公开(公告)号：US09231529B2

公开(公告)日：2016-01-05

申请号：US14107135

申请日：2013-12-16

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Shafiullah Syed ,  Jiun How Ng

IPC: H03F1/26 ,  H03F1/32 ,  H03F3/193 ,  H03F3/68

CPC classification number: H03F1/3223 ,  H03F1/0277 ,  H03F1/223 ,  H03F1/26 ,  H03F3/193 ,  H03F3/68 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/451 ,  H03F2201/3206 ,  H03F2201/3221

Abstract: A low-noise amplifier is provided that includes an input amplifier stage coupled to a plurality of independently switchable output amplifier stages. The input amplifier stage is operative to amplify an input communications signal, and it provides both an amplified communications signal and a feedforward signal. The amplified communications signal and the feedforward signal both include a distortion component. Each of the switchable output stages is operative to provide an output that combines the feedforward signal with the amplified communications signal in such a way that the distortion components of the signals at least partially cancel one another. In some embodiments, the switching of the output amplifier stages is performed by circuitry that also serves to improve reverse isolation of the separate output amplifier stages.

Abstract translation: 提供了一种低噪声放大器，其包括耦合到多个可独立切换的输出放大器级的输入放大器级。 输入放大器级用于放大输入通信信号，并且其提供放大的通信信号和前馈信号。 放大的通信信号和前馈信号都包括失真分量。 每个可切换输出级可操作以提供将前馈信号与放大的通信信号组合的输出，使得信号的失真分量至少部分地彼此抵消。 在一些实施例中，输出放大器级的切换由也用于改善分离的输出放大器级的反向隔离的电路来执行。

公开(公告)号：US20150180516A1

公开(公告)日：2015-06-25

申请号：US14137042

申请日：2013-12-20

Applicant: Motorola Solutions, Inc.

Inventor： Raul Salvi ,  Joseph P. Heck ,  Geetha B. Nagaraj ,  Shafiullah Syed

IPC: H04B1/00 ,  H04B1/16

CPC classification number: H04B1/123 ,  H03G3/3052 ,  H04B1/0067

Abstract: Disclosed herein are systems for and methods of using a mirrored wideband baseband current for automatic gain control of an RF receiver. In an embodiment, a system includes an RF receiver having an adjustable gain and being configured to direct convert a received wideband RF signal to a wideband baseband current signal. The system further includes a current replicator coupled to the receiver and configured to generate a mirrored current of the wideband baseband current signal. The system further includes a wideband signal-level detector configured to receive the mirrored current from the current replicator, and to measure and output a signal-level value of the mirrored current. The system further includes an automatic gain-control circuit configured to receive the signal-level value from the wideband signal-level detector, and to adjust the gain of the receiver based at least in part on the received signal-level value.

Abstract translation: 本文公开了用于RF接收机的自动增益控制的用于镜像宽带基带电流的系统和方法。 在一个实施例中，系统包括具有可调节增益的RF接收机，并且被配置为将接收到的宽带RF信号直接转换为宽带基带电流信号。 该系统还包括耦合到接收器并被配置为产生宽带基带电流信号的镜像电流的当前复制器。 该系统还包括宽带信号电平检测器，其配置为从当前复制器接收镜像电流，并测量并输出镜像电流的信号电平值。 该系统还包括自动增益控制电路，其被配置为从宽带信号电平检测器接收信号电平值，并且至少部分地基于接收到的信号电平值来调整接收机的增益。

公开(公告)号：US20140145790A1

公开(公告)日：2014-05-29

申请号：US13687589

申请日：2012-11-28

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Shafiullah Syed ,  Joseph P. Heck

IPC: H03G3/30

CPC classification number: H03G1/0023 ,  H03G1/0029

Abstract: An apparatus with associated gain and input impedance includes gain devices, a switching unit and a resistor. A first differential pair of gain devices and associated bias circuitry is configured to operate in a full gain mode. A second differential pair of gain devices is configured to operate in a reduced gain mode. The switching unit is configured to disable the first differential pair of gain devices and enable the second differential pair of gain devices in the reduced gain mode and to disable the second differential pair of gain devices and enable the first differential pair of gain devices in the full gain mode. The resistor is configured to maintain constant input impedance of the apparatus when in the reduced gain mode.

Abstract translation: 具有相关增益和输入阻抗的装置包括增益器件，开关单元和电阻器。 增益器件和相关偏置电路的第一差分对被配置为以全增益模式工作。 增益器件的第二差分对被配置为以减小增益模式工作。 开关单元被配置为禁用第一差分增益器件对，并且使得能够在减小增益模式中的第二差分增益器件对，并且禁用第二差分增益器件对，并且使第一差分增益器件的全部使能 增益模式。 电阻器被配置为在处于减小增益模式时保持装置的恒定输入阻抗。

公开(公告)号：US09337878B2

公开(公告)日：2016-05-10

申请号：US14107336

申请日：2013-12-16

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Shafiullah Syed ,  John R. Melton ,  Jiun How Ng

