A Remote Temperature-Sensing Chip Adaptive to Parasitic and Discrete Transistors with an Inaccuracy of ±0.25 °C from −55 °C to 125 °C

This paper presents a high-precision remote temperature-sensing chip designed for advanced computing systems that require high-precision thermal management. The parasitic resistance, beta compensation, and early voltage compensation are proposed to achieve accuracy compensation of remote temperature sensing, whether using discrete transistors or parasitic transistors. The chip completed the circuit and layout design in a 0.18 μm CMOS process, with a chip area of 0.33 mm2 and a supply voltage of 1.8 V. Post-layout simulation results showed that the chip achieves a temperature-sensing accuracy of ±0.25 °C within the temperature range of −55 °C to 125 °C when adopting discrete transistors and parasitic transistors for remote temperature measurement.