公开(公告)号：US20160336921A1

公开(公告)日：2016-11-17

申请号：US14711493

申请日：2015-05-13

Applicant: QUALCOMM Incorporated

Inventor： Sunyoung Kim ,  Cheng-Han Wang

IPC: H03H11/32 ,  H03F3/193

CPC classification number: H03H11/32 ,  H03F3/193 ,  H03F3/265 ,  H03F3/45654 ,  H03F2200/451

Abstract: An active balun uses two inverters to produce a differential output from a single-ended input. A current source supplies current to both inverters and a current sink sinks current from both inverters. The inverters include bias resistors coupled between their inputs and outputs. A coupling capacitor couples the output of the first inverter to the input of the first inverter. Values of the bias resistors and the coupling capacitor may selected to assure stability of the active balun. The values may be programmable, for example, based on a desired operating frequency. The current source may be biased by a common-mode feedback circuit based on the common-mode voltage of the differential output.

Abstract translation: 主动平衡 - 不平衡变压器使用两个逆变器从单端输入产生差分输出。 电流源为两个逆变器提供电流，并且电流吸收器从两个逆变器吸收电流。 逆变器包括耦合在其输入和输出之间的偏置电阻。 耦合电容将第一反相器的输出耦合到第一反相器的输入端。 可以选择偏置电阻器和耦合电容器的值以确保主动平衡 - 不平衡变压器的稳定性。 这些值可以是可编程的，例如，基于期望的操作频率。 基于差分输出的共模电压，可以通过共模反馈电路来偏置电流源。

公开(公告)号：US09341721B2

公开(公告)日：2016-05-17

申请号：US13841698

申请日：2013-03-15

Applicant: QUALCOMM Incorporated

Inventor： Cheng-Han Wang ,  Hong Sun Kim ,  Liang Zhao ,  Jin-Su Ko

IPC: G01S19/33 ,  G01S19/37 ,  H04B1/00

CPC classification number: G01S19/33 ,  G01S19/37 ,  H04B1/0067

Abstract: A global navigation satellite system (GNSS) receiver includes at least one GNSS antenna configured to receive input signaling from at least a first GNSS source and a second GNSS source; an in-phase/quadrature (I/Q) mixer coupled to the at least one GNSS antenna and configured to process the input signaling to obtain complex intermediate signaling; a first complex filter coupled to the I/Q mixer and configured to filter the complex intermediate signaling with respect to a first frequency range to obtain first real output signaling; a second complex filter coupled to the I/Q mixer and configured to filter the complex intermediate signaling with respect to a second frequency range to obtain second real output signaling; and a signal combiner coupled to the first and second complex filters and configured to generate combined real output signaling by combining the first real output signaling and the second real output signaling.

Abstract translation: 全球导航卫星系统（GNSS）接收机包括至少一个GNSS天线，被配置为从至少第一GNSS源和第二GNSS源接收输入信令; 耦合到所述至少一个GNSS天线并被配置为处理所述输入信令以获得复杂的中间信令的同相/正交（I / Q）混合器; 耦合到所述I / Q混频器并且被配置为相对于第一频率范围过滤所述复合中间信令以获得第一实际输出信令的第一复滤波器; 耦合到所述I / Q混频器并被配置为相对于第二频率范围过滤所述复合中间信令以获得第二实际输出信号的第二复滤波器; 以及信号组合器，其耦合到所述第一和第二复数滤波器并且被配置为通过组合所述第一实际输出信令和所述第二实际输出信令来产生组合的实际输出信令。

公开(公告)号：US09088471B1

公开(公告)日：2015-07-21

申请号：US14465442

申请日：2014-08-21

Applicant: QUALCOMM Incorporated

Inventor： Hong Sun Kim ,  James Ian Jaffee ,  Paul Sheehy ,  Jeremy Darren Dunworth ,  Cheng-Han Wang ,  Prasad Srinivasa Siva Gudem ,  Ojas Mahendra Choksi ,  Jungdong Park

IPC: H04L5/12 ,  H04L27/36 ,  H04L27/26 ,  H04L27/00

CPC classification number: H04L27/362 ,  H04L27/206 ,  H04L27/2071 ,  H04L27/364 ,  H04L2027/0016

Abstract: Certain aspects of the present disclosure provide methods and apparatus for performing quadrature combining and adjusting. One example circuit may include first through fourth mixing circuits. The first mixing circuit may multiply a radio frequency signal with a first local oscillating signal to generate a first frequency converted signal. The second mixing circuit may multiply a radio frequency (RF) signal with a second local oscillating signal, which may be about 90° out of phase with the first local oscillating signal, to generate a second frequency converted signal. The third and fourth mixing circuits may multiply the RF signal with the second and first signals, respectively, to generate third and fourth frequency converted signals, respectively. A first combining circuit may combine the first and third frequency converted signals, and a second combining circuit may combine the second and fourth frequency converted signals.

