Design and automatic generation of area-efficient ring oscillator based addressable test chips

2017 ◽  
Author(s):  
Xiaoxin Dou ◽  
Weiwei Pan ◽  
Zheng Shi ◽  
Yongjun Zheng
Keyword(s):  
Automatic Generation ◽  
Ring Oscillator ◽  
Test Chips ◽  
Area Efficient

БЛОКИ КОЛЬЦЕВЫХ ГЕНЕРАТОРОВ ДЛЯ ИССЛЕДОВАНИЯ РАДИАЦИОННЫХ ПАРАМЕТРОВ И АТТЕСТАЦИИ БИБЛИОТЕК ЭЛЕМЕНТОВ НАНОМЕТРОВЫХ КМОП СБИС СНК

2020 ◽  
Vol 96 (3s) ◽  
pp. 229-236
Author(s):  
Ю.М. Герасимов ◽  
Н.Г. Григорьев ◽  
А.В. Кобыляцкий ◽  
Я.Я. Петричкович ◽  
Д.К. Сергеев
Keyword(s):  
Experimental Methods ◽  
Radiation Hardness ◽  
Ring Oscillator ◽  
Heavy Particles ◽  
Test Chips

Разработан набор блоков кольцевых генераторов (КГ) в составе тестовых кристаллов (ТК) для расчетно-экспериментальной оценки радиационной стойкости нанометровых (суб-100 нм) КМОП СБИС типа «система на кристалле» (СнК). Показано, что результаты исследования КГ позволяют расчетно-экспериментальными методами прогнозировать радиационную стойкость СБИС, в частности, при воздействии отдельных ядерных частиц (ОЯЧ). A set of ring oscillator (RO) blocks has been designed and implemented in test chips for further experiment-based SoC radiation hardness calculation. It has been shown that the results of the RO tests allow using experimental methods to predict SoC radiation hardness, in particular, on exposure to heavy particles.

Area-Efficient PUF-Based Key Generation on System-on-Chips with FPGAs

2015 ◽  
Vol 25 (01) ◽  
pp. 1640002 ◽  
Author(s):  
Stefan Gehrer ◽  
Georg Sigl
Keyword(s):  
Ring Oscillator ◽  
Key Generation ◽  
Partial Reconfiguration ◽  
Physically Unclonable Functions ◽  
System Part ◽  
Cryptographic Key ◽  
Response Vector ◽  
Multiple Ring ◽  
Area Efficient ◽  
Logic Blocks

Physically unclonable functions (PUFs) are an innovative way to generate device unique keys using uncontrollable production tolerances. In this work, we present a method to use PUFs on modern FPGA-based system-on-chips (SoCs). The processor system part of the SoC is used to configure the FPGA part. We propose a reconfigurable PUF design that can be changed by using the partial reconfiguration (PR) feature of modern FPGAs. Multiple ring oscillator PUF (RO PUF) designs are loaded on the same logic blocks of the FPGA in order to make use of different resources, i.e., sources of entropy, on the FPGA. Their frequencies are read out individually and the differences between neighbored oscillators are used to generate a bit response. The responses of each design can be concatenated to a larger response vector that can be used to generate a cryptographic key. We present an implementation that is able to decrease the needed resources by 87.5% on a Xilinx Zynq.

The Role of Visual Distractors in the Simon Effect

2017 ◽  
Vol 64 (6) ◽  
pp. 387-397 ◽  
Author(s):  
Luisa Lugli ◽  
Stefania D’Ascenzo ◽  
Roberto Nicoletti ◽  
Carlo Umiltà
Keyword(s):  
Simon Effect ◽  
Simon Task ◽  
Automatic Generation ◽  
Spatial Code ◽  
Attentional Model ◽  
Previous Evidence ◽  
Spatial Stimulus ◽  
Attentional Resources ◽  
Code Changes

Abstract. The Simon effect lies on the automatic generation of a stimulus spatial code, which, however, is not relevant for performing the task. Results typically show faster performance when stimulus and response locations correspond, rather than when they do not. Considering reaction time distributions, two types of Simon effect have been individuated, which are thought to depend on different mechanisms: visuomotor activation versus cognitive translation of spatial codes. The present study aimed to investigate whether the presence of a distractor, which affects the allocation of attentional resources and, thus, the time needed to generate the spatial code, changes the nature of the Simon effect. In four experiments, we manipulated the presence and the characteristics of the distractor. Findings extend previous evidence regarding the distinction between visuomotor activation and cognitive translation of spatial stimulus codes in a Simon task. They are discussed with reference to the attentional model of the Simon effect.

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