公开(公告)号：US20230082905A1

公开(公告)日：2023-03-16

申请号：US17800290

申请日：2021-02-15

Applicant: STMicroelectronics International N.V.

Inventor： Herve Guegnaud ,  Stephanie Venec ,  Guillaume Blamon

IPC: H03F1/52 ,  H03F3/24

Abstract: According to one aspect, an integrated circuit includes a power amplifier having a succession of at least two amplifier stages. The two amplifier stages include a first amplifier stage configured to receive a radio frequency signal as input and a last amplifier stage configured to deliver as an output of an amplified radio frequency signal. The power amplifier further includes a safety circuit with a control circuit configured to compare the amplified radio frequency signal voltage with a threshold voltage. The safety circuit further comprises a gain reduction circuit configured to reduce a bias voltage of an upstream amplifier stage of the last amplifier stage when the amplified radio frequency signal voltage is greater than the threshold voltage.