IEEE Solid-State Circuits Letters · 2023 · 11 citations · 9 references
EngineeringComputer EngineeringElectrical EngineeringLow-power DesignMicroelectronicsSensorsCmos Circuit DesignLow-power Digital Circuit DesignSensor CalibrationTemperature MeasurementTemperature SensorsThermal SensorsComparator DesignDigital FilteringEnergy ConsumptionInput Offset VoltageOffset VoltageTemperature SensingTemperature Sensor AccuracyTemperature Transduction
This letter presents a SAR temperature sensor using a clocked temperature-voltage comparator. The clocked comparator is designed to have a PTAT input offset voltage, which is quantized by SAR. Temperature transduction is spatially and temporally confined in the comparatorfs dynamic comparison. Other circuit operations are robust to the temperature changes so that the sensorfs measurement range can be maximized. Also, the sensor inherits many good aspects of a SAR ADC, such as simple design and operation, no need for complex digital filtering, and low energy consumption. As a result, the test chip fabricated in a 0.18 μm CMOS process shows a wide temperature sensing range of.50 to +130 ∘C, with a low energy consumption of 38.69 pJ/conv. After two-point calibration, the temperature sensor shows a 3-sigma temperature inaccuracy of.2.54/+2.16 ∘C.
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Michiel A. P. Pertijs, A. Niederkorn, Xu Ma et al. · IEEE Journal of Solid-State Circuits · 2005 · 365 citations
Engineering, Computer Engineering, Electrical Engineering +17