Chip implementation with combined temperature sensor and reference devices based on DZTC principle

A CMOS temperature sensor design to improve the sensitivity and linearity of the authors´ previous work is presented. Based on the principle of double zero temperature coefficient (DZTC) points, a combined device is fabricated using 0.35 μm CMOS process with two voltage references, one current reference, and one temperature sensor. From -20 to 120°C, two voltage references provide temperature-stable outputs of 823 ± 0.2 and 1265 ± 8.9 mV, and the current reference gives 23.5 ±1.2 μA. The temperature sensor has good sensitivity of 9.55 mV/°C better than the previous design by 4.15 times, and high linearity of 97%.