公开(公告)号：US20240429867A1

公开(公告)日：2024-12-26

申请号：US18340796

申请日：2023-06-23

Applicant: QUALCOMM Incorporated

Inventor： Sherif MAHMOUD SHAKIB ROSHDY ,  Jeremy Darren DUNWORTH ,  Jorge GARCIA ,  Paul Brian SHEEHY

IPC: H03D7/12 ,  H03B5/24

Abstract: A communication system includes a passive quadrature generator connected directly to an in-phase (I) mixer and a quadrature (Q) mixer, an I LO amplitude detect circuit connected to the passive quadrature generator and connected to the I mixer, and a Q LO amplitude detect circuit connected to the passive quadrature generator and connected to the Q mixer, the I LO amplitude detect circuit configured to detect an I LO amplitude and the Q LO amplitude detect circuit configured to detect a Q LO amplitude, and a combining and integrating circuit configured to receive the detected I LO amplitude and the detected Q LO amplitude and generate an I LO DC bias voltage to bias the I mixer and a Q LO DC bias voltage to bias the Q mixer.