On the effects of real time and contiguous measurement with a digital temperature and voltage sensor

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The proposed digital sensor measures both temperature and voltage simultaneously in field. The sensor is ring oscillator (RO)-based and its design is fully digital. Its measurement time is shorter than the conventional analog sensors' and it can be placed at any place such as the boundary of a CPU core, GPU core, or Memory. This paper investigates the accuracy of the sensor derived from reduction of temporal and spatial variations. The variations are evaluated by the measurement of a fabricated test chip. When the measurement time is long like the analog sensors, the variations during measurement has a great influence on sensor' accuracy. The comprehensive evaluations show that the total measurement error is smaller than the analog sensors' and it implies the importance of real time and contiguous measurement.

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