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公开(公告)号：WO2013063514A2
公开(公告)日：2013-05-02
申请号：PCT/US2012/062286
申请日：2012-10-26
Applicant: QUALCOMM INCORPORATED
Inventor： MARCU, Cristian , SAVOJ, Jafar
CPC classification number: G06K7/0008 , G06K19/0723
Abstract: Exemplary embodiments are directed to adaptive signal scaling in NFC transceivers. A transceiver may include a programmable load modulation element configured for load modulation in a tag mode. Further, the transceiver may include a sensing element for measuring an amount of power harvested by the transceiver in the tag mode. The transceiver may also include a controller configured for adjusting a depth of load modulation of the programmable load modulation element depending on the amount of power harvested.
Abstract translation: 示例性实施例涉及NFC收发器中的自适应信号缩放。 收发器可以包括被配置用于以标签模式进行负载调制的可编程负载调制元件。 此外，收发器可以包括感测元件，用于测量在标签模式中由收发器收获的功率的量。 收发器还可以包括控制器，该控制器被配置为根据收集的功率量来调整可编程负载调制元件的负载调制深度。
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公开(公告)号：WO2009079491A1
公开(公告)日：2009-06-25
申请号：PCT/US2008/086950
申请日：2008-12-16
Applicant: QUALCOMM Incorporated , CABANILLAS, Jose , GUDEM, Prasad S. , KIM, Namsoo , MARCU, Cristian , SAVLA, Anup
Inventor： CABANILLAS, Jose , GUDEM, Prasad S. , KIM, Namsoo , MARCU, Cristian , SAVLA, Anup
IPC: H03F1/32
CPC classification number: H03F3/45188 , H03F1/3205 , H03F1/3211 , H03F2203/45318 , H03F2203/45396
Abstract: A differential low noise amplifier (LNA) involves two main amplifying transistors biased in saturation, and two cancel transistors biased in sub-threshold. In one example, the gates of the cancel transistors are coupled to the drains of main transistors, in a symmetrical and cross-coupled fashion. The main transistors are source degenerated. Because the gates of cancel transistors are not coupled to the differential input leads of the LNA, the input capacitance of the LNA is reduced. Noise introduced into the LNA output due to the cancel transistors being biased in the sub-threshold region is reduced because there are two stages. The first stage involves the main transistors, and the second stage involves the cancel transistors. By increasing the gain of the first stage and decreasing the gain of the second stage, overall LNA gain is maintained while reducing the noise that the sub-threshold biased transistors contribute to the LNA output.
Abstract translation: 差分低噪声放大器（LNA）涉及两个偏置饱和的主放大晶体管，两个取消晶体管偏置为次阈值。 在一个示例中，取消晶体管的栅极以对称和交叉耦合的方式耦合到主晶体管的漏极。 主晶体管是源极退化的。 因为取消晶体管的栅极没有耦合到LNA的差分输入引线，所以LNA的输入电容减小。 由于存在两个阶段，由于在子阈值区域偏置的取消晶体管而导入到LNA输出中的噪声被减小。 第一级涉及主晶体管，第二级涉及取消晶体管。 通过增加第一级的增益并降低第二级的增益，保持整体LNA增益，同时降低子阈值偏置晶体管对LNA输出有贡献的噪声。
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Patent Agency Ranking
公开(公告)号：WO2014107163A1
公开(公告)日：2014-07-10
申请号：PCT/US2013/020371
申请日：2013-01-04
Applicant: QUALCOMM INCORPORATED
Inventor： CHANG, Richard , O'SULLIVAN, Tomas , MARCU, Cristian , Brian Kaczynski
Abstract: A frequency synthesizer for a WLAN transceiver is disclosed that may be used to generate 5.4GHz and 2.4GHz signals. The frequency synthesizer may be configured to minimize VCO pulling by using VCO operating frequencies that are not integer multiples of the RF bands. Further, the frequency synthesizer may be configured to minimize interference with other frequency bands used by existing wireless systems.
