公开(公告)号：US20230170861A1

公开(公告)日：2023-06-01

申请号：US18057597

申请日：2022-11-21

Applicant: Analog Devices, Inc.

Inventor： Christopher J. DAY

IPC: H03F3/24 ,  H03G3/30

CPC classification number: H03F3/245 ,  H03G3/3042 ,  H03F2200/129 ,  H03F2200/451 ,  H03G2201/103 ,  H03G2201/307

Abstract: Systems and methods that integrate a directional coupling function with directivity that does not have output loss are disclosed. For example, a power amplifier circuit arrangement includes an input terminal to receive an input signal; amplifier circuitry including a first amplifier stage, a second amplifier stage, and a virtual ground node, where an input of the first amplifier stage is coupled to the input terminal, an output of the first amplifier stage is coupled to an input of the second amplifier stage via the virtual ground node, and an output of the second amplifier stage is coupled to the input of the first amplifier stage via feedback circuitry; an output terminal coupled to the output of the second amplifier stage, the output terminal to output an amplified signal; and a directional coupler terminal coupled to the virtual ground node.