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：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：US10361734B1

公开(公告)日：2019-07-23

申请号：US15978512

申请日：2018-05-14

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Jiun How Ng ,  Dongho Han ,  Moh Lim Sim

IPC: H04B1/16 ,  H04B1/10 ,  H04B1/26

Abstract: A device and method for reducing intermodulation within a radio receiver. The device includes an intermodulation filter. The intermodulation filter is configured to receive a signal, apply a first filter and a second filter to the signal to generate a first and a second filtered signal. The intermodulation filter is configured to isolate a first intermodulation component located on a first side of a frequency spectrum of the signal within the second filtered signal, determine an estimated second intermodulation component based on a potential frequency band location, determine a correction factor based on an amplitude and phase relationship between the first and second intermodulation components, apply the correction factor to the estimated second intermodulation component, determine if the second intermodulation component exceeds a predetermined power threshold, and apply the adjusted estimated second intermodulation component to the first filtered signal, suppressing the second intermodulation component.

公开(公告)号：US10236896B1

公开(公告)日：2019-03-19

申请号：US15918938

申请日：2018-03-12

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Christian Ibarra ,  Jiun How Ng

IPC: H03L7/089 ,  H03L7/18 ,  H03L7/107

Abstract: Reducing transient response in a phase-locked loop circuit. In one instance, a system including a phase detector; a cycle slip detector; and a charge pump electrically connected to the phase detector is provided. The charge pump includes an adapt mode charge pump configured to bypass the phase detector with the cycle slip detector when a frequency error surpasses a first error threshold and an instantaneous frequency surpasses a desired frequency threshold. The charge pump also includes an adapt mode, programmable trickle current source configured to provide a ramp-up trickle current to the phase-locked loop circuit.

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。