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    Reconfigurable amplifier
    1.
    发明授权
    Reconfigurable amplifier 有权

    公开(公告)号：US11683062B2

    公开(公告)日：2023-06-20

    申请号：US17404948

    申请日：2021-08-17

    Applicant: QUALCOMM Incorporated

    Inventor： Janakiram Sankaranarayanan ,  Jun Tan ,  Lai Kan Leung ,  Timothy Donald Gathman ,  Mehmet Ipek ,  Ojas Choksi

    IPC: H04B1/18 ,  H03F3/19

    CPC classification number: H04B1/18 ,  H03F3/19 ,  H03F2200/294 ,  H03F2200/451

    Abstract: A reconfigurable amplifier includes a first transistor having a gate coupled to an input of the reconfigurable amplifier, and a source coupled to a ground. The reconfigurable amplifier also includes a gate control circuit, and a second transistor having a gate coupled to the gate control circuit, a source coupled to a drain of the first transistor, and a drain coupled to an output of the reconfigurable amplifier, wherein the gate control circuit is configured to output a bias voltage to the gate of the second transistor in a cascode mode, and output a switch voltage to the gate of the second transistor in a non-cascode mode. The reconfigurable amplifier further includes a load coupled to the output of the reconfigurable amplifier.

    Reconfigurable baseband filter
    2.
    发明授权
    Reconfigurable baseband filter 有权

    公开(公告)号：US11569865B1

    公开(公告)日：2023-01-31

    申请号：US17448872

    申请日：2021-09-24

    Applicant: QUALCOMM Incorporated

    Inventor： Chih-Fan Liao ,  Aleksandar Miodrag Tasic ,  Kyle David Holland ,  Jang Joon Lee ,  Jian Kang ,  Lai Kan Leung ,  Chiewcharn Narathong

    IPC: H04B1/525

    Abstract: Wireless signal processing may be improved by using a configurable baseband filter (BBF) in the receive path of a transceiver. A configurable BBF may accommodate processing of different wireless signals in a single integrated circuit (IC) chip. For example, a single IC may support processing of 5G mmWave RF signals and 5G sub-7 GHz RF signals by reconfiguring the BBF with settings appropriate for the different wireless signals. The reconfiguring of the BBF may include adjusting a bandwidth of the BBF and/or adjusting a filter order of the BBF. The reconfiguring of the BBF may be performed in response to detection of jammer signals to improve rejection of the jammer signals.

    Complementary current-mode biquad with high linearity
    3.
    发明授权
    Complementary current-mode biquad with high linearity 有权

    公开(公告)号：US11296678B1

    公开(公告)日：2022-04-05

    申请号：US17136723

    申请日：2020-12-29

    Applicant: QUALCOMM Incorporated

    Inventor： Timothy Donald Gathman ,  Lai Kan Leung

    IPC: H03H11/00 ,  H03H11/04

    Abstract: Certain aspects of the present disclosure provide methods and apparatus for processing signals using a current-mode biquad filter, which may have a tunable bias current and/or tunable capacitance. One example apparatus is a current-mode biquad filter circuit that includes a first input current node, a first capacitive element coupled to the first input current node, a first output current node, a first active filter circuit coupled between the first input current node and the first output current node, and a second active filter circuit coupled between the first input current node and the first output current node. The second active filter circuit is complementary to the first active filter circuit.

    RF output driver
    4.
    发明授权
    RF output driver 有权

    公开(公告)号：US10659010B1

    公开(公告)日：2020-05-19

    申请号：US16254877

    申请日：2019-01-23

    Applicant: QUALCOMM INCORPORATED

    Inventor： Chirag Dipak Patel ,  Lai Kan Leung ,  Ravi Sridhara

    IPC: H03K5/00 ,  H03K17/16 ,  H03K19/00 ,  H03H11/28 ,  H03K17/687 ,  H04B1/16

    Abstract: An RF driver circuit may include a wideband output impedance matching and gain circuit, a wideband input impedance matching and gain circuit, and a summer configured to sum the outputs of the wideband output impedance matching and gain circuit and wideband input impedance matching and gain circuit. The wideband output impedance matching and gain circuit and wideband input impedance matching and gain circuit may collectively provide the gain of the RF driver circuit. The wideband output impedance matching circuit may have a source follower configuration. The wideband input impedance matching circuit may have a common gate configuration. Controllable bias voltages may be used to maintain a constant gain and interface impedances in multiple modes of operation.

