A Supply-Noise-Tolerant CMOS Temperature Sensor With Subthreshold Sensing And Current-Mode SAR Readout
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Kidambi, Narasimha Vasishta
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Abstract
A Supply-Noise tolerant CMOS Temperature Sensor with Subthreshold sensing and Current Mode SAR readout is presented. The design uses a CMOS bias circuit to generate a temperature-independent current and a PTAT current that rises with temperature. A current-comparator-based SAR ADC compares these currents, producing a 5-bit digital code that varies linearly from -25 °C to 100 °C. The sensor occupies ~2000 µm², shows strong immunity to supply noise. The design in taped out in 28 nm CMOS.
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2024-12
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Thesis (Masters Degree)