公开(公告)号：US20140106668A1

公开(公告)日：2014-04-17

申请号：US13649801

申请日：2012-10-11

Applicant: QUALCOMM INCORPORATED

Inventor： Koushik KRISHNAN ,  Rainer GAETHKE ,  Faramarz SABOURI

IPC: H04B5/00

CPC classification number: G06K7/0008 ,  G06K7/10128 ,  H04B5/0031 ,  H04B5/0075 ,  H04B17/12

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 a capacitance of the matching network is varied. A parameter is measured while varying the capacitance of the matching network and while applying 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，匹配网络的电容变化。 在改变匹配网络的电容和应用信号的同时测量参数。 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：US20170214391A1

公开(公告)日：2017-07-27

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

CPC classification number: H03H19/002 ,  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：US20240414033A1

公开(公告)日：2024-12-12

申请号：US18333384

申请日：2023-06-12

Applicant: QUALCOMM Incorporated

Inventor： Faramarz SABOURI

IPC: H04L25/06 ,  H04L25/03

Abstract: An apparatus, includes: a data receiver circuit, comprising: a differential device configured to output a digital signal based on a differential data signal received via first and second transmission lines, or a single-ended data signal received via the first transmission line, wherein the differential device includes a first input configured to couple to the first transmission line; and at least one switching device including a first terminal coupled to a second input of the differential device, a second terminal configured to couple to the second transmission line, and a third terminal configured to receive a reference voltage. Another apparatus includes: a data transmitter circuit, comprising: a first buffer configured to generate a first differential data signal or a single-ended data signal based on an input data signal; and a second buffer configured to generate a second differential data signal based on the input data signal or a fixed voltage potential.

公开(公告)号：US20190334504A1

公开(公告)日：2019-10-31

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：US20240412913A1

公开(公告)日：2024-12-12

申请号：US18332247

申请日：2023-06-09

Applicant: QUALCOMM Incorporated

Inventor： Lisette ZHANG ,  Med NARIMAN ,  Chinmaya MISHRA ,  Faramarz SABOURI ,  Gurkanwal Singh SAHOTA

IPC: H01F21/12 ,  H01F17/00 ,  H01F27/04 ,  H01F27/29

Abstract: An inductor structure has a first terminal and a second terminal, and includes a conductor path between the first terminal and the second terminal. The conductor path includes a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, and a sixth inductor. The conductor path may be configured such that, when a current flows from the first terminal to the second terminal, the current flows in a first direction in the first inductor, the third inductor, and the fifth inductor, and the current flows in a second direction in the second inductor, the fourth inductor, and the sixth inductor. The first direction may be clockwise and the second direction may be counterclockwise, or vice versa.

公开(公告)号：US20170222628A1

公开(公告)日：2017-08-03

申请号：US15014305

申请日：2016-02-03

Applicant: QUALCOMM Incorporated

Inventor： Milad DARVISHI ,  Hajir HEDAYATI ,  Faramarz SABOURI

IPC: 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.