Performance evaluation metrics for ring-oscillator-based temperature sensors on FPGAs: A quality factor

Exploration of ring oscillator based temperature sensors network accuracy on FPGA

“…Note that, the researchers usually use different types of counters, i.e., binary counter and residue number system (RNS) ring counter. The RNS ring counter is utilized by [7,15], in order to make the sensor more compact. Also, the researchers design various sensors using different RO configurations.…”

“…In [11], the authors design a novel intra-chip physical sensor that relies on the setup and hold time conditions of a flip-flop on the Altera Cyclone Π. The researchers in [15] introduce a fully digital temperature sensor that occupies 37.5% fewer resources compared to other compact design (i.e. [7]) and obtains 2.72 times more sensitivity.…”

“…Then, the sensors and the heat generators are activated for tm seconds. In this case the temperature after tm seconds is called Twithnet [15]. The thermal overhead TOH is calculated as in (2):…”

“…In the last years, the designers have paid a lot of attention to soft sensors. They have proposed different designs for soft sensors [5][6][7][8][9][10][11][12][13][14][15][16][17]. Some researchers utilize an array of temperature sensors based on a ring oscillator (RO).…”

Simulation and FPGA Implementation of a Ring Oscillator Sensor for Complex System Design

“…In this paper in particular, the sensor used allows the detection of thermal peaks. The interests of a sensor based on this method are multiple [10] and [11]. Among the interests of the use of this sensor based on ring oscillator method, is that it can be easily integrated on a chip and can be dynamically inserted or removed from the design at any time due to its small size.…”