Abstract translation: 本公开的某些方面提供了用于执行正交组合和调整的方法和装置。 一个示例电路可以包括第一至第四混合电路。 第一混合电路可以将射频信号与第一本地振荡信号相乘以产生第一频率转换信号。 第二混合电路可以将射频（RF）信号与第二本地振荡信号相乘，该第二本地振荡信号可以与第一本地振荡信号相差约90°，以产生第二频率转换信号。 第三和第四混频电路可以分别将RF信号与第二和第一信号相乘，以分别产生第三和第四频率转换信号。 第一组合电路可以组合第一和第三频率转换信号，并且第二组合电路可以组合第二和第四频率转换信号。

公开(公告)号：US20150061071A1

公开(公告)日：2015-03-05

申请号：US14014827

申请日：2013-08-30

Applicant: QUALCOMM INCORPORATED

Inventor： Mohammad B. Vahid Far ,  Alireza Khalili ,  Cheng-Han Wang ,  Phoebe Peihong Chen

IPC: H01L29/94

CPC classification number: H01L29/94 ,  H01L27/0805 ,  H01L27/0811 ,  H02M3/00 ,  H02M3/18

Abstract: A MOS capacitor with improved linearity is disclosed. In an exemplary embodiment, an apparatus includes a main branch comprising a first signal path having a first capacitor pair connected in series with reversed polarities and a second signal path having a second capacitor pair connected in series with reversed polarities, the first and second signal paths connected in parallel. The apparatus also includes an auxiliary branch comprising at least one signal path having at least one capacitor pair connected in series with reversed polarities and connected in parallel with the main branch. In an exemplary embodiment, the capacitors are MOS capacitors.

Abstract translation: 公开了具有改善的线性度的MOS电容器。 在示例性实施例中，一种装置包括主分支，该主分支包括具有与反向极性串联连接的第一电容器对的第一信号路径和具有与反向极性串联连接的第二电容器对的第二信号路径，第一和第二信号路径 并联连接 该装置还包括辅助支路，该辅助支路包括至少一个信号路径，该至少一个信号路径具有与反向极性串联连接的至少一个电容器对并与主支路并联连接。 在示例性实施例中，电容器是MOS电容器。

公开(公告)号：US20140256278A1

公开(公告)日：2014-09-11

申请号：US13791048

申请日：2013-03-08

Applicant: QUALCOMM INCORPORATED

Inventor： Jin-Su Ko ,  Hong Sun Kim ,  Liang Zhao ,  Cheng-Han Wang ,  Dominic Gerard Farmer

IPC: H04B1/16

CPC classification number: H04B1/16 ,  H04B1/005 ,  H04B1/0064 ,  H04B1/0075

Abstract: Methods and circuits can down convert at least a first RF signal on a first path in a first frequency band to provide a first IF signal. A second RF signal on second path in a second frequency band can be down converted to provide a second IF signal. The first IF signal and the second IF signal are interspersed in the frequency domain, and the first frequency band is different from the second frequency band. A combiner can combine at least part of the first IF signal and the second IF signal to provide a combined signal on an output signal path for reception by a digital processing circuit. The first IF signal or second IF signal can be a Zero IF (ZIF), very low IF (VLIF), or Low IF (LIF) signal.

Abstract translation: 方法和电路可以在第一频带中的第一路径上的至少第一RF信号下变频以提供第一IF信号。 在第二频带中的第二路径上的第二RF信号可被下变频以提供第二IF信号。 第一IF信号和第二IF信号分散在频域中，并且第一频带不同于第二频带。 组合器可以组合第一IF信号和第二IF信号的至少一部分，以在输出信号路径上提供组合信号以供数字处理电路接收。 第一IF信号或第二IF信号可以是零中频（ZIF），极低IF（VLIF）或低IF（LIF）信号。