公开(公告)号：US09467093B2

公开(公告)日：2016-10-11

申请号：US13645265

申请日：2012-10-04

Applicant: QUALCOMM Incorporated

Inventor： Wei Zhuo ,  Ojas M Choksi ,  Prasad Srinivasa Siva Gudem

IPC: H04B1/26 ,  H03D7/14 ,  H04B1/38 ,  H04L25/00 ,  H04B1/00 ,  H04B1/18

CPC classification number: H03D7/1466 ,  H04B1/005 ,  H04B1/18

Abstract: A single-ended receiver is described. The single-ended receiver includes a multi-port transformer that outputs a differential signal. The multi-port transformer includes a first primary coil that is coupled to an output of a first low noise amplifier. The multi-port transformer also includes a second primary coil that is coupled to an output of a second low noise amplifier. The multi-port transformer further includes a first secondary coil. The single-ended receiver also includes a shared mixer that receives the differential signal from the multi-port transformer.

Abstract translation: 描述了单端接收机。 单端接收器包括输出差分信号的多端口变压器。 多端口变压器包括耦合到第一低噪声放大器的输出的第一初级线圈。 多端口变压器还包括耦合到第二低噪声放大器的输出的第二初级线圈。 多端口变压器还包括第一次级线圈。 单端接收机还包括从多端口变压器接收差分信号的共享混频器。

公开(公告)号：US09118396B2

公开(公告)日：2015-08-25

申请号：US13769001

申请日：2013-02-15

Applicant: QUALCOMM Incorporated

Inventor： Prasad Srinivasa Siva Gudem ,  Ojas M Choksi ,  Wei Zhuo

IPC: H04B1/38 ,  H04L5/16 ,  H04B1/44 ,  H04B1/3805 ,  H04B1/525 ,  H04B17/354 ,  H04B1/10 ,  H04B17/24

CPC classification number: H04B1/44 ,  H04B1/1036 ,  H04B1/3805 ,  H04B1/525 ,  H04B17/24 ,  H04B17/354

Abstract: A wireless communication device configured for reducing Tx leakage in a receive signal is described. The wireless communication device includes a transceiver chip. The transceiver chip includes a receiver, a feedback receiver and a transmitter. The wireless communication device also includes a Tx leakage signal reduction module. The Tx leakage signal reduction module reuses the feedback receiver.

Abstract translation: 描述了配置用于减少接收信号中的Tx泄漏的无线通信设备。 无线通信设备包括收发器芯片。 收发器芯片包括接收器，反馈接收器和发射器。 无线通信设备还包括Tx泄漏信号降低模块。 Tx泄漏信号降低模块重新使用反馈接收器。

公开(公告)号：US09106072B2

公开(公告)日：2015-08-11

申请号：US13720836

申请日：2012-12-19

Applicant: QUALCOMM Incorporated

Inventor： Himanshu Khatri ,  Ojas M Choksi ,  Wei Zhuo

IPC: H03F1/52 ,  H02H9/04 ,  H03F1/22

CPC classification number: H02H9/043 ,  H03F1/223 ,  H03F1/52 ,  H03F1/523

Abstract: Exemplary embodiments are directed to providing electrostatic discharge (ESD) protection of a cascode device of an amplifier. In an exemplary embodiment, a transistor is configured to receive a bias voltage and at least one circuit element coupled to the transistor and configured to receive an input voltage via an input pad. Additionally at least one diode can be coupled to a drain of the first transistor and configured to limit a voltage potential at an internal node of the amplifier caused by the input pad.

Abstract translation: 示例性实施例涉及提供放大器的共射共基器件的静电放电（ESD）保护。 在示例性实施例中，晶体管被配置为接收偏置电压，并且耦合到晶体管的至少一个电路元件被配置为经由输入焊盘接收输入电压。 此外，至少一个二极管可以耦合到第一晶体管的漏极并且被配置为限制由输入焊盘引起的放大器的内部节点处的电压电位。

公开(公告)号：US20140111252A1

公开(公告)日：2014-04-24

申请号：US13659700

申请日：2012-10-24

Applicant: QUALCOMM INCORPORATED

Inventor： Wei Zhuo ,  Himanshu Khatri ,  Ojas M Choksi

IPC: H03K17/06

CPC classification number: H03D7/12 ,  H03F1/301

Abstract: Bias voltage generators that can generate variable bias voltages for transistors in mixers and other circuits are disclosed. In an exemplary design, an apparatus (e.g., a wireless device or an integrated circuit (IC)) includes at least one transistor and a bias voltage generator. The transistor(s) have a threshold voltage and receive a bias voltage. The bias voltage generator generates the bias voltage based on changes to the threshold voltage of the transistor(s), e.g., due to IC process and/or temperature. In an exemplary design, the bias voltage generator includes a replica transistor that tracks the transistor(s) and an op-amp that provides a gate voltage for the replica transistor. The bias voltage is generated based on the gate voltage. The bias voltage generator may generate the bias voltage (i) to track the threshold voltage of the transistor(s) in a first mode or (ii) based on a fixed voltage in a second mode.

