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1.发明申请SYSTEMS FOR AND METHODS OF USING A MIRRORED WIDEBAND BASEBAND CURRENT FOR AUTOMATIC GAIN CONTROL OF AN RF RECEIVER 有权用于RF接收机自动增益控制的旋转宽带基带电流的系统和方法公开(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
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。
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公开(公告)号：US11387859B2
公开(公告)日：2022-07-12
申请号：US16915041
申请日：2020-06-29
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Sumit A Talwalkar , Geetha B. Nagaraj , Nicholas G. Cafaro
Abstract: An improved superheterodyne receiver for a portable radio is provided. The receiver includes a frequency controller that applies pulse-shaped modulation to first and second LO signals in a synchronized manner. The frequency controller is steered by Artificial Intelligence (AI) based machine learning (ML) to determine first and second LOs that minimize image interference in the baseband signal.
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3.发明申请公开(公告)号：US20190036747A1
公开(公告)日：2019-01-31
申请号：US15660723
申请日：2017-07-26
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Joseph P. Heck , Christopher Calvo , Rodger W. Caruthers , Nicholas G. Cafaro , Geetha B. Nagaraj , Raul Salvi
CPC classification number: H04L27/14 , H03K5/1565 , H04B1/0007 , H04B1/16
Abstract: Systems and methods for processing radiofrequency signals using modulation duty cycle scaling. One system includes a first receive path configured to directly sample a first signal in a first frequency range. The system includes a second receive path configured to convert a second signal in a second frequency range. The second receive path includes a receive modulator operating over a duty cycle. The receive modulator is configured to adjust the duty cycle by a predetermined scaling factor.
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4.发明授权公开(公告)号：US10439850B2
公开(公告)日：2019-10-08
申请号：US15660723
申请日：2017-07-26
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Joseph P. Heck , Christopher Calvo , Rodger W. Caruthers , Nicholas G. Cafaro , Geetha B. Nagaraj , Raul Salvi
Abstract: Systems and methods for processing radiofrequency signals using modulation duty cycle scaling. One system includes a first receive path configured to directly sample a first signal in a first frequency range. The system includes a second receive path configured to convert a second signal in a second frequency range. The second receive path includes a receive modulator operating over a duty cycle. The receive modulator is configured to adjust the duty cycle by a predetermined scaling factor.
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