公开(公告)号：US20240204510A1

公开(公告)日：2024-06-20

申请号：US18084068

申请日：2022-12-19

申请人： Rosemount Inc.

发明人： Yevgeny Yurevich Korolev ,  William Michael Mansfield ,  Xiong Gao

IPC分类号： H02H9/02

CPC分类号： H02H9/02

摘要： A current limiting circuit for limiting a current through a pair of terminals powered from a 2-wire Advanced Physical Layer (APL) spur includes a current source, a first current limiter and a second current limiter. The current source is connected to one of the terminals and is configured to source a current that is conducted through the terminals and has an amplitude that is at a current source threshold. The first current limiter is connected to the current source and is configured to limit the amplitude below a first threshold. The second current limiter is connected to the first current limiter and is configured to limit the amplitude below a second threshold.