Oscillator-based temperature sensor and sensor assembly

Abstract

The application provides an oscillator-based temperature sensor and a sensor assembly. The temperature sensor comprises: a first oscillator generating a first clock signal of a first frequency, an absolute value of a temperature coefficient of the first clock signal being greater than or equal to a first predetermined value; a second oscillator generating a second clock signal of a second frequency, the second frequency being higher than the first frequency, an absolute value of a temperature coefficient of the second clock signal being less than a second predetermined value; a counting and control unit timing based on the first clock signal to obtain a predetermined time length; a counter counting the second clock signal to obtain and output a count value within the predetermined time length; and a calculation unit calculating a current digital temperature value according to a calibration count value output by the counter at a predetermined calibration temperature, a measurement count value output at a current temperature, and a linearly fitted temperature coefficient.

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