公开(公告)号：US20220239267A1

公开(公告)日：2022-07-28

申请号：US17158213

申请日：2021-01-26

Applicant: Infineon Technologies AG

Inventor： Christoph SCHROERS ,  Carlos Humberto GARCIA ROJAS ,  Elisa SANFILIPPO ,  Veikko SUMMA

IPC: H03G3/30 ,  H03F3/04 ,  H03K5/24

Abstract: A gray zone prevention circuit includes: a first gain stage circuit including a first input terminal and a first output terminal, the first gain stage circuit amplifies a feedback signal received at the first input terminal and generates an amplified signal at the first output terminal; a second gain stage circuit including a terminal that is coupled to the first output terminal for receiving the amplified signal and a second output terminal, where the second gain stage circuit is configured to generate a monitored signal based on the amplified signal; a feedback circuit coupled between the second output terminal and the first input terminal and configured to convert the monitored signal into the feedback signal; and a comparator circuit including a monitoring node coupled to the first output terminal for receiving the amplified signal, wherein the comparator circuit is configured to monitor the monitored signal indirectly via the amplified signal.