公开(公告)号：US20140086301A1

公开(公告)日：2014-03-27

申请号：US13800065

申请日：2013-03-13

Applicant: QUALCOMM INCORPORATED

Inventor： Koorosh Akhavan ,  Rainer Gaethke ,  Faramarz Sabouri

IPC: H04L1/00 ,  H04B5/00

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

Abstract: Systems and methods are disclosed that can 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: 公开了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启动器的范围内发生时的相互作用的过冲/下冲要求的信号的系统和方法） 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：US10547289B2

公开(公告)日：2020-01-28

申请号：US15963056

申请日：2018-04-25

Applicant: QUALCOMM Incorporated

Inventor： Joung Won Park ,  Li-chung Chang ,  Faramarz Sabouri

IPC: H03H11/04 ,  H03F3/19 ,  H03F3/21 ,  H04B1/16

Abstract: An N-path filter with one or more branches selectively coupled to a shared circuit node includes a first branch having a first feedback path and a second feedback path. The first feedback path includes a Miller amplifier having an input coupled to an input voltage and a first capacitor coupled to both the input voltage and an output of the Miller amplifier. The second feedback path includes a node in common with the first feedback path. The second feedback path also includes a first high pass filter coupled to the output of the Miller amplifier and a second capacitor coupled to both the first capacitor and the first high pass filter.

公开(公告)号：US09871540B2

公开(公告)日：2018-01-16

申请号：US13653072

申请日：2012-10-16

Applicant: QUALCOMM Incorporated

Inventor： Amin Jahanian ,  Faramarz Sabouri

IPC: G01R21/06 ,  G01R21/133 ,  H04B1/04 ,  H04B17/10 ,  H04B17/13 ,  H03F1/56 ,  H03F3/24 ,  H04W52/52

CPC classification number: H04B1/0458 ,  H03F1/56 ,  H03F3/24 ,  H04B17/104 ,  H04B17/13 ,  H04B2001/0416 ,  H04W52/52

Abstract: Techniques for calculating a real power delivered to a transmit load of a transceiver. In an aspect, two distinct voltages are sampled from a matching network coupling the transmit load to an amplifier output. The voltages are coupled by configurable coupling elements to the down-conversion mixers of the transceiver, and are subsequently converted to digital form for processing by a baseband processor. The baseband processor may calculate a coefficient relating the calculated real power to an actual power delivered to the load. The coefficient may be stored and subsequently applied to a transmit element during normal signal transmission by the transceiver. Note the coupling elements may be configured to decouple the sampled voltages from the down-conversion mixers during normal signal reception by the transceiver, thus avoiding unnecessary loading on the receive signal path.

公开(公告)号：US09847772B2

公开(公告)日：2017-12-19

申请号：US15014305

申请日：2016-02-03

Applicant: QUALCOMM Incorporated

Inventor： Milad Darvishi ,  Hajir Hedayati ,  Faramarz Sabouri

IPC: H03K5/00 ,  H03H19/00

CPC classification number: H03H19/002

Abstract: Certain aspects of the present disclosure provide N-path filters with wider passbands and steeper rejection than conventional N-path filters with only a single pole in each filter path. These N-path filters also have a flatter passband with decreased passband droop. One example N-path filter generally includes a plurality of branches selectively connected with a common node, each branch of the N-path filter comprising a switch connected in series with an impedance comprising a common drain amplifier circuit. In certain aspects, the amplifier circuit may include a degeneration circuit for stability and/or a poly-phase feedback circuit to reduce in-band peaking.

公开(公告)号：US09379753B2

公开(公告)日：2016-06-28

申请号：US14507623

申请日：2014-10-06

Applicant: QUALCOMM Incorporated

Inventor： Janakiram Ganesh Sankaranarayanan ,  Ojas Mahendra Choksi ,  Hasnain Mohammedi Lakdawala ,  Wei Zhuo ,  Faramarz Sabouri

IPC: H04B1/10 ,  H04B1/12 ,  H04B17/21 ,  H04W88/02

CPC classification number: H04B1/123 ,  H04B1/109 ,  H04B1/16 ,  H04B17/21 ,  H04W88/02

Abstract: An apparatus including: at least one receiver having injection points and having at least an amplifier and a transformer; and a plurality of isolation switches coupled to injection points of the at least one receiver, the plurality of isolation switches configured to route a calibration signal generated by a transmitter to one of the injection points.

