公开(公告)号：US11012104B2

公开(公告)日：2021-05-18

申请号：US15478926

申请日：2017-04-04

Applicant: ANALOG DEVICES, INC.

Inventor： David J. McLaurin ,  Christopher Mayer ,  Hatice Dicle Ozis Unsal ,  Zheng Gao

IPC: H04B1/04 ,  H03D7/16

Abstract: Apparatus and methods for calibrating radio frequency transmitters to compensate for common mode local oscillator leakage are provided herein. In certain configurations herein, a transmitter generates a radio frequency transmit signal based on mixing a baseband input signal with a local oscillator signal. The transmitter is calibrated to compensate for common mode local oscillator leakage. Thus, a common mode component of the local oscillator signal is reduced or eliminated from the radio frequency transmit signal, which provides a number of benefits, including lower levels of undesired emissions from the transmitter.

公开(公告)号：US20180254786A1

公开(公告)日：2018-09-06

申请号：US15478926

申请日：2017-04-04

Applicant: ANALOG DEVICES, INC.

Inventor： David J. McLaurin ,  Christopher Mayer ,  Hatice Dicle Ozis Unsal ,  Zheng Gao

IPC: H04B1/04 ,  H03D7/14

CPC classification number: H04B1/0475 ,  H03D7/165 ,  H03D2200/009

Abstract: Apparatus and methods for calibrating radio frequency transmitters to compensate for common mode local oscillator leakage are provided herein. In certain configurations herein, a transmitter generates a radio frequency transmit signal based on mixing a baseband input signal with a local oscillator signal. The transmitter is calibrated to compensate for common mode local oscillator leakage. Thus, a common mode component of the local oscillator signal is reduced or eliminated from the radio frequency transmit signal, which provides a number of benefits, including lower levels of undesired emissions from the transmitter.