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：US20150358041A1

公开(公告)日：2015-12-10

申请号：US14297761

申请日：2014-06-06

Applicant: QUALCOMM Incorporated

Inventor： Meng Li ,  Kevin Hsi-huai Wang ,  Ryan Scott Castro Spring ,  Himanshu Khatri ,  Hong-Ming Lee

IPC: H04B1/10

CPC classification number: H04B1/1036 ,  H04B1/109 ,  H04B1/525 ,  H04B2001/1063

Abstract: A device includes a tunable filter having an adjustable inductance and an adjustable capacitance, the tunable filter having a first tuning input responsive to a first control signal related to filter frequency band information, and a second tuning input responsive to a second control signal related to a jammer signal.

Abstract translation: 一种器件包括具有可调电感和可调电容的可调谐滤波器，该可调谐滤波器具有响应于与滤波器频带信息相关的第一控制信号的第一调谐输入和响应于与第一调谐信号相关的第二控制信号的第二调谐输入 干扰信号。

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：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。

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。