公开(公告)号：US20150171798A1

公开(公告)日：2015-06-18

申请号：US14107135

申请日：2013-12-16

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： SHAFIULLAH SYED ,  JIUN HOW NG

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

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 as 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相互抵消。 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：US20150171907A1

公开(公告)日：2015-06-18

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 ,  H04W88/06 ,  H04W4/22

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。