This paper presents the design of the temperature sensor and analysis of different calibration methods. The main aspect of the analysis was optimization of the number and location of the measurement points needed to perform the calibration for a given accuracy. For this purpose, temperature sensors using proportional to the absolute temperature (PTAT) current and current controlled oscillator (CCO) have been designed in 180 nm technology. To reduce the sensitivity of the sensor to the supply voltage, the low dropout regulator (LDO) has been used. The bandgap circuit generates the stable reference voltage for the LDO and PTAT current for the CCO
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