公开(公告)号：US20240187025A1

公开(公告)日：2024-06-06

申请号：US18528530

申请日：2023-12-04

Applicant: Innophase, Inc. ,  Parallel Wireless, Inc.

Inventor： Christopher Mobbs ,  Yang Xu

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H04B2001/0441

Abstract: An apparatus and a method include receiving, by a transmitter integrated circuit (IC) having a serial data communications interface, a digital transmit signal, and generating a first signal that is an analog radio frequency (RF) modulated signal based on the digital transmit signal and a second signal that is a phase-offset version of the first signal. An amplified signal is generated by amplifying the first signal and includes an amplified version of the first signal and an out-of-band distortion signal. A reduced-power signal is generated from the amplified signal. The reduced-power signal is subtracted from the second signal to output a distortion cancellation signal. An amplified distortion cancellation signal is generated by amplifying the distortion cancellation signal using an error amplifier. The amplified distortion cancellation signal and a delayed version of the amplified signal are combined to output an amplified version of the first signal with reduced distortion.