-
公开(公告)号：US11043929B2
公开(公告)日：2021-06-22
申请号：US16702793
申请日：2019-12-04
Applicant: NXP B.V.
Inventor： Steve Charpentier , Stefan Mendel , Ulrich Andreas Muehlmann , Helmut Kranabenter
Abstract: Embodiments of methods and systems for gain control in a communications device are described. In an embodiment, a method for gain control in a communications device involves detecting a change in an amplification gain that is applied to an analog signal in the communications device and compensating for the change in the amplification gain by manipulating an amplitude of a digital signal that is converted from the analog signal. Other embodiments are also described.
-
公开(公告)号：US10044389B2
公开(公告)日：2018-08-07
申请号：US14684318
申请日：2015-04-10
Applicant: NXP B.V.
Inventor： Erich Merlin , Helmut Kranabenter , Stefan Mendel , Michael Pieber
CPC classification number: H04B1/123 , G06K7/0008 , H04B1/1036 , H04W72/0446
Abstract: There is described a contactless communication device. The device comprises (a) a receiver unit (110, 610) having an antenna input (RXn, Vmid, RXp) for connecting to an antenna, the receiver unit (110, 610) being adapted to couple with a transmitting device and to receive an RF signal transmitted by the transmitting device, the receiver unit (110, 610) being further adapted to determine a point of time relating to a position of data within the RF signal, (b) a comparator (120) adapted to generate a comparator output signal (agc_comp) which is indicative of a relation between a voltage at the antenna input (RXn, Vmid, RXp) of the receiver unit (110, 610) and a reference voltage (Vref), and (c) a voltage regulation circuit coupled to the comparator (120) and to the antenna input (RXn, Vmid, RXp) of the receiver unit (110, 610), the voltage regulation circuit being adapted to repetitively regulate the voltage at the antenna input (RXn, Vmid, RXp) based on the comparator output signal (agc_comp). The voltage regulation circuit is adapted to separate each repetitive regulation of the voltage at the antenna input (RXn, Vmid, RXp) by a first time constant prior to the point of time determined by the receiver unit (110, 610) and by a second time constant after the point of time determined by the receiver unit (110, 610), wherein the first time constant is smaller than the second time constant. There is also described a method, a computer program and a computer program product.
-
公开(公告)号：US20170288916A1
公开(公告)日：2017-10-05
申请号：US15087524
申请日：2016-03-31
Applicant: NXP B.V.
Inventor： Stefan Mendel , Michael Pieber
IPC: H04L25/03 , H04L25/02 , H04B17/318
CPC classification number: H04L25/03847 , H03G3/3078 , H04B17/318 , H04L25/0262
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.
-
4.发明授权公开(公告)号：US11171687B2
公开(公告)日：2021-11-09
申请号：US16691959
申请日：2019-11-22
Applicant: NXP B.V.
Inventor： Steve Charpentier , Ulrich Andreas Muehlmann , Stefan Mendel
Abstract: 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 detecting a falling signal edge corresponding to a received signal at the communications device based on a falling signal edge threshold, detecting a rising signal edge corresponding to the received signal based on a rising signal edge threshold, where the rising signal edge threshold is independent from the falling signal edge threshold, and decoding the received signal based on the detected falling signal edge and the detected rising signal edge. Other embodiments are also described.
-
公开(公告)号：US10735038B2
公开(公告)日：2020-08-04
申请号：US15907544
申请日：2018-02-28
Applicant: NXP B.V.
Inventor： Radha Srinivasan , Ulrich Andreas Muehlmann , Frederic Benoist , Stefan Mendel , Steve Charpentier
IPC: H04B1/12 , H04B17/318 , H04B5/00 , H03M1/06 , H03M1/12
Abstract: Embodiments are provided for a method of operating a receiver system, the receiver system comprising one or more channels, the method comprising: monitoring a residual DC (direct current) offset in a present channel by sampling an output of an analog-to-digital converter (ADC) of the present channel; adjusting a DCO (direct current offset) correction signal that corresponds to the residual DC offset in response to an absolute value of the residual DC offset exceeding a programmable DCO threshold; and subtracting the DCO correction signal from an analog signal provided to the ADC to reduce the residual DC offset below the programmable DCO threshold.
