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公开(公告)号：US20180269929A1
公开(公告)日：2018-09-20
申请号：US15462771
申请日：2017-03-17
申请人： NXP B.V.
发明人： Jingfeng Ding , Ghiath Al-kadi , Erich Merlin
CPC分类号： H04B5/0037 , G06K7/10168 , H01Q1/242 , H04B5/0031 , H04B5/005 , H04B5/0062 , H04W4/80
摘要： A near field communication (NFC) device capable of operating by being powered by the field includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. An electromagnetic compatibility (EMC) filter of the NFC device is coupled to the NFC module via output terminals of said NFC module. A powered by the field circuit of the NFC device is adapted to harvest energy from an external field to power said NFC device. The power by the field circuit is coupled to said EMC filter via one or more impedance elements. The NFC device is adapted to be able to operate in one of a reader mode, a battery supplied card mode, and a powered by the field card mode.
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公开(公告)号：US20170070245A1
公开(公告)日：2017-03-09
申请号：US14847810
申请日：2015-09-08
申请人： NXP B.V.
发明人： Stefan Mendel , Thomas Noisternig , Jingfeng Ding , Erich Merlin , Michael Stark
CPC分类号： H04B1/04 , G06K7/10237 , G06K19/0723 , H04B5/0031 , H04L25/00 , H04L25/03006 , H04W4/80
摘要： Transients caused by load modulation can fee compensated far by adjusting pulse shapes. A radio frequency (RP) carrier signal can be modulated using load modulation. For the modulated RF carrier signal a particular pattern can be detected for a symbol period that precedes a second symbol that does not use load modulation. In response to the detecting, a pulse shape of the first symbol can be adjusted to mitigate the transients.
摘要翻译： 负载调制引起的瞬变可以通过调整脉冲形状进行费用补偿。 可以使用负载调制来调制射频（RP）载波信号。 对于调制的RF载波信号，可以在不使用负载调制的第二符号之前的符号周期中检测特定模式。 响应于检测，可以调整第一符号的脉冲形状以减轻瞬变。
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公开(公告)号：US20140179226A1
公开(公告)日：2014-06-26
申请号：US14195687
申请日：2014-03-03
申请人： NXP B.V.
发明人： Harald Witschnig , Erich Merlin , Alexander Maier
IPC分类号： H04W4/00
CPC分类号： H04W4/008 , H04B5/0031 , H04B5/0056 , H04B5/0075 , H04B5/0081 , H04B5/02 , H04W4/80
摘要： A radio frequency communication device has data transmission means and data receiving means. The data transmission means comprise load modulating means being adapted to receive a radio frequency carrier signal emitted by another RF communication device and to modulate the RF carrier signal by means of load modulation in accordance with data to be sent. The data receiving means comprise a RF frequency carrier signal generator being adapted to emit a radio frequency carrier signal and load demodulating means being connected to an emission path of the radio frequency carrier signal and demodulating the radio frequency carrier signal when it has been load modulated by another RF communication device.
摘要翻译： 射频通信装置具有数据发送装置和数据接收装置。 数据传输装置包括负载调制装置，其适于接收由另一RF通信装置发射的射频载波信号，并根据要发送的数据通过负载调制来调制RF载波信号。 数据接收装置包括RF频率载波信号发生器，其适于发射射频载波信号，并且负载解调装置连接到射频载波信号的发射路径，并且当其被载波调制时解调该射频载波信号 另一个RF通信设备。
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公开(公告)号：US20240204743A1
公开(公告)日：2024-06-20
申请号：US18082352
申请日：2022-12-15
申请人： NXP B.V.
发明人： Erich Merlin , Manoj Kurvathodil
CPC分类号： H03H7/38 , H03H7/42 , H04B1/40 , H04B5/0031
摘要： In one example, the present disclosure includes a circuit-based apparatus including a resonance tank circuit, a signal source, and a single-ended circuit. The signal source provides a plurality of complementary signals (e.g., differential signals) for processing by the resonance tank circuit where the complementary signals are combined to a signal at a node for presentation to the single-ended circuit (e.g., antenna or receiver). For example, the resonance tank circuit, which has a resonance frequency set for a transfer of power to the load and which may be impedance matched to the single-ended circuit, converts the complementary signals to the node for carrying the signal to the single-ended circuit.
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公开(公告)号：US11038553B2
公开(公告)日：2021-06-15
申请号：US16215173
申请日：2018-12-10
申请人： NXP B.V.
