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.

公开(公告)号：US10014845B2

公开(公告)日：2018-07-03

申请号：US15472055

申请日：2017-03-28

Applicant: QUALCOMM INCORPORATED

Inventor： Timothy Donald Gathman ,  Chirag Dipak Patel ,  Sasha Vujcic ,  Aleksandar Miodrag Tasic ,  Wu-Hsin Chen ,  Klaas van Zalinge

IPC: H04B1/10 ,  H03H11/32 ,  H03F3/19 ,  H03F3/21 ,  H03F3/45 ,  H04L7/033

CPC classification number: H03H11/32 ,  H03F1/086 ,  H03F1/3205 ,  H03F1/3217 ,  H03F1/3223 ,  H03F3/19 ,  H03F3/193 ,  H03F3/21 ,  H03F3/3022 ,  H03F3/45183 ,  H03F3/45237 ,  H03F3/45475 ,  H03F2200/06 ,  H03F2200/09 ,  H03F2200/129 ,  H03F2200/144 ,  H03F2200/18 ,  H03F2200/21 ,  H03F2200/24 ,  H03F2200/294 ,  H03F2200/321 ,  H03F2200/33 ,  H03F2200/42 ,  H03F2200/451 ,  H03F2200/453 ,  H03F2200/555 ,  H03F2203/30069 ,  H03F2203/45091 ,  H03F2203/45101 ,  H03F2203/45116 ,  H03F2203/45136 ,  H03F2203/45208 ,  H03F2203/45288 ,  H03F2203/45374 ,  H03F2203/45458 ,  H03F2203/45526 ,  H03F2203/45528 ,  H03F2203/45544 ,  H03F2203/45596 ,  H03F2203/45712 ,  H04L7/0337

Abstract: A circuit includes an active balun having an RF signal input and having differential signal outputs, the active balun including a first pair of transistors coupled to the RF signal input, the first pair of transistors including a first transistor of a first type and a second transistor of a second type, wherein the first type and second type are complementary; and an intermodulation distortion (IMD) sink circuit having an operational amplifier (op amp) coupled between a first node and a second node, wherein the first transistor and second transistor are coupled in series between the first node and the second node.

公开(公告)号：US20180048294A1

公开(公告)日：2018-02-15

申请号：US15472055

申请日：2017-03-28

Applicant: QUALCOMM INCORPORATED

Inventor： Timothy Donald Gathman ,  Chirag Dipak Patel ,  Sasha Vujcic ,  Aleksandar Miodrag Tasic ,  Wu-Hsin Chen ,  Klaas van Zalinge

IPC: H03H11/32 ,  H04L7/033 ,  H03F3/45 ,  H03F3/19 ,  H03F3/21

CPC classification number: H03H11/32 ,  H03F1/086 ,  H03F1/3205 ,  H03F1/3217 ,  H03F1/3223 ,  H03F3/19 ,  H03F3/193 ,  H03F3/21 ,  H03F3/3022 ,  H03F3/45183 ,  H03F3/45237 ,  H03F3/45475 ,  H03F2200/06 ,  H03F2200/09 ,  H03F2200/129 ,  H03F2200/144 ,  H03F2200/18 ,  H03F2200/21 ,  H03F2200/24 ,  H03F2200/294 ,  H03F2200/321 ,  H03F2200/33 ,  H03F2200/42 ,  H03F2200/451 ,  H03F2200/453 ,  H03F2200/555 ,  H03F2203/30069 ,  H03F2203/45091 ,  H03F2203/45101 ,  H03F2203/45116 ,  H03F2203/45136 ,  H03F2203/45208 ,  H03F2203/45288 ,  H03F2203/45374 ,  H03F2203/45458 ,  H03F2203/45526 ,  H03F2203/45528 ,  H03F2203/45544 ,  H03F2203/45596 ,  H03F2203/45712 ,  H04L7/0337

Abstract: A circuit includes an active balun having an RF signal input and having differential signal outputs, the active balun including a first pair of transistors coupled to the RF signal input, the first pair of transistors including a first transistor of a first type and a second transistor of a second type, wherein the first type and second type are complementary; and an intermodulation distortion (IMD) sink circuit having an operational amplifier (op amp) coupled between a first node and a second node, wherein the first transistor and second transistor are coupled in series between the first node and the second node.