Abstract translation: 公开了可以在混合器和其他电路中为晶体管产生可变偏压的偏压电压发生器。 在示例性设计中，装置（例如，无线装置或集成电路（IC））包括至少一个晶体管和偏置电压发生器。 晶体管具有阈值电压并接收偏置电压。 偏置电压发生器基于对晶体管的阈值电压的变化产生偏置电压，例如由于IC工艺和/或温度而产生偏置电压。 在示例性设计中，偏置电压发生器包括跟踪晶体管的复制晶体管和为复制晶体管提供栅极电压的运算放大器。 基于栅极电压产生偏置电压。 偏置电压发生器可以产生偏置电压（i）以在第一模式中跟踪晶体管的阈值电压，或者（ii）基于第二模式中的固定电压。

公开(公告)号：US20130259099A1

公开(公告)日：2013-10-03

申请号：US13692854

申请日：2012-12-03

Applicant: QUALCOMM INCORPORATED

Inventor： Prasad Srinivasa Siva Gudem ,  Ojas M Choksi ,  Wei Zhuo

IPC: H04B1/44

CPC classification number: H04B1/44 ,  H04B1/1036 ,  H04B1/3805 ,  H04B1/525 ,  H04B17/24 ,  H04B17/354

Abstract: A wireless communication device configured for reducing Tx leakage in a receive signal is described. The wireless communication device includes a transceiver chip. The transceiver chip includes a receiver, a feedback receiver and a transmitter. The wireless communication device also includes a Tx leakage signal reduction module. The Tx leakage signal reduction module reuses the feedback receiver.

Abstract translation: 描述了配置用于减少接收信号中的Tx泄漏的无线通信设备。 无线通信设备包括收发器芯片。 收发器芯片包括接收器，反馈接收器和发射器。 无线通信设备还包括Tx泄漏信号降低模块。 Tx泄漏信号降低模块重新使用反馈接收器。

公开(公告)号：US09608574B2

公开(公告)日：2017-03-28

申请号：US13773449

申请日：2013-02-21

Applicant: QUALCOMM Incorporated

Inventor： Ojas M Choksi ,  Himanshu Khatri ,  Faramarz Sabouri ,  Wei Zhuo

IPC: H03F1/26 ,  H04B1/18 ,  H01F29/00

CPC classification number: H03F1/26 ,  H01F29/00 ,  H04B1/18 ,  Y10T307/74

Abstract: Techniques for improving performance of a transformer shared amongst a plurality of operating modes. In an aspect, first and second primary windings of a transformer are coupled to an AC ground voltage. Primary windings are mutually coupled to a secondary winding of the transformer. To render the second primary winding inactive, e.g., when operating in a first mode, a switch coupling the second primary winding to the common reference voltage is opened. Similarly, when it is desired to render the first primary winding inactive, e.g., when operating in a second mode, a switch coupling the first primary winding to the common reference voltage is opened. In this manner, the inactive primary winding advantageously does not load the secondary winding. Further aspects provide for, e.g., extending the techniques to more than two modes, and alternative techniques to mutually couple the signal from the primary to the secondary winding.

公开(公告)号：US09154079B2

公开(公告)日：2015-10-06

申请号：US13659700

申请日：2012-10-24

Applicant: QUALCOMM Incorporated

Inventor： Wei Zhuo ,  Himanshu Khatri ,  Ojas M Choksi

IPC: G05F1/10 ,  G11C5/14 ,  H03D7/12 ,  H03F1/30

CPC classification number: H03D7/12 ,  H03F1/301

Abstract: Bias voltage generators that can generate variable bias voltages for transistors in mixers and other circuits are disclosed. In an exemplary design, an apparatus (e.g., a wireless device or an integrated circuit (IC)) includes at least one transistor and a bias voltage generator. The transistor(s) have a threshold voltage and receive a bias voltage. The bias voltage generator generates the bias voltage based on changes to the threshold voltage of the transistor(s), e.g., due to IC process and/or temperature. In an exemplary design, the bias voltage generator includes a replica transistor that tracks the transistor(s) and an op-amp that provides a gate voltage for the replica transistor. The bias voltage is generated based on the gate voltage. The bias voltage generator may generate the bias voltage (i) to track the threshold voltage of the transistor(s) in a first mode or (ii) based on a fixed voltage in a second mode.

