公开(公告)号：US08995505B2

公开(公告)日：2015-03-31

申请号：US13691238

申请日：2012-11-30

Applicant: QUALCOMM Incorporated

Inventor： Faramarz Sabouri ,  Alberto Cicalini

IPC: H04B1/38 ,  H04B1/40

CPC classification number: H04B1/40 ,  H04B1/403

Abstract: Techniques for providing a transceiver with a sliding intermediate frequency (IF). In an aspect, a PLL generates a single local oscillator (LO) signal used for both up-conversion by a transmit (TX) signal path and down-conversion by a receive (RX) signal path, wherein the LO frequency is chosen as the TX carrier frequency. As the TX and RX carrier frequencies may generally differ by a variable amount, the RX signal path utilizing the (TX) LO frequency for down-conversion may be characterized as having a “sliding” IF. To accommodate the sliding IF receiver architecture, specific processing functions such as charge sampling, discrete-time analog band-pass filtering, and sub-sampling analog-to-digital conversion (ADC) are described.

Abstract translation: 提供具有滑动中频（IF）的收发器的技术。 在一方面，PLL产生用于由发送（TX）信号路径进行上转换的单个本地振荡器（LO）信号，并且由接收（RX）信号路径进行下变频，其中LO频率被选择为 TX载波频率。 由于TX和RX载波频率通常可以相差可变量，所以利用（TX）LO频率进行下变频的RX信号路径可被表征为具有“滑动”IF。 为了适应滑动IF接收器架构，描述了诸如电荷采样，离散时间模拟带通滤波和子采样模数转换（ADC）的特定处理功能。

公开(公告)号：US08902965B2

公开(公告)日：2014-12-02

申请号：US13800065

申请日：2013-03-13

Applicant: QUALCOMM Incorporated

Inventor： Koorosh Akhavan ,  Rainer Gaethke ,  Faramarz Sabouri

IPC: H03K7/08 ,  H04L25/03 ,  H04B5/00 ,  H03F3/217 ,  H04L1/00

CPC classification number: H04L1/0033 ,  H03F3/217 ,  H04B5/00 ,  H04B5/0031 ,  H04L25/03828 ,  H04L25/03853

Abstract: The present systems and methods may shape signals to meet emission mask requirements, current consumption requirements, and overshoot/undershoot requirements relating to the interaction that, for example, occurs when a near field communications (NFC) target comes within range of an NFC initiator, and the initiator generates and transmits an NFC waveform. In some implementations, a pair of bit patterns are defined whose differential output from an amplifier is a shaped pulse width modulated waveform. Varying individual bits of the bit patterns can vary the shaped pulse waveform with predictability. The pulse width modulated waveform may be filtered using a matching network that reduces higher order harmonics, thereby reducing out-of-band emissions.

Abstract translation: 本系统和方法可以形成信号以满足发射掩模要求，电流消耗要求以及与例如当近场通信（NFC）目标在NFC发起者的范围内发生时的相互作用相关的过冲/下冲要求， 并且发起者生成并发送NFC波形。 在一些实现中，定义了一对位模式，其中来自放大器的差分输出是成形的脉冲宽度调制波形。 位模式的各个位的变化可以改变具有可预测性的形状脉冲波形。 可以使用减少更高阶谐波的匹配网络对脉宽调制波形进行滤波，从而减少带外发射。

公开(公告)号：US20140273828A1

公开(公告)日：2014-09-18

申请号：US13841155

申请日：2013-03-15

Applicant: QUALCOMM INCORPORATED

Inventor： Eugene Yang ,  Eunmo Kang ,  Faramarz Sabouri

IPC: H04B15/00 ,  H04B5/00

CPC classification number: H04B15/00 ,  H03D3/009 ,  H03D7/165 ,  H04B5/00 ,  H04L7/033 ,  H04L25/4902 ,  H04L27/206 ,  H04L27/2092 ,  H04L2027/0018 ,  H04L2027/0057 ,  H04L2027/0067

Abstract: A method for communication between near field communication (NFC) devices includes generating a transmission signal, an in-phase local oscillator signal, and a quadrature local oscillator signal from edges of an input clock signal. The method further includes mixing a load modulated signal with the in-phase local oscillator signal to generate an in-phase baseband signal. The method further includes mixing the load modulated signal with the quadrature local oscillator signal to generate a quadrature baseband signal. The method further includes adjusting a phase delay of at least one of the in-phase local oscillator signal or the quadrature local oscillator signal in response to a first signal strength of the in-phase baseband signal and a second signal strength of the quadrature baseband signal.