公开(公告)号：US11632098B2

公开(公告)日：2023-04-18

申请号：US17211716

申请日：2021-03-24

Applicant: Qualcomm Incorporated

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

IPC: H03H11/22 ,  H03H11/04

Abstract: An example apparatus includes a polyphase transconductance-capacitor filter. The polyphase filter includes a DC bias voltage node, a plus in-phase filter unit, a minus in-phase filter unit, a plus quadrature-phase filter unit, and a minus quadrature-phase filter unit. Each filter unit respectively includes an input node, an output node, and a control node. The polyphase filter also includes a plus in-phase switch and a minus in-phase switch. The plus in-phase switch is coupled to the control node of the plus in-phase filter unit, the DC bias voltage node, and the input node of one or both of the plus quadrature-phase filter unit and the minus quadrature-phase filter unit. The minus in-phase switch is coupled to the control node of the minus in-phase filter unit, the DC bias voltage node, and the input node of one or both of the plus quadrature-phase filter unit and the minus quadrature-phase filter unit.

公开(公告)号：US10193580B2

公开(公告)日：2019-01-29

申请号：US15927022

申请日：2018-03-20

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/00 ,  H03F3/72 ,  H03F3/24 ,  H03F1/42 ,  H04B1/06 ,  H04B1/719

Abstract: Devices and techniques are described to extract specific frequency band signals from a wide-band radio-frequency signal. A network entity may include an antenna for receiving the wide-band radio-frequency signal and may include a receiver circuit for processing the wide-band radio-frequency signal. The receiver circuit may include a transconductance amplifier and a plurality of single-band circuits. The transconductance amplifier may be configured to generate an amplified wide-band radio-frequency signal and send it to one or more of the single-band circuits. Each single-band circuit may be configured to extract a different frequency band signal from the amplified wide-band radio-frequency signal.

公开(公告)号：US09948239B2

公开(公告)日：2018-04-17

申请号：US15272124

申请日：2016-09-21

Applicant: QUALCOMM Incorporated

Inventor： Kiyong Choi ,  Yi Zeng ,  Hong Sun Kim ,  Sasha Vujcic ,  Chirag Dipak Patel ,  Aleksandar Miodrag Tasic ,  Timothy Donald Gathman ,  Wu-Hsin Chen ,  Klaas van Zalinge

IPC: G06G7/16 ,  H03D7/14 ,  H03F3/193 ,  H03F3/21 ,  H03F3/45 ,  H03G3/30 ,  H04W52/02

CPC classification number: H03D7/1458 ,  H03D7/1441 ,  H03D7/1466 ,  H03F3/193 ,  H03F3/21 ,  H03F3/265 ,  H03F3/72 ,  H03F2200/09 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/537 ,  H03F2200/541 ,  H03G3/3052 ,  H04B1/109 ,  H04W52/0209

Abstract: A method and apparatus are disclosed for a configurable mixer capable of operating in a linear, a legacy, and a low-power mode. In the linear mode, the configurable mixer is configured to operate as a double-balanced mixer to multiply a first differential signal by a second differential signal. In the legacy mode, the configurable mixer is configured to as a double-balanced mixer to multiply a differential signal by a single-ended signal. In the low-power mode, the configurable mixer is configured to operate as a single-balanced mixer to multiply a differential signal by a single-ended signal. The operating mode of the configurable mixer may be based, at least in part, on a mode control signal. In some embodiments, the configurable mixer may be included in an analog front end of a wireless communication device.

公开(公告)号：US20150236014A1

公开(公告)日：2015-08-20

申请号：US14476086

申请日：2014-09-03

Applicant: QUALCOMM Incorporated

Inventor： Timothy Donald Gathman

IPC: H01L27/08 ,  H01L29/93 ,  H03K17/687 ,  H01L29/94

CPC classification number: H01L27/0808 ,  H01L23/5223 ,  H01L27/0805 ,  H01L28/86 ,  H01L29/93 ,  H01L29/94 ,  H01L2924/0002 ,  H03K17/687 ,  H01L2924/00

Abstract: A device includes a first stacked capacitor comprising a first MOS capacitance and a first MOM capacitance, the first MOS capacitance coupled to a first node, the first node configured to receive a first bias voltage, and a second stacked capacitor comprising a second MOS capacitance and a second MOM capacitance, the second MOS capacitance coupled to the first node.

Abstract translation: 一种器件包括：第一层叠电容器，包括第一MOS电容和第一MOM电容，所述第一MOS电容耦合到第一节点，所述第一节点被配置为接收第一偏置电压;以及第二堆叠电容器，包括第二MOS电容和 第二MOM电容，所述第二MOS电容耦合到所述第一节点。

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.

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.

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.