    ENHANCED BROADBAND OPERATION OF AN ACTIVE MIXER
    5.
    发明申请
    ENHANCED BROADBAND OPERATION OF AN ACTIVE MIXER 审中-公开

    公开(公告)号：US20180159474A1

    公开(公告)日：2018-06-07

    申请号：US15831370

    申请日：2017-12-04

    Applicant: QUALCOMM Incorporated

    Inventor： Xinmin Yu ,  Timothy Donald Gathman ,  Lai Kan Leung

    IPC: H03D7/14

    CPC classification number: H03D7/1491 ,  H03B2200/0062 ,  H03D7/1425 ,  H03D7/1441 ,  H03D7/1458 ,  H03D2200/0043 ,  H04B1/26

    Abstract: Methods, systems, and devices for wireless communication are described for enhanced broadband operation of an active mixer. In an example, an apparatus may include an active mixer that converts between radio frequency (RF) signals and intermediate frequency (IF) signals based at least in part on an alternating current (AC) local oscillator (LO) signal, wherein a direct current (DC) current generated within the active mixer is dependent in part on a bias voltage and the AC LO signal. The apparatus may include a mixer biasing circuit that generates the bias voltage for the active mixer, a magnitude of the bias voltage having an inverse relationship to an amplitude of the AC LO signal.

    Frequency synthesizer architecture in a time-division duplex mode for a wireless device
    9.
    发明授权
    Frequency synthesizer architecture in a time-division duplex mode for a wireless device 有权
    用于无线设备的时分双工模式的频率合成器架构

    公开(公告)号：US09143085B2

    公开(公告)日：2015-09-22

    申请号：US13765992

    申请日：2013-02-13

    Applicant: QUALCOMM Incorporated

    Inventor： Chiewcharn Narathong ,  Lai Kan Leung ,  Soon-Seng Lau ,  Shrenik Patel

    IPC: H03B28/00 ,  H04B1/403 ,  H04B1/408 ,  H04B1/04

    CPC classification number: H03B28/00 ,  H04B1/0475 ,  H04B1/406 ,  H04B1/408

    Abstract: A dual frequency synthesizer architecture for a wireless device operating in a time division duplex (TDD) mode is disclosed. In an exemplary design, the wireless device includes first and second frequency synthesizers. The first frequency synthesizer generates a first oscillator signal used to generate a first/receive local oscillator (LO) signal at an LO frequency for the receiver. The second frequency synthesizer generates a second oscillator signal used to generate a second/transmit LO signal at the same LO frequency for the transmitter. The two frequency synthesizers generate their oscillator signals to obtain receive and transmit LO signals at the same LO frequency when the wireless device operates in the TDD mode.

    Abstract translation: 公开了一种用于以时分双工（TDD）模式工作的无线设备的双频合成器架构。 在示例性设计中，无线设备包括第一和第二频率合成器。 第一频率合成器产生用于产生用于接收机的LO频率的第一/接收本地振荡器（LO）信号的第一振荡器信号。 第二频率合成器产生用于产生用于发射机的相同LO频率的第二/发射LO信号的第二振荡器信号。 当无线设备在TDD模式下工作时，两个频率合成器产生其振荡器信号以获得在相同LO频率下的接收和发送LO信号。

    Phase Detection and Correction for Non-Continuous Local Oscillator Generator
    10.
    发明申请
    Phase Detection and Correction for Non-Continuous Local Oscillator Generator 有权
    非连续本地振荡器发生器的相位检测和校正

    公开(公告)号：US20140270032A1

    公开(公告)日：2014-09-18

    申请号：US13829232

    申请日：2013-03-14

    Applicant: QUALCOMM INCORPORATED

    Inventor： Li Liu ,  Praveen-Kumar Sampath ,  Lai Kan Leung ,  Chiewcharn Narathong ,  Soon-Seng Lau ,  Ketan Humnabadkar ,  Raghu Narayan Challa ,  Devavrata Vasant Godbole

    IPC: H04L7/00 ,  H04L7/033

    CPC classification number: H04L7/0331 ,  H03B21/01 ,  H03D3/009 ,  H04W52/02 ,  H04W52/0209 ,  Y02D70/1222 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164

    Abstract: Techniques for detecting and correcting phase discontinuity of a local oscillator (LO) signal are disclosed. In one design, a wireless device includes an LO generator and a phase detector. The LO generator generates an LO signal used for frequency conversion and is periodically powered on and off. The phase detector detects the phase of the LO signal when the LO generator is powered on. The detected phase of the LO signal is used to identify phase discontinuity of the LO signal. The wireless device may further include (i) a single-tone generator that generates a single-tone signal used to detect the phase of the LO signal, (ii) a downconverter that downconverts the single-tone signal with the LO signal and provides a downconverted signal used by the phase detector to detect the phase of LO signal, and (iii) phase corrector that corrects phase discontinuity of the LO signal in the analog domain or digital domain.

    Abstract translation: 公开了用于检测和校正本地振荡器（LO）信号的相位不连续性的技术。 在一种设计中，无线设备包括LO发生器和相位检测器。 LO发生器产生用于频率转换的LO信号，并且周期性地通电和关断。 当LO发生器通电时，相位检测器检测LO信号的相位。 LO信号的检测相位用于识别LO信号的相位不连续性。 无线设备还可以包括（i）生成用于检测LO信号的相位的单音信号的单音发生器，（ii）下变频器，其使用LO信号对单音信号进行下变频，并提供 相位检测器用于检测LO信号的相位的下变频信号，以及（iii）校正模拟域或数字域中的LO信号的相位不连续性的相位校正器。

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