The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2020
Filed:
May. 23, 2018
Analog Devices, Inc., Norwood, MA (US);
Thomas G. O'Dwyer, Arlington, MA (US);
Tze Lei Poo, Cambridge, MA (US);
Analog Devices, Inc., Norwood, MA (US);
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.