公开(公告)号：WO2022029253A2

公开(公告)日：2022-02-10

申请号：PCT/EP2021/071920

申请日：2021-08-05

Applicant: ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANY

Inventor： REGGIANNINI, Brian ,  UNSAL, Hatice Ozis ,  ALLEN, Gordon ,  MAYER, Christopher ,  SCHUBERT, Richard ,  FAN, Jianxun ,  WU, Lu ,  PAMIR, Tolga ,  MONTALVO, Antonio ,  ALI, Ahmed ,  MCLAURIN, David

IPC: H04B1/04 ,  H04B1/525 ,  H04B1/0475

Abstract: Apparatus and methods for transceivers are provided herein. In a first aspect, an observation receiver is implemented to detect common-mode local oscillator (LO) leakage while the observation receiver performs other functions. In a second aspect, a transceiver is implemented with an LO leakage compensation circuit that compensates a transmitter for LO leakage using a digital filter, such as a Kalman filter, that combines differential LO leakage observations with common-mode LO leakage observations. In a third aspect, a transmitter includes multiple local loopback paths including a first loopback path after a variable gain amplifier (VGA) and a second loopback path before the VGA.

公开(公告)号：EP4193468A2

公开(公告)日：2023-06-14

申请号：EP21755752.9

申请日：2021-08-05

Applicant: Analog Devices International Unlimited Company

Inventor： REGGIANNINI, Brian ,  UNSAL, Hatice Ozis ,  ALLEN, Gordon ,  MAYER, Christopher ,  SCHUBERT, Richard ,  FAN, Jianxun ,  WU, Lu ,  PAMIR, Tolga ,  MONTALVO, Antonio ,  ALI, Ahmed ,  MCLAURIN, David

IPC: H04B1/04 ,  H04B1/525