IPC: H04B1/12 ,  H04W4/22 ,  H04W88/06 ,  H04B7/08 ,  H04W52/02 ,  H04B1/16

CPC classification number: H04B1/126 ,  H04B1/16 ,  H04B7/0817 ,  H04B7/082 ,  H04B7/0837 ,  H04B7/0871 ,  H04W4/90 ,  H04W52/02 ,  H04W52/0245 ,  H04W88/06 ,  Y02D70/00 ,  Y02D70/26 ,  Y02D70/40 ,  Y02D70/444

Abstract: A dual watch receiver is provided that, when operating in a single watch mode, receives a radio frequency (RF) signal, determines a signal quality metric associated with a received RF signal, and based on the determined signal quality metric, determines whether to route a same RF signal to only a first receiver path or to both of the first receiver path and a second receiver path, wherein the first receiver path and second receiver path process a received RF signal in parallel.

Abstract translation: 提供了一种双手表接收机，当在单个监视模式下操作时，接收射频（RF）信号，确定与所接收的RF信号相关联的信号质量度量，并且基于所确定的信号质量度量，确定是否路由 相同的RF信号到仅第一接收机路径或第一接收机路径和第二接收机路径两者，其中第一接收机路径和第二接收机路径并行处理接收到的RF信号。

公开(公告)号：US09331651B1

公开(公告)日：2016-05-03

申请号：US14585487

申请日：2014-12-30

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Jiun How Ng ,  Chong Hin Chee ,  Shafiullah Syed

IPC: H04L27/08 ,  H03G3/30 ,  H03M1/18 ,  H04B1/10

CPC classification number: H03G1/0088 ,  H03G3/3052 ,  H03G3/3078 ,  H04L27/3854

Abstract: A current mode receiver front end for a radio device converts a received signal into a current mode signal and applies automatic gain control by both shunting current of the current mode signal and providing an adjustable series resistance that further adjust the current level of the current mode signal that is output by the receiver front end. The shunt and series circuits can be controlled by a digital control word whose value represent a decibel value of adjustment, and which is used to drive the shunt and series circuits to achieve both coarse and fine adjustment of the current mode signal.

Abstract translation: 用于无线电设备的电流模式接收器前端将接收的信号转换为电流模式信号，并通过电流模式信号的分流电流施加自动增益控制，并提供可调节的串联电阻，其进一步调整电流模式信号的电流电平 由接收机前端输出。 分流电路和串联电路可以由数字控制字控制，数字控制字的值表示调整的分贝值，用于驱动分流电路和串联电路，以实现电流模式信号的粗调和微调。

公开(公告)号：US08810316B2

公开(公告)日：2014-08-19

申请号：US13687589

申请日：2012-11-28

Applicant: Motorola Solutions, Inc.

Inventor： Shafiullah Syed ,  Joseph P. Heck

IPC: H03F3/45 ,  H03G3/30

CPC classification number: H03G1/0023 ,  H03G1/0029

Abstract: An apparatus with associated gain and input impedance includes gain devices, a switching unit and a resistor. A first differential pair of gain devices and associated bias circuitry is configured to operate in a full gain mode. A second differential pair of gain devices is configured to operate in a reduced gain mode. The switching unit is configured to disable the first differential pair of gain devices and enable the second differential pair of gain devices in the reduced gain mode and to disable the second differential pair of gain devices and enable the first differential pair of gain devices in the full gain mode. The resistor is configured to maintain constant input impedance of the apparatus when in the reduced gain mode.

Abstract translation: 具有相关增益和输入阻抗的装置包括增益器件，开关单元和电阻器。 增益器件和相关偏置电路的第一差分对被配置为以全增益模式工作。 增益器件的第二差分对被配置为以减小增益模式工作。 开关单元被配置为禁用第一差分增益器件对，并且使能增益器件的第二差分对处于减小的增益模式，并且禁用第二差分增益器件对，并且使第一差分对的增益器件成为全 增益模式。 电阻器被配置为在处于减小增益模式时保持装置的恒定输入阻抗。

公开(公告)号：US09654159B2

公开(公告)日：2017-05-16

申请号：US14137042

申请日：2013-12-20

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Raul Salvi ,  Joseph P Heck ,  Geetha B Nagaraj ,  Shafiullah Syed

IPC: H04B1/12 ,  H04B1/00 ,  H03G3/30

CPC classification number: H04B1/123 ,  H03G3/3052 ,  H04B1/0067

Abstract: Disclosed herein are systems for and methods of using a mirrored wideband baseband current for automatic gain control of an RF receiver. In an embodiment, a system includes an RF receiver having an adjustable gain and being configured to direct convert a received wideband RF signal to a wideband baseband current signal. The system further includes a current replicator coupled to the receiver and configured to generate a mirrored current of the wideband baseband current signal. The system further includes a wideband signal-level detector configured to receive the mirrored current from the current replicator, and to measure and output a signal-level value of the mirrored current. The system further includes an automatic gain-control circuit configured to receive the signal-level value from the wideband signal-level detector, and to adjust the gain of the receiver based at least in part on the received signal-level value.