发明人： Jingfeng Ding , Gernot Hueber , Erich Merlin
IPC分类号： H04B5/00
摘要： A near field communication (NFC) device capable of operating by being powered by the field includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. The device includes an RF front end coupled between said NFC module and said antenna circuit. The RF front end includes a balanced to unbalanced (Balun) transformer and a tuning capacitor to provide a function of an electromagnetic compatibility (EMC) filter. A powered by the field circuit of the NFC device is adapted to harvest energy from an external field to power said NFC device. The power by the field circuit is coupled to said Balun transformer via one or more impedance elements.
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公开(公告)号：US20200186199A1
公开(公告)日：2020-06-11
申请号：US16215173
申请日：2018-12-10
申请人： NXP B.V.
发明人： Jingfeng Ding , Gernot Hueber , Erich Merlin
IPC分类号： H04B5/00
摘要： A near field communication (NFC) device capable of operating by being powered by the field includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. The device includes an RF front end coupled between said NFC module and said antenna circuit. The RF front end includes a balanced to unbalanced (Balun) transformer and a tuning capacitor to provide a function of an electromagnetic compatibility (EMC) filter. A powered by the field circuit of the NFC device is adapted to harvest energy from an external field to power said NFC device. The power by the field circuit is coupled to said Balun transformer via one or more impedance elements.
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公开(公告)号：US20190195981A1
公开(公告)日：2019-06-27
申请号：US15853038
申请日：2017-12-22
申请人： NXP B.V.
发明人： Jingfeng Ding , Ghiath Al-kadi , Erich Merlin
CPC分类号： G01S5/10 , G01S1/02 , G01S3/50 , G01S5/0231 , G01S5/0242 , G01S5/04 , G01S5/08
摘要： Embodiments of methods for determining a location of a mobile device, a mobile device, and a location beacon system are described. In an embodiment, a method for determining a location of a mobile device involves receiving, at a dual-antenna receiver of the mobile device, a plurality of ultra wide band (UWB) signals from a group of unsynchronized beacons having a quadrilateral formation, at the mobile device, determining angle of arrival (AoA) information from the UWB signals, and at the mobile device, calculating the location of the mobile device based on the AoA information. Other embodiments are also described.
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8.发明申请公开(公告)号：US20190097687A1
公开(公告)日：2019-03-28
申请号：US15715027
申请日：2017-09-25
申请人： NXP B.V.
发明人： Gernot Hueber , Erich Merlin , Johannes Bruckbauer
IPC分类号： H04B5/00
CPC分类号： H04B5/0075 , H04B5/0031 , H04B17/11 , H04B17/21
摘要： Embodiments of methods and systems for operating a communications device that communicates via inductive coupling are described. In an embodiment, a method for operating a communications device that communicates via inductive coupling involves adjusting a configuration of the communications device in response to a clock signal that is synchronized to a received clock signal, obtaining information that corresponds to transmission current or power generated in response to the adjusted configuration, and quantifying a detuning condition in response to the obtained information. Other embodiments are also described.
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公开(公告)号：US10237000B1
公开(公告)日：2019-03-19
申请号：US15973724
申请日：2018-05-08
申请人： NXP B.V.
摘要： A method for compensating phase shift is provided. The method includes sweeping a transmitter (TX) clock frequency over a frequency range and sampling resistance values at a receiver (RX) circuit while sweeping the TX clock frequency. A first frequency in the frequency range is determined which corresponds to a maximum resistance value sampled at the RX circuit. Using a look-up table (LUT), a phase adjust value is determined based on the first frequency. A phase of the TX clock is adjusted based on the phase adjust value.
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公开(公告)号：US10110281B2
公开(公告)日：2018-10-23
申请号：US15462771
申请日：2017-03-17
申请人： NXP B.V.
发明人： Jingfeng Ding , Ghiath Al-kadi , Erich Merlin
摘要： A near field communication (NFC) device capable of operating by being powered by the field includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. An electromagnetic compatibility (EMC) filter of the NFC device is coupled to the NFC module via output terminals of said NFC module. A powered by the field circuit of the NFC device is adapted to harvest energy from an external field to power said NFC device. The power by the field circuit is coupled to said EMC filter via one or more impedance elements. The NFC device is adapted to be able to operate in one of a reader mode, a battery supplied card mode, and a powered by the field card mode.
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