Digital CMOS built-in temperature sensor

Abstract

The invention relates to a temperature sensor of a digital CMOS sheet in the field of temperature monitoring domain. It uses the linear relationship between the transistor critical voltage and the temperature to separately design two project temperature sensing circuit based on the relaxation oscillator and the Schmitt trigger. The accuracy of the two temperature sensors are below 1 degree. It adopts all CMOS structure at the same time.

Description

technical field [0001] The digital CMOS on-chip temperature sensor of the invention relates to design for thermal testing (DfTT) in integrated circuit design, on-chip real-time temperature monitoring and temperature protection. Background technique [0002] Since the successful development of integrated circuits in the 1950s, their functions and scales have developed rapidly. Over the past few decades, the integration level of integrated circuits has been increasing at the rate predicted by Moore's Law, doubling roughly every 18 months. Integrated circuits have developed from the original small-scale to today's very large-scale (VLSI) and very large-scale (ULSI) levels, and the feature size has also entered the deep submicron (DSM) and ultra-deep submicron (VDSM) stages, and can work at the level of GHz frequencies. Taking CPU manufacturer Intel as an example, the manufacturing process of its CPU has developed from 0.8 micron in the early 1990s to 0.09 micron today. [00...

AI Technical Summary

Problems solved by technology

([6]Wang Nailong, Zhang Sheng and Zhou Runde, "A novel built-in CMOS Temperature Sensor for VLSICircuits", Chinese Journal of Semiconductors, Vol 25, No.3 Mar, 2004) The sensor in [4] The synthesis of [5] consumes more transistors, and the charging current of its capacitor is affected by the power supply voltage

Images