205591
申请日：2021-03-19
申请人： NXP USA, Inc.
发明人： Sai-Wang Tam , Alden C. Wong , Weiwei Xu , Yui Lin , Jue Yu , Sridhar Reddy Narravula , Yi-Ling Chao , Dipen Bakul Parikh
摘要： Various embodiments relate to a cancellation circuit configured to generate a cancellation signal, including: an attenuator configured to attenuate a transmitted signal from an aggressor transmitter based upon a first attenuation value; an I/Q demodulator configured to split an attenuated signal into in-phase (I) and quadrature signals (Q); a phase interpolator configured to apply a calibration phase shift and a calibration attenuation to the I signal and Q signal and to recombine the I and Q signals; an auxiliary balun coupled to an output of the phase interpolator; and an auxiliary power amplifier with an input connected to the auxiliary balun configured to generate the cancellation signal, wherein the output of the auxiliary power amplifier is connected to an output of a victim transmitter.
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公开(公告)号：US20240204819A1
公开(公告)日：2024-06-20
申请号：US18083937
申请日：2022-12-19
申请人： NXP USA, Inc.
发明人： Sai-Wang Tam , Aristotele Hadjichristos , Steven Daniel , Krishnan Tiruchi Natarajan , John Quigley
IPC分类号： H04B1/40 , H03H7/38 , H03K5/01 , H03K17/687
CPC分类号： H04B1/40 , H03H7/38 , H03K5/01 , H03K17/6874 , H03K2005/00019
摘要： Provided is a contactless connector that includes an antenna system and a wireless transceiver coupled to the antenna system and configured to simultaneously transmit a transmission signal and receive a received signal through the antenna system. The wireless transceiver includes a transformer, a wide-band phase shifter and a combiner. The transformer has a primary coil with a center tap to which the transmission signal is coupled and a first end that is coupled to the antenna system. The transmission signal also is coupled to an input of the wide-band phase shifter. The transformer also has a secondary coil, an output of the secondary coil is coupled to a first input of the combiner, an output of the wide-band phase shifter is coupled to a second input of a combiner, and an output of the combiner provides a self-interference-canceled version of the received signal.
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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：US11381441B2
公开(公告)日：2022-07-05
申请号：US16527109
申请日：2019-07-31
申请人： NXP USA, Inc.
发明人： Sai-Wang Tam , Su Chenxin , Vijay Ahirwar , Rulin Huang , Alden C. Wong , Rui Cao , Sudhir Srinivasa , Alireza Razzaghi , Randy Tsang , Timothy J. Donovan
摘要： A millimeter-wave communication system includes a transmitter and a receiver. The transmitter is configured to be connected to a waveguide that is transmissive at millimeter-wave frequencies, the waveguide having a propagation parameter that varies with frequency at the millimeter-wave frequencies. The transmitter is configured to generate a millimeter-wave signal comprising multiple sub-carriers that are modulated with data, wherein each sub-carrier is modulated with a respective portion of the data and is subjected to only a respective fraction of a variation in the propagation parameter, and to transmit the millimeter-wave signal into a first end of the waveguide. The receiver is configured to receive the millimeter-wave signal from a second end of the waveguide, and to extract the data from the multiple sub-carriers.
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