公开(公告)号：US20210240445A1

公开(公告)日：2021-08-05

申请号：US16776909

申请日：2020-01-30

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Hemant M. Dixit ,  Julien Frougier ,  Bipul C. Paul ,  William J. Taylor, JR.

IPC: G06F7/58 ,  G11C11/16

Abstract: Embodiments of the disclosure provide a system for providing a true random number (TRN) or physically unclonable function (PUF), including: an array of voltage controlled magnetic anisotropy (VCMA) cells; a voltage pulse tuning circuit for generating and applying a stochastically tuned voltage pulse to the VCMA cells in the array of VCMA cells, wherein the stochastically tuned voltage pulse has a magnitude and duration that provides a 50%-50% switching distribution of the VCMA cells in the array of VCMA cells; and a bit output system for reading a state of each of the VCMA cells in the array of VCMA cells to provide a TRN or PUF.

公开(公告)号：US11719773B2

公开(公告)日：2023-08-08

申请号：US17375166

申请日：2021-07-14

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Hemant M. Dixit ,  Vinayak Bharat Naik ,  Kazutaka Yamane ,  Eng Huat Toh

IPC: G01R33/09 ,  G01R33/00

CPC classification number: G01R33/098 ,  G01R33/0005 ,  G01R33/093

Abstract: A magnetic field sensor may include a plurality of MTJ elements. Each MTJ element of has a state indicated by a magnetic moment direction of a sensing layer relative to a pinned, reference layer in an absence of an external magnetic field. The plurality of MTJ elements are arranged into two identical sets of at least two MTJ elements, where each MTJ element in each respective set has a different state. The states of the MTJ elements are arranged in a manner to measure the external magnetic field regardless of the direction of the external magnetic field. The MTJ elements include identical layers, and are electrically serially connected.

公开(公告)号：US20230014455A1

公开(公告)日：2023-01-19

申请号：US17375166

申请日：2021-07-14

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Hemant M. Dixit ,  Vinayak Bharat Naik ,  Kazutaka Yamane ,  Eng Huat Toh

IPC: G01R33/09 ,  G01R33/00

Abstract: A magnetic field sensor may include a plurality of MTJ elements. Each MTJ element of has a state indicated by a magnetic moment direction of a sensing layer relative to a pinned, reference layer in an absence of an external magnetic field. The plurality of MTJ elements are arranged into two identical sets of at least two MTJ elements, where each MTJ element in each respective set has a different state. The states of the MTJ elements are arranged in a manner to measure the external magnetic field regardless of the direction of the external magnetic field. The MTJ elements include identical layers, and are electrically serially connected.

公开(公告)号：US11435982B2

公开(公告)日：2022-09-06

申请号：US16776909

申请日：2020-01-30

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Hemant M. Dixit ,  Julien Frougier ,  Bipul C. Paul ,  William J. Taylor, Jr.

IPC: G06F7/58 ,  G11C11/16

Abstract: Embodiments of the disclosure provide a system for providing a true random number (TRN) or physically unclonable function (PUF), including: an array of voltage controlled magnetic anisotropy (VCMA) cells; a voltage pulse tuning circuit for generating and applying a stochastically tuned voltage pulse to the VCMA cells in the array of VCMA cells, wherein the stochastically tuned voltage pulse has a magnitude and duration that provides a 50%-50% switching distribution of the VCMA cells in the array of VCMA cells; and a bit output system for reading a state of each of the VCMA cells in the array of VCMA cells to provide a TRN or PUF.