公开(公告)号：US08994450B2

公开(公告)日：2015-03-31

申请号：US14289295

申请日：2014-05-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xikun Zhang ,  Yawen Zhang ,  Song Li ,  Qiao Wu ,  Xuekun Li

IPC: H03F3/18 ,  H03F3/24 ,  H03F1/02 ,  H03F3/21

CPC classification number: H03F3/245 ,  H03F1/0272 ,  H03F1/0288 ,  H03F3/211 ,  H03F2200/18 ,  H03F2203/21106

Abstract: One aspect of the present invention provides a method for improving power amplification efficiency of a Doherty power amplifier. The method is applied to a Doherty power amplifier that has two paths of Doherty circuit units connected in parallel. The method includes: when output power of the Doherty power amplifier is within a low out power range, adjusting, by a bias circuit, gate voltages of main power amplifiers and peak power amplifiers in the two paths of Doherty circuit units connected in parallel, in order to cause the peak power amplifiers to be in an off state, and the main power amplifiers in the two paths of Doherty circuit units connected in parallel to be in a main power amplification state and a peak power amplification state respectively.

Abstract translation: 本发明的一个方面提供了一种用于提高多赫蒂功率放大器的功率放大效率的方法。 该方法应用于Doherty功率放大器，其具有并联连接的Doherty电路单元的两条路径。 该方法包括：当Doherty功率放大器的输出功率处于低功率范围内时，通过偏置电路调节并联连接的Doherty电路单元的两个路径中的主功率放大器和峰值功率放大器的栅极电压， 以使峰值功率放大器处于断开状态，并且Doherty电路单元的两个路径中的主功率放大器分别并联连接成主功率放大状态和峰值功率放大状态。