Abstract translation: 一种装置，包括：至少一个具有注入点并具有至少一个放大器和变压器的接收器; 以及耦合到所述至少一个接收器的注入点的多个隔离开关，所述多个隔离开关被配置为将由发射器产生的校准信号路由到所述注入点之一。

公开(公告)号：US09094113B2

公开(公告)日：2015-07-28

申请号：US13841155

申请日：2013-03-15

Applicant: QUALCOMM Incorporated

Inventor： Eugene Yang ,  Eunmo Kang ,  Faramarz Sabouri

IPC: H04B5/00 ,  H04B15/00 ,  H03D3/00 ,  H03D7/16 ,  H04L27/20 ,  H04L27/00 ,  H04L25/49 ,  H04L7/033

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：US20150049793A1

公开(公告)日：2015-02-19

申请号：US13969413

申请日：2013-08-16

Applicant: QUALCOMM Incorporated

Inventor： Faramarz Sabouri ,  Sunil Kumar Kandukuri Narayan ,  Vinod V. Panikkath ,  Seyed Aidin Bassam

IPC: H04L27/20

CPC classification number: H04L27/2003 ,  H04B1/0003 ,  H04B1/406

Abstract: Exemplary embodiments are related to interfacing a digital module and a radio-frequency (RF) module of a wireless communication device. A device may include a digital module configured to output at least one constant-envelope phase modulated signal. The device may further include an RF module configured to receive the at least one constant-envelope phase modulated signal and generate one or more digital bits in response to receipt of the at least one constant-envelope phase modulated signal.

Abstract translation: 示例性实施例涉及无线通信设备的数字模块和射频（RF）模块的接口。 设备可以包括被配置为输出至少一个恒定包络相位调制信号的数字模块。 该装置还可以包括RF模块，其被配置为接收该至少一个恒定包络相位调制信号，并且响应于接收到该至少一个恒定包络相位调制信号而产生一个或多个数字比特。

公开(公告)号：US20140106669A1

公开(公告)日：2014-04-17

申请号：US13650031

申请日：2012-10-11

Applicant: QUALCOMM INCORPORATED

Inventor： Koushik KRISHNAN ,  Rainer Gaethke ,  Faramarz Sabouri

IPC: H04B5/00

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：US20140103906A1

公开(公告)日：2014-04-17

申请号：US13653072

申请日：2012-10-16

Applicant: QUALCOMM INCORPORATED

Inventor： Amin Jahanian ,  Faramarz Sabouri

IPC: G01R21/06 ,  G01R21/133

CPC classification number: H04B1/0458 ,  H03F1/56 ,  H03F3/24 ,  H04B17/104 ,  H04B17/13 ,  H04B2001/0416 ,  H04W52/52

Abstract: Techniques for calculating a real power delivered to a transmit load of a transceiver. In an aspect, two distinct voltages are sampled from a matching network coupling the transmit load to an amplifier output. The voltages are coupled by configurable coupling elements to the down-conversion mixers of the transceiver, and are subsequently converted to digital form for processing by a baseband processor. The baseband processor may calculate a coefficient relating the calculated real power to an actual power delivered to the load. The coefficient may be stored and subsequently applied to a transmit element during normal signal transmission by the transceiver. Note the coupling elements may be configured to decouple the sampled voltages from the down-conversion mixers during normal signal reception by the transceiver, thus avoiding unnecessary loading on the receive signal path.

Abstract translation: 用于计算传送到收发器的发射负载的实际功率的技术。 在一个方面，从耦合发射负载到放大器输出的匹配网络对两个不同的电压进行采样。 电压通过可配置的耦合元件耦合到收发器的下变频混频器，并随后被转换为数字形式以供基带处理器处理。 基带处理器可以计算与所计算的实际功率相关联的实际功率与递送到负载的实际功率的系数。 可以在由收发机进行的正常信号传输期间将系数存储并随后应用于发送元件。 注意，耦合元件可以被配置为在收发器的正常信号接收期间将采样的电压与下变频混频器去耦，从而避免在接收信号路径上的不必要的负载。