HIGH-PRECISION TEMPERATURE-TO-DIGITAL CONVERTER WITH LOW POWER CONSUMPTION

摘要

The invention relates to a high-precision temperature-to-digital converter with low power consumption. The power is obtained from wireless waves. The invention also relates to a method for measuring the temperature associated with the converter. The converter comprises a thermistor RTH (1510), the resistance of which depends on the temperature; a resistor RP (1530), a resistor RS (1520), and an integration capacitor CINT (1540) which are temperature invariable; and a reading and conversion circuit (1300) that measures the resistance of the thermistor and converts said value representative of the temperature into a digital code for subsequent processing. The method comprises fours steps such that the resistance of the RTH thermistor is proportional to an expression dependent on the temperature NTEMP.