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US 2019/0199329 A1Published application
Ring oscillator temperature sensor
AssigneeBar-Ilan University
InventorsJoseph Shor, Natan Vinshtok-Melnik
Life of this patent
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Abstract
A sensor circuit includes at least one ring oscillator having a supply port supplied by at least one current source and a reference frequency. A comparator compares a frequency output of the at least one ring oscillator with the reference frequency to yield a measurement, such as a temperature measurement.
Claims16
A sensor circuit comprising:
- a first ring oscillator and a second ring oscillator, and a feedback loop coupled to said first and second ring oscillators such that currents in said first and second ring oscillators are equal or scaled and are determined by said feedback loop.
A sensor circuit comprising a first ring oscillator and a second ring oscillator wherein a current density of said second ring oscillator is a scaled multiple of a current density of said first ring oscillator.
Dependencies are inferred from the claim text.