公开(公告)号：US20150139358A1

公开(公告)日：2015-05-21

申请号：US14083240

申请日：2013-11-18

Applicant: QUALCOMM INCORPORATED

Inventor： Bhushan Shanti ASURI ,  Thomas Domenick MARRA ,  Mohammad FARAZIAN ,  Gurkanwal Singh SAHOTA

IPC: H04B1/04 ,  H04B17/00

CPC classification number: H04B1/0475 ,  H04B17/10 ,  H04B17/13 ,  H04B2001/0425 ,  H04L27/361 ,  H04L27/367

Abstract: Exemplary embodiments are related to digital pre-distortion in envelope tracking systems. A device may include an amplitude modulation-to-phase modulation (AM-PM) distortion unit configured to generate an AM-PM distortion component in response to receipt of phase data of an input transmit signal. The device may also include a local oscillator (LO) path coupled to the distortion unit and configured to convey a local oscillator (LO) signal that varies based on the AM-PM distortion component.

Abstract translation: 示例性实施例涉及包络跟踪系统中的数字预失真。 设备可以包括被配置为响应于接收到输入发射信号的相位数据而产生AM-PM失真分量的幅度调制 - 相位调制（AM-PM）失真单元。 该装置还可以包括耦合到失真单元并被配置为传送基于AM-PM失真分量变化的本地振荡器（LO）信号的本地振荡器（LO）路径。

公开(公告)号：US20170019066A1

公开(公告)日：2017-01-19

申请号：US14801535

申请日：2015-07-16

Applicant: QUALCOMM Incorporated

Inventor： Mohammad FARAZIAN ,  Amirpouya KAVOUSIAN ,  Alireza KHALILI

IPC: H03B5/12

CPC classification number: H03B5/1256 ,  H03B5/08 ,  H03B5/12 ,  H03B5/1206

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for generating multiple oscillating signals. One example circuit generally includes a first voltage-controlled oscillator (VCO) having a first inductor and a second VCO having a second inductor in parallel with a third inductor, wherein the second and third inductors are disposed inside a loop of the first inductor and may behave as a magnetic dipole. The loop of the first inductor may be symmetrical, and a combined geometry of loops of the second and third inductors may be symmetrical. The coupling coefficient (k) between the first inductor and a combination of the second and third inductors may be small (e.g., k

Abstract translation: 本公开的某些方面提供了用于产生多个振荡信号的技术和装置。 一个示例电路通常包括具有第一电感器的第一压控振荡器（VCO）和具有与第三电感器并联的第二电感器的第二VCO，其中第二和第三电感器设置在第一电感器的环路内，并且可以 表现为磁偶极子。 第一电感器的环路可以是对称的，并且第二和第三电感器的环路的组合几何形状可以是对称的。 由于电路布局的对称几何形状，第一电感器和第二和第三电感器的组合之间的耦合系数（k）可能很小（例如，k <0.01）。 利用较小的k，第一和第二VCO的电感器可以彼此更靠近地放置，从而减少两个VCO消耗的面积。

公开(公告)号：US20200177126A1

公开(公告)日：2020-06-04

申请号：US16697801

申请日：2019-11-27

Applicant: QUALCOMM Incorporated

Inventor： Gang LIU ,  Mohammad FARAZIAN ,  Wu-Hsin CHEN ,  Razak HOSSAIN

IPC: H03B5/12

Abstract: Certain aspects provide a circuit for generating an oscillating signal. The circuit generally includes a voltage-controlled oscillator (VCO) having cross-coupled transistors, a first capacitive element and a second capacitive element coupled to the cross-coupled transistors, and a first inductive element and a second inductive element coupled to the cross-coupled transistors. First terminals of the first inductive element and the second inductive element are coupled to first terminals of the first capacitive element and the second capacitive element, respectively. The circuit also includes a control circuit having an output coupled to a supply voltage node at second terminals of the first inductive element and the second inductive element, and a feedback path coupled between the VCO and an input of the control circuit.

公开(公告)号：US20170244361A1

公开(公告)日：2017-08-24

申请号：US15048460

申请日：2016-02-19

Applicant: QUALCOMM Incorporated

Inventor： Mohammad FARAZIAN ,  Masoud MOSLEHI BAJESTAN

IPC: H03B5/12

CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/1265 ,  H03B5/1268 ,  H03B5/1841 ,  H03B5/1852 ,  H03B2200/0016 ,  H03B2201/025

Abstract: Certain aspects of the present disclosure generally relate to a voltage-controlled oscillator (VCO) that is configurable (e.g., in a dynamic manner) in multiple modes of operation (e.g., low/high-band modes). The VCO may include a resonant circuit coupled to a plurality of switches that may be used to adjust current flow within one or more inductive elements of the resonant circuit. By adjusting the current flow within the inductive elements, an inductance of the resonant circuit may be adjusted, which in turn adjusts a band of the VCO.

公开(公告)号：US20160065195A1

公开(公告)日：2016-03-03

申请号：US14471530

申请日：2014-08-28

Applicant: QUALCOMM Incorporated

Inventor： Mohammad FARAZIAN ,  Serkan SAYILIR ,  Marco ZANUSO ,  Yiwu TANG

IPC: H03K5/15 ,  H03H11/22 ,  H03H11/20

CPC classification number: H03K5/1506 ,  H03H11/22 ,  H03H19/002 ,  H03K2005/00286

Abstract: Certain aspects of the present disclosure provide methods and apparatus for generating multiple oscillating signals having different phases. One example multiphase generating circuit generally includes a first phase shifting circuit configured to phase shift an input signal having an input frequency, such that an output signal of the first phase shifting circuit has a first phase difference with respect to the input signal; a first frequency dividing circuit configured to receive the input signal and output a first set of signals having a first frequency less than the input frequency of the input signal; and a second frequency dividing circuit configured to receive the output signal of the first phase shifting circuit and output a second set of signals having a second frequency less than the input frequency of the input signal. The multiphase signals may be used for fast frequency estimation of the input signal or in N-path filters.

Abstract translation: 本公开的某些方面提供了用于产生具有不同相位的多个振荡信号的方法和装置。 一个示例性多相生成电路通常包括：第一移相电路，被配置为使具有输入频率的输入信号相移，使得第一移相电路的输出信号相对于输入信号具有第一相位差; 第一分频电路，被配置为接收所述输入信号并输出​​具有小于所述输入信号的输入频率的第一频率的第一组信号; 以及第二分频电路，被配置为接收第一移相电路的输出信号并输出​​具有小于输入信号的输入频率的第二频率的第二组信号。 多相信号可用于输入信号的快速频率估计或N路径滤波器。