公开(公告)号：US11509269B2

公开(公告)日：2022-11-22

申请号：US16995468

申请日：2020-08-17

Applicant: QUALCOMM INCORPORATED

Inventor： Jisun Ryu ,  Yan Kit Gary Hau ,  Guoqing Fu ,  Xinwei Wang ,  Xiangdong Zhang ,  Chenliang Du

IPC: H03F1/30 ,  H03F3/21

Abstract: An amplifier circuit includes an amplifier configured to receive a radio frequency (RF) input signal from an input node, a bias circuit comprising a reference transistor coupled between a reference current source and ground, and a bias transistor coupled to the reference transistor and configured to generate a main bias current to bias the amplifier, an input power sense circuit coupled to the input node, and an additional transistor coupled to the input power sense circuit and to the bias transistor, the additional transistor configured to generate an additional bias current to bias the amplifier, the additional bias current responsive to a power level of the RF input signal.

公开(公告)号：US11323079B2

公开(公告)日：2022-05-03

申请号：US16804929

申请日：2020-02-28

Applicant: QUALCOMM Incorporated

Inventor： Jing-Hwa Chen ,  Junzhi Yu ,  Yan Kit Gary Hau ,  Guoqing Fu ,  Xinwei Wang ,  Xiangdong Zhang

IPC: H03F3/191 ,  H03F1/56 ,  H03F3/24 ,  H03F1/02 ,  H03F3/60 ,  H03F3/195

Abstract: Certain aspects of the present disclosure are directed to an amplifier. The amplifier may include a transistor coupled to an output of the amplifier, and a resonator coupled between the output of the amplifier and a reference potential node, a resonant frequency of the resonator being set to be at a subharmonic of a fundamental frequency of the amplifier, and an impedance of the resonator being greater than a load impedance of the amplifier at the fundamental frequency of the amplifier.