Exploration of ring oscillator design space for temperature measurements on FPGAs

Ruething, Christoph; Agne, Andreas; Happe, Markus; Plessl, Christian

doi:10.1109/fpl.2012.6339370

Cited by 23 publications

(9 citation statements)

References 8 publications

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“…As expected, the output of the counter (representing the frequency) decreased with the temperature. Despite the non-linearity of the curve owing to the low core voltage of the Zynq used (1 V) [8,12], this result is in line with [3]. The SRO calibration curve can be exploited with a polynomial approximation.…”

Section: Resultsmentioning

confidence: 57%

“…where N is the number of gates and t is the propagation delay of a single gate. This type of oscillator is sensible to physicals parameters including temperature, as widely proved in past publications [2,3] and more theoretically deepen in [4]. The variations of the frequency Fig.…”

Section: Ring Oscillatorsmentioning

confidence: 53%

“…The number of available contributions [1][2][3][4]6,[8][9][10] makes digital thermal sensors for FPGAs a hot topic. The main advantage over integrated analog sensor has been identified as the possibility of reconfiguration.…”

Section: Introductionmentioning

confidence: 99%

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Implementation of a fast relative digital temperature sensor to achieve thermal protection in Zynq SoC technology

Lefebvre

Montero

Rubio

2017

Microelectronics Reliability

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More and more industrial embedded systems are developed to undergo hard environmental conditions, especially high temperatures. To prevent this impact, environmental conditions (e.g. the temperature) could be monitored. Plenty of new industrial designs are built around SoCs, and more especially around the Zynq-7000 introduced by Xilinx in 2011. In fact, monitoring the temperature inside the Zynq has become a challenge. While many applications focused on precision, the application proposed here instead is in an industrial context and aims at detecting a temperature excess as fast as possible to achieve the thermal protection of a logic area of the chip. Most of the digital sensors designed require a calibration to be operational. Such a process is not viable for time to market, and a solution must be found to either lighten it (e.g. by doing a simple 3-points calibration) or simply avoiding it. Instead of measuring the temperature in an absolute way, this paper focuses on detecting if the temperature is above or below a threshold. This work exhibits the implementation of three temperature digital sensors with promising results on Zynq technology. Two of the presented sensors are based on a ring-oscillator and another uses a flip-flop as a sensing element. Results show that a temperature increase can be detected in less than 1ms without any calibration protocol and this sensor was found to perfectly fit the targeted application.

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Section: Resultsmentioning

confidence: 57%

Section: Ring Oscillatorsmentioning

confidence: 53%

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Implementation of a fast relative digital temperature sensor to achieve thermal protection in Zynq SoC technology

Lefebvre

Montero

Rubio

2017

Microelectronics Reliability

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“…In this ring oscillator, the output of each inverter is used as input for the next one and the last output is fed back to the input of the first inverter. Ring oscillator is commonly used in the process technology development to characterize the process performance [6], [8], [13], [14]. It also widely uses as clock generator, voltage controlled oscillator [15]- [18] and phase locked loop [19], [20].…”

Section: Basic Concept Of Ring Oscillatormentioning

confidence: 99%

“…Ring oscillator is widely used in the communication system design especially in the wireless ssystem [1]- [5] and FPGA application [6], [7] because of its wide tuning range, making them more robust over process and temperature variations. It also use used to study the degradation of logic CMOS circuit [8], [9].…”

Section: Introductionmentioning

confidence: 99%

CMOS ring oscillator delay cell performance: a comparative study

Hadi¹,

Jidin²,

Wahab³

et al. 2019

IJECE

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A common voltage-controlled oscillator (VCO) architecture used in the phase locked loop (PLL) is the ring oscillator (RO). RO consist of number of inverters cascaded together as the input of the first stage connected to the output of the last stage. It is important to design the RO to be work at desired frequency depend on application with low power consumption. This paper presents a review the performance evaluation of different delay cell topologies the implemented in the ring oscillator. The various topologies analyzed includes current starved delay cell, differential delay cell and current follower cell. Performance evaluation includes frequency range, frequency stability, phase noise and power consumption had been reviewed and comparison of different topologies has been discussed. It is observed that starved current delay cell have lower power consumption and the different of the frequency range is small as compared to other type of delay cell.

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Calibration of RO-based temperature sensors for a toolset for measuring thermal behavior of FPGA devices

Weber

Zagrabski

Wojciechowski

et al. 2014

Microelectronics Journal

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Exploration of ring oscillator design space for temperature measurements on FPGAs

Cited by 23 publications

References 8 publications

Implementation of a fast relative digital temperature sensor to achieve thermal protection in Zynq SoC technology

Implementation of a fast relative digital temperature sensor to achieve thermal protection in Zynq SoC technology

CMOS ring oscillator delay cell performance: a comparative study

Calibration of RO-based temperature sensors for a toolset for measuring thermal behavior of FPGA devices

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