公开(公告)号：US08971219B2

公开(公告)日：2015-03-03

申请号：US13735795

申请日：2013-01-07

Applicant: QUALCOMM Incorporated

Inventor： Ojas M. Choksi

IPC: H04L5/14 ,  H03H7/46 ,  H03H7/09 ,  H04B1/44

CPC classification number: H03H7/463 ,  H03H7/09 ,  H03H7/466 ,  H03H7/468 ,  H03H2007/013 ,  H04L5/14

Abstract: An integrated duplexer based on electrical balance is described. The duplexer module includes a hybrid transformer. The hybrid transformer includes a primary coil and a secondary coil. The primary coil is coupled between an output of a power amplifier and an antenna. The secondary coil is coupled between an input of a low noise amplifier and ground. The duplexer also includes a balancing impedance that is coupled between the primary coil and the secondary coil.

Abstract translation: 描述了基于电气平衡的集成双工器。 双工器模块包括一个混合变压器。 混合变压器包括初级线圈和次级线圈。 初级线圈耦合在功率放大器的输出端与天线之间。 次级线圈耦合在低噪声放大器的输入端和地之间。 双工器还包括耦合在初级线圈和次级线圈之间的平衡阻抗。

公开(公告)号：US20140167862A1

公开(公告)日：2014-06-19

申请号：US13720836

申请日：2012-12-19

Applicant: QUALCOMM INCORPORATED

Inventor： Himanshu Khatri ,  Ojas M. Choksi ,  Wei Zhuo

IPC: H02H9/04 ,  H03F1/52

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：US20140139042A1

公开(公告)日：2014-05-22

申请号：US13773449

申请日：2013-02-21

Applicant: QUALCOMM INCORPORATED

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

IPC: H01F27/38 ,  H03F1/26

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.

Abstract translation: 用于改善在多个操作模式之间共享的变压器的性能的技术。 在一个方面，变压器的第一和第二初级绕组耦合到AC接地电压。 初级绕组相互耦合到变压器的次级绕组。 为了使第二初级绕组无效，例如当以第一模式操作时，将第二初级绕组耦合到公共参考电压的开关被打开。 类似地，当期望使第一初级绕组无效时，例如当在第二模式下操作时，将第一初级绕组耦合到公共参考电压的开关被打开。 以这种方式，无源初级绕组有利地不加载次级绕组。 另外的方面提供了例如将技术扩展到多于两种模式，以及将信号从初级绕组互相耦合到次级绕组的替代技术。

公开(公告)号：US20130259102A1

公开(公告)日：2013-10-03

申请号：US13769001

申请日：2013-02-15

Applicant: QUALCOMM INCORPORATED

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

IPC: H04B1/44

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.

公开(公告)号：US20130281041A1

公开(公告)日：2013-10-24

申请号：US13692883

申请日：2012-12-03

Applicant: QUALCOMM INCORPORATED

Inventor： Ojas M. Choksi ,  Wei Zhuo

IPC: H04B1/12

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：US20130258911A1

公开(公告)日：2013-10-03

申请号：US13735795

申请日：2013-01-07

Applicant: QUALCOMM INCORPORATED

Inventor： Ojas M. Choksi

IPC: H03H7/46 ,  H04L5/14

CPC classification number: H03H7/463 ,  H03H7/09 ,  H03H7/466 ,  H03H7/468 ,  H03H2007/013 ,  H04L5/14

Abstract: An integrated duplexer based on electrical balance is described. The duplexer module includes a hybrid transformer. The hybrid transformer includes a primary coil and a secondary coil. The primary coil is coupled between an output of a power amplifier and an antenna. The secondary coil is coupled between an input of a low noise amplifier and ground. The duplexer also includes a balancing impedance that is coupled between the primary coil and the secondary coil.

Abstract translation: 描述了基于电气平衡的集成双工器。 双工器模块包括一个混合变压器。 混合变压器包括初级线圈和次级线圈。 初级线圈耦合在功率放大器的输出端和天线之间。 次级线圈耦合在低噪声放大器的输入端和地之间。 双工器还包括耦合在初级线圈和次级线圈之间的平衡阻抗。

公开(公告)号：US20140113573A1

公开(公告)日：2014-04-24

申请号：US13658607

申请日：2012-10-23

Applicant: QUALCOMM INCORPORATED

Inventor： Himanshu Khatri ,  Ojas M. Choksi ,  Wei Zhuo

IPC: H04B1/44 ,  H03F3/68

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。

公开(公告)号：US20130295870A1

公开(公告)日：2013-11-07

申请号：US13645265

申请日：2012-10-04

Applicant: QUALCOMM INCORPORATED

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

IPC: H03D7/14

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。