Abstract translation: 公开了一种用于WLAN收发器的频率合成器，其可用于产生5.4GHz和2.4GHz信号。 频率合成器可以被配置为通过使用不是RF频带的整数倍的VCO工作频率来最小化VCO拉动。 此外，频率合成器可以被配置为最小化对现有无线系统使用的其它频带的干扰。
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公开(公告)号：WO2012047692A1
公开(公告)日：2012-04-12
申请号：PCT/US2011/053615
申请日：2011-09-28
Applicant: QUALCOMM INCORPORATED , MARCU, Cristian , SAVOJ, Jafar
Inventor： MARCU, Cristian , SAVOJ, Jafar
CPC classification number: H03D3/00 , G06K7/0008 , G06K7/10237 , G06K19/0723 , Y10T29/49016 , Y10T29/49117
Abstract: A differential input envelope detector receives an unamplified Near Field Communication (NFC) input signal from an NFC antenna and downconverts an NFC intelligence signal to baseband. In one example, the NFC input signal includes the NFC intelligence signal modulated onto a carrier. The differential input envelope detector downconverts and outputs the downconverted NFC intelligence signal onto an output node in such a way that the fundamental and odd harmonics of the carrier are canceled on the output node. There is substantially no signal of the frequency of the carrier present on the output node and this facilitates filtering of the downconverted NFC intelligence signal from interference and data recovery. An NFC data recovery circuit receives the downconverted NFC intelligence signal from the envelope detector output node. The NFC data recovery circuit can be a low power digital circuit involving an ultra-low power ADC and subsequent low power digital processing circuitry.
Abstract translation: 差分输入包络检测器从NFC天线接收未放大的近场通信（NFC）输入信号，并将NFC智能信号下变频到基带。 在一个示例中，NFC输入信号包括调制到载波上的NFC智能信号。 差分输入包络检测器将下变频的NFC智能信号下变频并输出到输出节点上，使得在输出节点上消除载波的基波和奇次谐波。 输出节点上基本上没有存在载波频率的信号，这有助于滤波下变频NFC智能信号的干扰和数据恢复。 NFC数据恢复电路从包络检测器输出节点接收经下变频的NFC智能信号。 NFC数据恢复电路可以是涉及超低功率ADC和随后的低功率数字处理电路的低功率数字电路。
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公开(公告)号：EP2771838A2
公开(公告)日：2014-09-03
申请号：EP12784841.4
申请日：2012-10-26
Applicant: Qualcomm Incorporated
Inventor： MARCU, Cristian , SAVOJ, Jafar
CPC classification number: G06K7/0008 , G06K19/0723
Abstract: Exemplary embodiments are directed to adaptive signal scaling in NFC transceivers. A transceiver may include a programmable load modulation element configured for load modulation in a tag mode. Further, the transceiver may include a sensing element for measuring an amount of power harvested by the transceiver in the tag mode. The transceiver may also include a controller configured for adjusting a depth of load modulation of the programmable load modulation element depending on the amount of power harvested.
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公开(公告)号：EP2771838B1
公开(公告)日：2017-03-08
申请号：EP12784841.4
申请日：2012-10-26
Applicant: Qualcomm Incorporated
Inventor： MARCU, Cristian , SAVOJ, Jafar
CPC classification number: G06K7/0008 , G06K19/0723
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公开(公告)号：EP2238685A1
公开(公告)日：2010-10-13
申请号：EP08863305.2
申请日：2008-12-16
Applicant: QUALCOMM Incorporated
Inventor： CABANILLAS, Jose , GUDEM, Prasad S. , KIM, Namsoo , MARCU, Cristian , SAVLA, Anup
IPC: H03F1/32
CPC classification number: H03F3/45188 , H03F1/3205 , H03F1/3211 , H03F2203/45318 , H03F2203/45396
Abstract: A differential low noise amplifier (LNA) involves two main amplifying transistors biased in saturation, and two cancel transistors biased in sub-threshold. In one example, the gates of the cancel transistors are coupled to the drains of main transistors, in a symmetrical and cross-coupled fashion. The main transistors are source degenerated. Because the gates of cancel transistors are not coupled to the differential input leads of the LNA, the input capacitance of the LNA is reduced. Noise introduced into the LNA output due to the cancel transistors being biased in the sub-threshold region is reduced because there are two stages. The first stage involves the main transistors, and the second stage involves the cancel transistors. By increasing the gain of the first stage and decreasing the gain of the second stage, overall LNA gain is maintained while reducing the noise that the sub-threshold biased transistors contribute to the LNA output.
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