公开(公告)号：US20190341894A1

公开(公告)日：2019-11-07

申请号：US16365783

申请日：2016-09-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhonghua CAI ,  Lipeng ZHANG ,  Kaizhan WANG ,  Zhiyuan PANG ,  Sheng ZHU

IPC: H03F3/21 ,  H03F1/56 ,  H03F3/217 ,  H03F3/193

Abstract: Embodiments of the present invention provide a power amplifier, a radio remote unit RRU, and a base station. A multiphase pulse width modulator performs modulation to generate N multiphase pulse-width modulation PWM signals. The multiphase pulse-width modulation PWMn signal may be amplified. The multiphase pulse-width modulation PWMn signal may be filtered and a combination may be performed at a drain or a collector of a power amplifier transistor. According to the new radio frequency amplifier in accordance with the disclosure, envelope feeding loop inductance can be effectively reduced, so that video bandwidth is increased and DPD correction performance is improved.