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    Reconfigurable wideband current-mode filters
    11.
    发明授权
    Reconfigurable wideband current-mode filters 有权

    公开(公告)号：US10153934B1

    公开(公告)日：2018-12-11

    申请号：US15730040

    申请日：2017-10-11

    Applicant: QUALCOMM Incorporated

    Inventor： Timothy Donald Gathman ,  Chirag Dipak Patel ,  Lai Kan Leung ,  Xinmin Yu ,  Rajagopalan Rangarajan

    IPC: H04B1/16 ,  H04L27/26 ,  H04L27/01 ,  H04B7/08

    Abstract: In certain aspects, a circuit comprises a low noise amplifier (LNA) configured to receive a radio frequency (RF) signal, a first mixer coupled to the low noise amplifier (LNA), and a first trans-impedance filter coupled to the first mixer. The first trans-impedance filter comprises a tunable inductor and capacitor (LC) network configured to be a portion of a doubly terminated LC ladder filter and a trans-impedance amplifier (TIA) coupled to the tunable inductor and capacitor (LC) network. The circuit further comprises a second mixer coupled to the low noise amplifier (LNA) and a second trans-impedance filter coupled to the second mixer.

    Radio frequency phase shifter with variable input capacitance
    14.
    发明授权
    Radio frequency phase shifter with variable input capacitance 有权

    公开(公告)号：US12068724B2

    公开(公告)日：2024-08-20

    申请号：US17403595

    申请日：2021-08-16

    Applicant: QUALCOMM Incorporated

    Inventor： Gary Lee Brown, Jr. ,  Chirag Dipak Patel

    IPC: H03F3/14 ,  H03F1/22 ,  H03F3/195 ,  H03H7/20 ,  H03H7/38

    CPC classification number: H03F3/195 ,  H03F1/223 ,  H03H7/20 ,  H03H7/38 ,  H03F2200/204

    Abstract: Aspects of the disclosure relate to a radio frequency phase shifter. An example includes an amplification stage to produce an amplified voltage, the amplification stage having a first amplifier with a first input coupled to a first output of a hybrid coupler and a second amplifier with a complementary second input coupled to a complementary second output of the hybrid coupler. A vector modulation stage coupled to the amplification stage receives the amplified voltage and produces a modulated vector, the vector modulation stage has an in-phase section and a quadrature section to control the phase of the modulated vector in response to a phase control signal. A varactor coupled across the first input and the second input of the amplification stage adjusts the capacitance between the first input and the second input in response to a capacitance control signal.

    Phase Shifter with Compensation Circuit
    15.
    发明申请
    Phase Shifter with Compensation Circuit 有权

    公开(公告)号：US20220060200A1

    公开(公告)日：2022-02-24

    申请号：US17001568

    申请日：2020-08-24

    Applicant: Qualcomm Incorporated

    Inventor： Laya Mohammadi ,  Chirag Dipak Patel ,  Bhushan Shanti Asuri

    IPC: H04B1/00 ,  H03F3/19 ,  H04B1/04 ,  H04B1/525 ,  H03F1/32

    Abstract: An apparatus is disclosed for phase-shifting signals with a compensation circuit. In example implementations, an apparatus for phase-shifting signals includes a phase shifter having a first port and a second port. The phase shifter also includes a signal phase generator, a compensation circuit, and a vector modulator. The compensation circuit includes a first capacitor with a first capacitance and a second capacitor with a second capacitance. The first capacitance is different from the second capacitance. The signal phase generator is coupled between the first port and the compensation circuit. The vector modulator is coupled between the compensation circuit and the second port.

    Phase Shifter with Active Signal Phase Generation
    16.
    发明申请
    Phase Shifter with Active Signal Phase Generation 有权

    公开(公告)号：US20210175589A1

    公开(公告)日：2021-06-10

    申请号：US16785440

    申请日：2020-02-07

    Applicant: Qualcomm Incorporated

    Inventor： Chirag Dipak Patel ,  Xinmin Yu ,  Lai Kan Leung

    IPC: H01P1/18 ,  H03H11/22 ,  H04B7/06 ,  H03F3/60 ,  H03H11/20

    Abstract: An apparatus is disclosed for phase-shifting signals. In example implementations, the apparatus includes a phase shifter. The phase shifter includes a first port, a second port, a vector modulator coupled to the first port, and a signal phase generator. The signal phase generator includes multiple amplifiers coupled between the vector modulator and the second port. The signal phase generator also includes multiple capacitors that couple the multiple amplifiers together to form a loop. Each respective capacitor of the multiple capacitors is coupled between a respective pair of consecutive amplifiers of the multiple amplifiers to form the loop.

    Large-signal GM3 cancellation technique for highly-linear active mixers
    17.
    发明授权
    Large-signal GM3 cancellation technique for highly-linear active mixers 审中-公开

    公开(公告)号：US10673411B2

    公开(公告)日：2020-06-02

    申请号：US16256733

    申请日：2019-01-24

    Applicant: QUALCOMM Incorporated

    Inventor： Xinmin Yu ,  Lai Kan Leung ,  Yunfei Feng ,  Chirag Dipak Patel

    IPC: H03H11/04 ,  H03D7/14 ,  H04B1/40 ,  H04B1/28 ,  H04B1/00 ,  H04B1/16 ,  H04B1/04

    Abstract: The present disclosure provides an apparatus that includes a first mixer circuit configured to convert between an RF signal and an IF signal based at least in part on an local oscillator (LO) signal. The first mixer circuit is electrically coupled to a first node that is configured to receive the LO signal and a first bias voltage, a second node that is configured to receive the RF signal or the IF signal, and a third node that is configured to provide the IF signal or the RF signal. The apparatus further includes a second mixer circuit electrically coupled to a fourth node configured to receive the LO signal and a second bias voltage, the second node, and the third node. The second bias voltage has a voltage level that is offset from the first bias voltage.

    Complementary variable gain amplification
    18.
    发明授权
    Complementary variable gain amplification 有权

    公开(公告)号：US10651807B2

    公开(公告)日：2020-05-12

    申请号：US16115475

    申请日：2018-08-28

    Applicant: Qualcomm Incorporated

    Inventor： Timothy Donald Gathman ,  Chirag Dipak Patel ,  Lai Kan Leung ,  Xinmin Yu

    IPC: H03F3/04 ,  H03F1/22 ,  H03F3/68 ,  H03F1/02 ,  H03F3/195

    Abstract: An apparatus is disclosed for complementary variable gain amplification. In an example aspect, the apparatus includes a variable gain amplifier that includes multiple amplifiers. The multiple amplifiers include at least one first amplifier and at least one second amplifier cascaded together in series. The first amplifier includes a first set of transistors having a first doping type. At least a portion of the first set of transistors is configured to implement a first current mirror. The second amplifier includes a second set of transistors having a second doping type. At least a portion of the second set of transistors is configured to implement a second current mirror. The second current mirror is coupled to the first current mirror.

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