公开(公告)号：US10560095B2

公开(公告)日：2020-02-11

申请号：US15987776

申请日：2018-05-23

Applicant: Analog Devices, Inc.

Inventor： Thomas G. O'Dwyer ,  Tze Lei Poo

IPC: H03K19/003 ,  H04L9/32

Abstract: According to various aspects, systems and methods for providing a soft-decoding physical unclonable function are provided. According to one embodiment, PUF circuitry includes circuit elements with impedance values that are used to generate a PUF value. For example, one or more resistors may be connected to a voltage source. The resistors may generate a resulting voltage signal that is measured and indicates a ratio of the impedance values of the resistors. Due to manufacturing variations, each impedance value may be unique, such that the impedance values may be used to provide a unique number sequence. Each ratio value may be converted into a single bit or multi-bit digital value through digitization, for example with a comparator and/or an analog to digital converter, and the series of digital values may represent or be used to generate a unique number sequence.

公开(公告)号：US11543402B2

公开(公告)日：2023-01-03

申请号：US16757202

申请日：2018-05-04

Applicant: Analog Devices, Inc.

Inventor： Thomas G. O'Dwyer ,  Gaurav Vohra ,  Xin Zhang ,  YounJae Kook ,  Isaac Chase Novet ,  Venugopal Gopinathan

IPC: G01R33/09 ,  G01N33/487 ,  G01N27/02 ,  G01N33/49 ,  G01N33/493 ,  G01N27/12 ,  G01N27/22

Abstract: An impedance measurement system for detecting an analyte in a sample is disclosed. The system includes first, second, and third electrodes, wherein at least a portion of the third electrode is positioned between the first and second electrodes, means for generating an electromagnetic field between the first and second electrodes, means for electrically controlling the third electrode, wherein the third electrode modifies the electromagnetic field, and a processor for detecting a presence of the analyte in the sample, based at least in part on a property of the electromagnetic field.

公开(公告)号：US20190363714A1

公开(公告)日：2019-11-28

申请号：US15987776

申请日：2018-05-23

Applicant: Analog Devices, Inc.

Inventor： Thomas G. O'Dwyer ,  Tze Lei Poo

IPC: H03K19/003 ,  H04L9/32

Abstract: According to various aspects, systems and methods for providing a soft-decoding physical unclonable function are provided. According to one embodiment, PUF circuitry includes circuit elements with impedance values that are used to generate a PUF value. For example, one or more resistors may be connected to a voltage source. The resistors may generate a resulting voltage signal that is measured and indicates a ratio of the impedance values of the resistors. Due to manufacturing variations, each impedance value may be unique, such that the impedance values may be used to provide a unique number sequence. Each ratio value may be converted into a single bit or multi-bit digital value through digitization, for example with a comparator and/or an analog to digital converter, and the series of digital values may represent or be used to generate a unique number sequence.