公开(公告)号：US20230146920A1

公开(公告)日：2023-05-11

申请号：US17979246

申请日：2022-11-02

Applicant: NVIDIA CORPORATION

Inventor： Bonita Bhaskaran ,  Nithin Valentine ,  Shantanu Sarangi ,  Mahmut Yilmaz ,  Suhas Satheesh ,  Charlie Hwang ,  Tezaswi Raja ,  Kevin Zhou ,  Sailendra Chadalavada ,  Kevin Ye ,  Seyed Nima Mozaffari Mojaveri ,  Kerwin Fu

IPC: G01R31/317 ,  G01R29/26 ,  G01R31/3177

CPC classification number: G01R31/31708 ,  G01R31/31727 ,  G01R29/26 ,  G01R31/31725 ,  G01R31/3177 ,  G01R31/31905

Abstract: Introduced herein is a technique that reliably measures on-die noise of logic in a chip. The introduced technique places a noise measurement system in partitions of the chip that are expected to cause the most noise. The introduced technique utilizes a continuous free-running clock that feeds functional frequency to the noise measurement circuit throughout the noise measurement scan test. This allows the noise measurement circuit to measure the voltage noise of the logic during a shift phase, which was not possible in the conventional noise measurement method. Also, by being able to measure the voltage noise during a shift phase and hence in both phases of the scan test, the introduced technique can perform a more comprehensive noise measurement not only during ATE testing but as part of IST in the field.