Delay performance due to thermal variation on field-programmable gate array via the adoption of a stable ring oscillator

Jaafar, Anuar and Soin, Norhayati and Hatta, Sharifah Fatmadiana Wan Muhamad and Irwan Md, Salim Sani (2019) Delay performance due to thermal variation on field-programmable gate array via the adoption of a stable ring oscillator. IET Computers & Digital Techniques, 13 (5). pp. 405-413. ISSN 1751-8601, DOI

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Thermal issues are rapidly evolving in the field-programmable gate arrays (FPGAs) and are being intensely studied as these issues appear to significantly affect the delay performance of FGPAs. A ring oscillator has been widely used as a digital temperature sensor to sense this thermal effect on FPGAs. The delay generated by the ring oscillator will vary depending on the temperature environment due to negative bias temperature instability, hot carrier injection and electromigration. It is therefore critical to adopt an accurate ring oscillator design to effectively measure the delay in FGPAs. In this study, a digital temperature sensor with a stable ring oscillator is proposed. Measurement periods of 512 and 4096 clock cycles have been implemented and the relationship between temperature, delay and total count has been established. The results show that as the temperature increases to 100°C, the delay decreases by 3.99 and 33.98% for 512 and 4096 clock cycles, respectively. It has been found that in order to reduce the degradation effect on the Virtex-6 FPGA, adopting a measurement period of 512 clock cycles is the best method. The measured data is successfully validated through a set of simulations. Thus, it may benefit a system designer and industrial player, especially in designing temperature-based FPGAs. © The Institution of Engineering and Technology 2019

Item Type: Article
Funders: Postgraduate Research Fund (PG025-2015A), UTeM Short Term Grant (PJP/ 2019/FKEKK(2C)/S01661)
Uncontrolled Keywords: Temperature control; Temperature; Thermal sensors
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 26 Mar 2020 05:07
Last Modified: 26 Mar 2020 05:07

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