CMOS Based Temperature Sensing Via Change in Threshold Voltage

The design and simulation of MOS-based temperature sensors in the 65nm technology node using Cadence Virtuoso are shown in this work. By running MOSFETs in the sub-threshold range, the sensors exhibited extremely low power consumption. A diode-connected NMOS is used as the sensing element, and an interfacing circuit is used for signal conditioning and amplification. The sensor operates at 1.2 V supply voltage, uses just 96 μW of power, and has sensitivity of 0.177 mV/°C. The sensing temperature range of the sensor is between -50°C and 200°C.