Comparison With Other Temperature Sensors
The proposed system is compared to other temperature sensors
in Table III. While delay-based sensors can detect timing
failures for any I − T curve and voltage- or leakage-based sensors
can detect overheating for any I − T curve, the proposed
sensor system is able to detect both overheating and timing
failures for any I − T curve. As shown in Fig. 2, the additional
functionality comes at the cost of ∼ 6× area and ∼ 2× power
overhead from the delay-tracking sensor and comparison logic
(assuming the reference sensor consumes similar power to the
delay-tracking sensor); however, as shown in Table III, the total
area and energy values are similar to other sensor designs.
With a linear scaling coefficient, the proposed system occupies
the smallest area after the leakage current-based sensor, with
energy dissipation of a fraction of the voltage-based sensors.
The new functionality and competitive performance make the
proposed system a useful addition for reliable designs.
Comparison With Other Temperature SensorsThe proposed system is compared to other temperature sensorsin Table III. While delay-based sensors can detect timingfailures for any I − T curve and voltage- or leakage-based sensorscan detect overheating for any I − T curve, the proposedsensor system is able to detect both overheating and timingfailures for any I − T curve. As shown in Fig. 2, the additionalfunctionality comes at the cost of ∼ 6× area and ∼ 2× poweroverhead from the delay-tracking sensor and comparison logic(assuming the reference sensor consumes similar power to thedelay-tracking sensor); however, as shown in Table III, the totalarea and energy values are similar to other sensor designs.With a linear scaling coefficient, the proposed system occupiesthe smallest area after the leakage current-based sensor, withenergy dissipation of a fraction of the voltage-based sensors.The new functionality and competitive performance make theproposed system a useful addition for reliable designs.
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