-
Patent Agency Ranking
公开(公告)号：US10102467B1
公开(公告)日：2018-10-16
申请号：US15630860
申请日：2017-06-22
Applicant: NXP B.V.
Inventor： Stefan Mendel , Ulrich Andreas Muehlmann , Dominik Kurzmann
CPC classification number: G06K19/0724 , G06K19/07749 , H04B1/0021 , H04B5/0031 , H04B5/0075 , H04W4/80
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.
-
公开(公告)号：US09996786B1
公开(公告)日：2018-06-12
申请号：US15630823
申请日：2017-06-22
Applicant: NXP B.V.
Inventor： Stefan Mendel , Ulrich Andreas Muehlmann , Dominik Kurzmann
CPC classification number: G06K19/0724 , G06K19/07 , G06K19/077 , G06K19/07749 , H04B1/16 , H04B5/00 , H04B5/0031 , H04B5/0075 , H04L27/38 , H04W4/00 , H04W4/80
Abstract: Various embodiments relate to a method and apparatus for a method for under sampling a RF carrier signal, the method including receiving, by an analog digital converter, the RF carrier signal, selecting, by a multiplexer, a clock signal which includes a first clock signal and a second clock signal which are phase shifted, receiving, by the ADC, the clock signal which has a frequency less that the frequency of the RF carrier signal, sampling, by the ADC, the RF carrier signal using the selected clock signal and demodulating, by a digital signal processor, the RF carrier signal into I channel data and Q channel data for I/Q demodulation.
-
8.发明申请CONTACTLESS COMMUNICATION DEVICE WITH RECEIVER INPUT VOLTAGE STABILIZATION 审中-公开具有接收器输入电压稳定的无连接通信设备公开(公告)号：US20150295608A1
公开(公告)日：2015-10-15
申请号：US14684318
申请日：2015-04-10
Applicant: NXP B.V.
Inventor： Erich Merlin , Helmut Kranabenter , Stefan Mendel , Michael Pieber
CPC classification number: H04B1/123 , G06K7/0008 , H04B1/1036 , H04W72/0446
Abstract: There is described a contactless communication device. The device comprises (a) a receiver unit (110, 610) having an antenna input (RXn, Vmid, RXp) for connecting to an antenna, the receiver unit (110, 610) being adapted to couple with a transmitting device and to receive an RF signal transmitted by the transmitting device, the receiver unit (110, 610) being further adapted to determine a point of time relating to a position of data within the RF signal, (b) a comparator (120) adapted to generate a comparator output signal (agc_comp) which is indicative of a relation between a voltage at the antenna input (RXn, Vmid, RXp) of the receiver unit (110, 610) and a reference voltage (Vref), and (c) a voltage regulation circuit coupled to the comparator (120) and to the antenna input (RXn, Vmid, RXp) of the receiver unit (110, 610), the voltage regulation circuit being adapted to repetitively regulate the voltage at the antenna input (RXn, Vmid, RXp) based on the comparator output signal (agc_comp). The voltage regulation circuit is adapted to separate each repetitive regulation of the voltage at the antenna input (RXn, Vmid, RXp) by a first time constant prior to the point of time determined by the receiver unit (110, 610) and by a second time constant after the point of time determined by the receiver unit (110, 610), wherein the first time constant is smaller than the second time constant. There is also described a method, a computer program and a computer program product.