Abstract translation: 公开了可以在混合器和其他电路中为晶体管产生可变偏压的偏压电压发生器。 在示例性设计中，装置（例如，无线装置或集成电路（IC））包括至少一个晶体管和偏置电压发生器。 晶体管具有阈值电压并接收偏置电压。 偏置电压发生器基于对晶体管的阈值电压的变化产生偏置电压，例如由于IC工艺和/或温度而产生偏置电压。 在示例性设计中，偏置电压发生器包括跟踪晶体管的复制晶体管和为复制晶体管提供栅极电压的运算放大器。 基于栅极电压产生偏置电压。 偏置电压发生器可以产生偏置电压（i）以在第一模式中跟踪晶体管的阈值电压，或者（ii）基于第二模式中的固定电压。

公开(公告)号：US08989691B2

公开(公告)日：2015-03-24

申请号：US13692883

申请日：2012-12-03

Applicant: QUALCOMM Incorporated

Inventor： Ojas M Choksi ,  Wei Zhuo

IPC: H04B1/10 ,  H04B1/12 ,  H04B1/18

CPC classification number: H04B1/12 ,  H04B1/18

Abstract: Power supply rejection in a single-ended receiver, through impedance balancing, is described. The single-ended receiver includes a first low noise amplifier and a second low noise amplifier. The single-ended receiver also includes a multi-port coupled transformer that outputs a differential signal. The multi-port coupled transformer includes a first primary coil that is coupled to an output of the first low noise amplifier and a second primary coil. The single-ended receiver also includes balancing impedances at the output of each of the low noise amplifiers. These impedances can be configured such that the on impedance of the first low noise amplifier equals the combined impedance of the off impedance of the second low noise amplifier and the balancing impedance. This balancing of impedances on the first and second primary coils results in power supply rejection of noise and spurious signals.

Abstract translation: 描述了通过阻抗平衡在单端接收机中的电源抑制。 单端接收机包括第一低噪声放大器和第二低噪声放大器。 单端接收器还包括输出差分信号的多端口耦合变压器。 多端口耦合变压器包括耦合到第一低噪声放大器和第二初级线圈的输出的第一初级线圈。 单端接收机还包括每个低噪声放大器输出端的平衡阻抗。 这些阻抗可被配置为使得第一低噪声放大器的导通阻抗等于第二低噪声放大器的阻抗与平衡阻抗的组合阻抗。 这种第一和第二初级线圈上的阻抗的平衡导致噪声和杂散信号的电源抑制。

公开(公告)号：US08913976B2

公开(公告)日：2014-12-16

申请号：US13658607

申请日：2012-10-23

Applicant: QUALCOMM Incorporated

Inventor： Himanshu Khatri ,  Ojas M Choksi ,  Wei Zhuo

IPC: H04B1/10

CPC classification number: H03F3/72 ,  H03F1/0277 ,  H03F1/223 ,  H03F3/195 ,  H03F3/211 ,  H03F2200/111 ,  H03F2200/294 ,  H03F2200/429 ,  H03F2203/21109 ,  H03F2203/7209 ,  H03F2203/7215 ,  H03F2203/7236 ,  H03F2203/7239 ,  H03G3/3052

Abstract: Amplifiers with shunt switches to mitigate interference are disclosed. In an exemplary design, an apparatus includes an amplifier and a shunt switch. The amplifier has an input operatively coupled to an input/output (I/O) pad of an integrated circuit (IC) chip. The shunt switch grounds the amplifier when the shunt switch is closed. The shunt switch is isolated from the I/O pad and the amplifier input. The amplifier may be a low noise amplifier (LNA) or some other type of amplifier. In an exemplary design, the shunt switch is isolated from the I/O pad by a series switch. The series switch and the shunt switch may be closed when the amplifier is disabled and may be opened when the amplifier is enabled.

Abstract translation: 公开了具有用于减轻干扰的分流开关的放大器。 在示例性设计中，装置包括放大器和分流开关。 放大器具有可操作地耦合到集成电路（IC）芯片的输入/输出（I / O）焊盘的输入。 分流开关闭合时，分流开关接地放大器。 分流开关与I / O焊盘和放大器输入隔离。 放大器可以是低噪声放大器（LNA）或一些其他类型的放大器。 在示例性设计中，分流开关通过串联开关与I / O焊盘隔离。 当放大器禁用时，串联开关和并联开关可能关闭，并且当放大器使能时可以打开。