Abstract translation: 用于近场通信（NFC）设备之间的通信的方法包括从输入时钟信号的边缘产生发送信号，同相本地振荡器信号和正交本地振荡器信号。 该方法还包括将负载调制信号与同相本地振荡器信号混合以产生同相基带信号。 该方法还包括将负载调制信号与正交本地振荡器信号混合以产生正交基带信号。 该方法还包括响应于同相基带信号的第一信号强度和正交基带信号的第二信号强度来调整同相本地振荡器信号或正交本地振荡器信号中的至少一个的相位延迟 。

公开(公告)号：US10128819B2

公开(公告)日：2018-11-13

申请号：US15003417

申请日：2016-01-21

Applicant: QUALCOMM Incorporated

Inventor： Hajir Hedayati ,  Milad Darvishi ,  Jeremy Darren Dunworth ,  Faramarz Sabouri

IPC: H03H11/08 ,  H03H11/42 ,  H03H19/00 ,  H03H11/40 ,  H03H11/50

Abstract: Certain aspects of the present disclosure provide an N-path filter implemented using a generalized impedance converter (GIC) circuit. The GIC circuit is configured such that the N-path filter has a desired frequency response, which may include a wide passband with steeper rejection than a conventional N-path filter with only a single pole in each filter path. Certain aspects of the present disclosure provide an N-path filter having a frequency response with multiple concurrent passbands. In certain aspects, the N-path filter with multiple passbands is implemented using the GIC circuit. In other aspects, the N-path filter may include a bandpass response circuit where an inductance of the bandpass response circuit may be implemented using gyrators.

公开(公告)号：US09608574B2

公开(公告)日：2017-03-28

申请号：US13773449

申请日：2013-02-21

Applicant: QUALCOMM Incorporated

Inventor： Ojas M Choksi ,  Himanshu Khatri ,  Faramarz Sabouri ,  Wei Zhuo

IPC: H03F1/26 ,  H04B1/18 ,  H01F29/00

CPC classification number: H03F1/26 ,  H01F29/00 ,  H04B1/18 ,  Y10T307/74

Abstract: Techniques for improving performance of a transformer shared amongst a plurality of operating modes. In an aspect, first and second primary windings of a transformer are coupled to an AC ground voltage. Primary windings are mutually coupled to a secondary winding of the transformer. To render the second primary winding inactive, e.g., when operating in a first mode, a switch coupling the second primary winding to the common reference voltage is opened. Similarly, when it is desired to render the first primary winding inactive, e.g., when operating in a second mode, a switch coupling the first primary winding to the common reference voltage is opened. In this manner, the inactive primary winding advantageously does not load the secondary winding. Further aspects provide for, e.g., extending the techniques to more than two modes, and alternative techniques to mutually couple the signal from the primary to the secondary winding.

公开(公告)号：US20150280946A1

公开(公告)日：2015-10-01

申请号：US14664550

申请日：2015-03-20

Applicant: QUALCOMM Incorporated

Inventor： Faramarz Sabouri ,  Seyed Aiden Bassam ,  Desong Zhao ,  Carl Thomas Hardin ,  Sahar Nozari

IPC: H04L25/06

CPC classification number: H04L25/063 ,  H04B1/28 ,  H04B1/30

Abstract: An apparatus includes an input configured to receive a radio-frequency (RF) signal at a feedback receive path and also includes circuitry coupled to the input. The circuitry is configured to generate a low-intermediate frequency (low-IF) signal based on the RF signal.

Abstract translation: 一种装置包括被配置为在反馈接收路径处接收射频（RF）信号并且还包括耦合到输入的电路的输入。 电路被配置为基于RF信号产生低中频（低IF）信号。

公开(公告)号：US09124302B2

公开(公告)日：2015-09-01

申请号：US13650031

申请日：2012-10-11

Applicant: Qualcomm Incorporated

Inventor： Koushik Krishnan ,  Rainer Gaethke ,  Faramarz Sabouri

IPC: H04B5/00 ,  H04B17/11

CPC classification number: H04B5/00 ,  H04B5/0056 ,  H04B17/11

Abstract: A near-field communications (NFC) device includes an NFC antenna, a matching network coupled to the NFC antenna, and a transmitter coupled to the matching network. The transmitter applies a signal to the matching network and varies a frequency of the signal. A parameter is measured while varying the frequency of the signal. A peak value of the parameter is identified and compared to a threshold. A communication protocol is initiated in response to a determination that the peak value satisfies the threshold.

Abstract translation: 近场通信（NFC）设备包括NFC天线，耦合到NFC天线的匹配网络和耦合到匹配网络的发射机。 发射机向匹配网络施加信号并改变信号的频率。 在改变信号的频率的同时测量参数。 识别参数的峰值并将其与阈值进行比较。 响应于峰值满足阈值的确定来启动通信协议。

公开(公告)号：US08989660B2

公开(公告)日：2015-03-24

申请号：US13733725

申请日：2013-01-03

Applicant: QUALCOMM Incorporated

Inventor： Faramarz Sabouri ,  Haritha Eachempatti ,  Paul DenBoer

IPC: H04B5/00 ,  H04W52/02

CPC classification number: H04B5/00 ,  H04W52/0245 ,  Y02D70/00 ,  Y02D70/144 ,  Y02D70/166 ,  Y02D70/42

Abstract: Hardware interrupt functionality associated with a disable pin may be used to place a near-field communication (NFC) device into various operational modes. For example, various intermediate voltage windows may be defined within an I/O voltage domain and a resistive divider running off an I/O rail may generate multiple reference voltages within the I/O voltage domain. In one embodiment, different comparators may compare voltage on the disable pin to the reference voltages generated with the resistive divider to determine whether the voltage on the disable pin falls within one of the intermediate voltage windows. As such, if a particular comparator determines that the voltage on the disable pin falls within one of the intermediate voltage windows, a control signal may be generated to transition the NFC device into a corresponding operational mode.

