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.