Abstract translation: 描述了一种非接触式通信设备。 所述设备包括（a）具有用于连接到天线的天线输入（RXn，Vmid，RXp）的接收器单元（110,610），所述接收器单元（110,610）适于与发射设备耦合并且接收 由发射设备发射的RF信号，接收机单元（110,610）还适于确定与RF信号内的数据位置有关的时间点，（b）比较器（120），适于产生比较器 输出信号（agc_comp），其指示接收器单元（110,610）的天线输入端（RXn，Vmid，RXp）处的电压与参考电压（Vref）之间的关系，以及（c）电压调节电路 耦合到所述比较器（120）和所述接收器单元（110,610）的所述天线输入端（RXn，Vmid，RXp），所述电压调节电路适于重复地调节所述天线输入端的电压（RXn，Vmid，RXp ）基于比较器输出信号（agc_comp）。 电压调节电路适于在由接收器单元（110,610）确定的时间点之前将天线输入端（RXn，Vmid，RXp）处的电压的每次重复调节分离第一时间常数，并且将第二时间 在由接收器单元（110,610）确定的时间点之后的时间常数，其中第一时间常数小于第二时间常数。 还描述了一种方法，计算机程序和计算机程序产品。
-
9.发明申请公开(公告)号：US20150031315A1
公开(公告)日：2015-01-29
申请号：US14321433
申请日：2014-07-01
Applicant: NXP B.V.
Inventor： Michael Pieber , Erich Merlin , Stefan Mendel
IPC: H04B1/44
CPC classification number: H04B1/44 , H04B5/0075 , H04B5/02
Abstract: There is described an RF bidirectional communication device utilizing active load modulation, the device comprising (a) a resonance circuit including an antenna (326), and (b) a control unit (322) for controlling communication of the device, including switching between a transmission mode and a receiving mode, wherein the control unit is adapted to (c) modify a configuration of the resonance circuit such that the resonance circuit has a first resonance frequency (f0) when the device is in the transmission mode and a second resonance frequency (f0+Δf) when the device is in the receiving mode, and (d) modify the configuration of the resonance circuit such that a Q-factor of the resonance circuit is periodically decreased while the device is in the transmission mode. There is also described a corresponding method and a system comprising a RF device and a reader/writer device. Furthermore, there is described a computer program and a computer program product.
Abstract translation: 描述了利用有源负载调制的RF双向通信装置，该装置包括（a）包括天线的谐振电路（326）和（b）用于控制装置的通信的控制单元（322），包括在 传输模式和接收模式，其中所述控制单元适于（c）修改所述谐振电路的配置，使得当所述设备处于所述传输模式时所述谐振电路具有第一谐振频率（f0），并且所述谐振电路具有第二谐振频率 （f0 +＆Dgr; f）当设备处于接收模式时，（d）修改谐振电路的配置，使得谐振电路的Q因子在器件处于传输模式时周期性地减小。 还描述了包括RF设备和读取器/写入器设备的相应方法和系统。 此外，描述了计算机程序和计算机程序产品。
-
公开(公告)号：US10291291B2
公开(公告)日：2019-05-14
申请号：US15646955
申请日：2017-07-11
Applicant: NXP B.V.
Inventor： Jingfeng Ding , Gernot Hueber , Stefan Mendel
Abstract: A contactless communication device includes a receiver unit having differential input terminals for connecting to an antenna. The receiver unit is coupled to a transmitting device and receives an RF signal transmitted by the transmitting device. A first comparator is adapted to generate a first comparator output signal indicative of a relationship between a voltage at a positive input terminal of the receiver unit and a first reference voltage. A second comparator is adapted to generate a second comparator output signal indicative of a relationship between a voltage at a negative input terminal of the receiver unit and a second reference voltage. A first voltage regulation circuit is adapted to regulate the voltage at the positive input terminal in response to the first comparator output signal. A second voltage regulation circuit is adapted to regulate the voltage at the negative input terminal in response to the second comparator output signal.
-
-
-
-
-
-
-
-
-
Search Results
27
records
(took 0.016 seconds)
