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1.发明公开METHOD AND SYSTEM FOR GENERATING A RECEIVED SIGNAL STRENGTH INDICATOR (RSSI) VALUE FROM A RADIO FREQUENCY (RF) SIGNAL 审中-公开用于从射频（RF）信号生成接收的信号强度指示符（RSSI）值的方法和系统
公开(公告)号：EP3226447A1
公开(公告)日：2017-10-04
申请号：EP17155230.0
申请日：2017-02-08
申请人： NXP B.V.
IPC分类号： H04B17/318 , H03M1/18
CPC分类号： H04B17/318 , H03M1/181 , H04W52/245 , H04W52/52
摘要： 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.
摘要翻译： 公开了用于生成对应于射频（RF）信号的接收信号强度指示符（RSSI）值的方法和系统的实施例。 在一个实施例中，用于产生对应于RF信号的RSSI值的方法涉及响应于对RF信号应用自动增益控制（AGC）操作来获得衰减因子代码，获得模数转换器（ADC ）代码以响应于对由AGC操作产生的信号应用ADC操作，并且组合衰减因子代码和ADC代码以生成RSSI值。 还描述了其他实施例。
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公开(公告)号：EP4213393A1
公开(公告)日：2023-07-19
申请号：EP23151811.9
申请日：2023-01-16
申请人： NXP B.V.
摘要： A calibration system comprises an actuator circuit comprising a first delay circuit that receives a plurality of data pulses and a second delay circuit that receives the pulses, wherein one of the first and second delay circuits delays the data pulses independently of the other of the first and second delay circuits; a data switch that receives an output of the actuator circuit including delay data signals of the data pulses from the first and second delay circuits and switches and outputs a plurality of local oscillator (LO) signals for output as a controlled LO signal according to control signals of the delay data signals and applied to the data switch. At least one calibration switch receives the output of the actuator circuit and the plurality of LO+ and LO- signals, and outputs a second controlled LO signal output to a sense circuit.
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公开(公告)号：EP1474776B1
公开(公告)日：2008-11-26
申请号：EP03700169.0
申请日：2003-01-23
申请人： NXP B.V.
发明人： KRANABENTER, Helmut
IPC分类号： G06K19/07
CPC分类号： G06K19/0701 , G06K19/0715 , G06K19/0723
摘要： In a data carrier (1) for contactless communication with a base station (2) across an electromagnetic field (HF) generated by the base station (2), coil voltage control means (16) are arranged for controlling the unmodulated coil voltage (US) of the received signal (ES), the coil voltage control means (16) being arranged for control in response to an essentially decreasing coil voltage (US) when the field strength of the electromagnetic field (HF) increases.
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公开(公告)号：EP4175175A1
公开(公告)日：2023-05-03
申请号：EP22200613.2
申请日：2022-10-10
申请人： NXP B.V.
摘要： A duty cycle correction (DCC) circuit (100) for use in relation to differential signal communications, a method of providing duty cycle correction, and communications systems and methods employing same, are disclosed herein. In one example embodiment, the circuit (100) includes a differential signal inverter circuit (110, 112) including first and second inverter circuits (132, 134), each of which has a respective inverter and respective first and second transistor devices (134, 136) respectively coupled between the respective inverter and first and second voltages (138, 140), respectively. The circuit also includes a feedback circuit (111) coupled to respective output ports (106, 108) of the respective first and second inverter circuits and also to respective feedback input ports (A, B, C, D) of the respective transistor devices (134, 136). The feedback circuit operates to provide one or more feedback signals (A, B, C, D) causing one or more of the transistor devices to perform current limiting. Respective duty cycles of output signals respectively are equal or substantially equal based on the current limiting.
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公开(公告)号：EP1774648B1
公开(公告)日：2010-09-15
申请号：EP05759065.5
申请日：2005-07-07
申请人： NXP B.V.
发明人： KRANABENTER, Helmut
CPC分类号： H04L25/061 , G06K7/0008 , G06K19/0723 , H03D1/10 , H04L27/06
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公开(公告)号：EP3672092A1
公开(公告)日：2020-06-24
申请号：EP18306752.9
申请日：2018-12-19
申请人： NXP B.V.
摘要： 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.
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