Abstract translation: 与禁用引脚相关联的硬件中断功能可用于将近场通信（NFC）设备放置到各种操作模式中。 例如，可以在I / O电压域内定义各种中间电压窗口，并且从I / O轨道运行的电阻分压器可以在I / O电压域内产生多个参考电压。 在一个实施例中，不同的比较器可以将禁用引脚上的电压与电阻分压器产生的参考电压进行比较，以确定禁用引脚上的电压是否落在中间电压窗口之一内。 因此，如果特定比较器确定禁用引脚上的电压落在中间电压窗口之一内，则可以产生控制信号以将NFC设备转换到相应的操作模式。

公开(公告)号：US20140187154A1

公开(公告)日：2014-07-03

申请号：US13733725

申请日：2013-01-03

Applicant: QUALCOMM INCORPORATED

Inventor： Faramarz Sabouri ,  Haritha Eachempatti ,  Paul DenBoer

IPC: H04B5/00

CPC classification number: H04B5/00 ,  H04W52/0245 ,  Y02D70/00 ,  Y02D70/144 ,  Y02D70/166 ,  Y02D70/42

Abstract: Hardware interrupt functionality associated with a disable pin may be used to place a near-field communication (NFC) device into various operational modes. For example, various intermediate voltage windows may be defined within an I/O voltage domain and a resistive divider running off an I/O rail may generate multiple reference voltages within the I/O voltage domain. In one embodiment, different comparators may compare voltage on the disable pin to the reference voltages generated with the resistive divider to determine whether the voltage on the disable pin falls within one of the intermediate voltage windows. As such, if a particular comparator determines that the voltage on the disable pin falls within one of the intermediate voltage windows, a control signal may be generated to transition the NFC device into a corresponding operational mode.

Abstract translation: 与禁用引脚相关联的硬件中断功能可用于将近场通信（NFC）设备放置到各种操作模式中。 例如，可以在I / O电压域内定义各种中间电压窗口，并且从I / O轨道运行的电阻分压器可以在I / O电压域内产生多个参考电压。 在一个实施例中，不同的比较器可以将禁用引脚上的电压与电阻分压器产生的参考电压进行比较，以确定禁用引脚上的电压是否落在中间电压窗口之一内。 因此，如果特定比较器确定禁用引脚上的电压落在中间电压窗口之一内，则可以产生控制信号以将NFC设备转换到相应的操作模式。

公开(公告)号：US20140139042A1

公开(公告)日：2014-05-22

申请号：US13773449

申请日：2013-02-21

Applicant: QUALCOMM INCORPORATED

Inventor： Ojas M. Choksi ,  Himanshu Khatri ,  Faramarz Sabouri ,  Wei Zhuo

IPC: H01F27/38 ,  H03F1/26

CPC classification number: H03F1/26 ,  H01F29/00 ,  H04B1/18 ,  Y10T307/74

Abstract: Techniques for improving performance of a transformer shared amongst a plurality of operating modes. In an aspect, first and second primary windings of a transformer are coupled to an AC ground voltage. Primary windings are mutually coupled to a secondary winding of the transformer. To render the second primary winding inactive, e.g., when operating in a first mode, a switch coupling the second primary winding to the common reference voltage is opened. Similarly, when it is desired to render the first primary winding inactive, e.g., when operating in a second mode, a switch coupling the first primary winding to the common reference voltage is opened. In this manner, the inactive primary winding advantageously does not load the secondary winding. Further aspects provide for, e.g., extending the techniques to more than two modes, and alternative techniques to mutually couple the signal from the primary to the secondary winding.

Abstract translation: 用于改善在多个操作模式之间共享的变压器的性能的技术。 在一个方面，变压器的第一和第二初级绕组耦合到AC接地电压。 初级绕组相互耦合到变压器的次级绕组。 为了使第二初级绕组无效，例如当以第一模式操作时，将第二初级绕组耦合到公共参考电压的开关被打开。 类似地，当期望使第一初级绕组无效时，例如当在第二模式下操作时，将第一初级绕组耦合到公共参考电压的开关被打开。 以这种方式，无源初级绕组有利地不加载次级绕组。 另外的方面提供了例如将技术扩展到多于两种模式，以及将信号从初级绕组互相耦合到次级绕组的替代技术。