公开(公告)号：US20230378988A1

公开(公告)日：2023-11-23

申请号：US17749987

申请日：2022-05-20

Applicant: Apple Inc.

Inventor： Linxiao Zhang ,  Utku Seckin ,  Vikram Magoon

IPC: H04B1/18

CPC classification number: H04B1/18

Abstract: This disclosure is directed to a radio frequency front end circuit with improved receiver. The radio frequency front end circuit may include one or more antennas coupled directly to a mixer of the receiver. The mixer may include sampling circuitry to provide sampled signals based on receiving received signals from the one or more antennas. For example, the mixer may provide the sampled signals to a low noise amplifier (LNA) or other downstream components for further processing and/or conditioning. In some cases, the sampling circuitry may include a number of sampling circuits each sampling a portion of a received signal. Moreover, in specific cases, each of the sampling circuits may couple to an impedance matching circuit based on an impedance of the one or more antennas. The mixer may also include various filtering circuits.