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公开(公告)号：US11025302B2
公开(公告)日：2021-06-01
申请号：US16849062
申请日：2020-04-15
Applicant: NXP B.V.
Inventor： Steve Charpentier , Stefan Mendel , Ulrich Andreas Muehlmann
IPC: H04B5/00
Abstract: A contactless communication device includes a near field communication (NFC) module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna 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 and further includes a detection module coupled to said NFC module for detecting an end of a PauseA of an incoming RF signal by monitoring an amplitude of a digital output signal derived from the incoming RF signal. The detection module detects the PauseA in said digital output signal by comparing the amplitude of said output digital signal to a first level. The detection module further detects the end of the PauseA in said digital output signal by comparing the amplitude of said digital output signal to a second level.
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22.发明申请公开(公告)号：US20200187032A1
公开(公告)日：2020-06-11
申请号：US16690210
申请日：2019-11-21
Applicant: NXP B.V.
Inventor： Steve CHARPENTIER , Ulrich Andreas Muehlmann , Stefan Mendel
Abstract: A contactless communication device includes a near field communication (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 and further includes a protocol detection circuit for detecting a protocol mode in response to an incoming signal received by the device. The protocol detection circuit includes a plurality of filters being adapted to generate an envelope of the incoming signal; a plurality of decoders being adapted to generate an output in response to a respective envelope generated by a corresponding one of the plurality of filters; and a decision unit being adapted to detect a protocol mode based on the output from each of the plurality of decoders.
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Patent Agency Ranking
公开(公告)号：US10574281B1
公开(公告)日：2020-02-25
申请号：US16236272
申请日：2018-12-28
Applicant: NXP B.V.
Inventor： Ulrich Andreas Muehlmann , Radha Srinivasan , Stefan Mendel
Abstract: A device includes a near field communication (NFC) module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna coupled to and driven by the NFC module with the modulated carrier signal. The device includes an analog front end coupled between the NFC module and the antenna. The device further includes a digital gain control (DGC) block for controlling gains in a first and second baseband amplifiers (BBAs). The DGC block includes a first clipping detector for correlating in-phase input signals with a subcarrier pattern and a second clipping detector for correlating quadrature input signals with the subcarrier pattern, and further includes a signal energy correction block adapted to output a number of correction ticks for a numerically controlled oscillator (NCO) based on a number of gain updates performed for the first or the second BBAs.
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公开(公告)号：US10181970B2
公开(公告)日：2019-01-15
申请号：US15087524
申请日：2016-03-31
Applicant: NXP B.V.
Inventor： Stefan Mendel , Michael Pieber
IPC: H04L25/03 , H04B17/318 , H04L25/02
Abstract: Embodiments of a method and a system controlling an amplifier of a communications device are disclosed. In an embodiment, a method for controlling an amplifier of a communications device involves checking for a data reception at the communications device and freezing a gain of the amplifier if the data reception is detected.
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公开(公告)号：US10127487B1
公开(公告)日：2018-11-13
申请号：US15630860
申请日：2017-06-22
Applicant: NXP B.V.
Inventor： Stefan Mendel , Ulrich Andreas Muehlmann , Dominik Kurzmann
Abstract: Various embodiments relate to a method and apparatus for over sampling a RF carrier signal, the method including receiving, by an ADC, the RF carrier signal, sampling, by the ADC, the RF carrier signal using the selected clock signal which is at least quadruple the RF carrier signal, down sampling, by a RF-DSP, the RF carrier signal by a factor of two to generate I channel data and Q channel data, mixing down, by the RF-DSP, the I channel data and the Q channel data, and outputting, by the RF-DSP, the I channel data and Q channel data to a baseband DSP.
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公开(公告)号：US20170288795A1
公开(公告)日：2017-10-05
申请号：US15087037
申请日：2016-03-31
Applicant: NXP B.V.
Inventor： Jingfeng Ding , Helmut Kranabenter , Stefan Mendel , Gernot Hueber , Josef Zipper
IPC: H04B17/318
CPC classification number: H04B17/318 , H03M1/181 , H04W52/245 , H04W52/52
Abstract: Embodiments of a method and a system for generating a received signal strength indicator (RSSI) value that corresponds to a radio frequency (RF) signal are disclosed. In an embodiment, a method for generating an RSSI value that corresponds to an RF signal involves obtaining an attenuation factor code in response to applying an automatic gain control (AGC) operation to the RF signal, obtaining an analog-to-digital converter (ADC) code in response to applying an ADC operation to a signal that results from the AGC operation, and combining the attenuation factor code and the ADC code to generate an RSSI value. Other embodiments are also described.
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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
Applicant: NXP B.V.
Inventor： Stefan Mendel , Thomas Noisternig , Jingfeng Ding , Erich Merlin , Michael Stark
CPC classification number: H04B1/04 , G06K7/10237 , G06K19/0723 , H04B5/0031 , H04L25/00 , H04L25/03006 , H04W4/80
Abstract: 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.
Abstract translation: 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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