Precision Temperature Sensors in CMOS Technology

Author: M. Pertijs, Delft University of Technology, The Netherlands

Advisor: Prof. J.H. Huijsing

Defense: 28/11/2005

Abstract:

This thesis describes the analysis and design of  precision temperature sensors in CMOS technology. It focuses on so-called 'smart' temperature sensors, which provide a readily interpretable digital output. Over the military temperature range, which extends from - 55 ⁰C to  + 125 ⁰C, the inaccuracy obtainede using such sensors in previous work was about +-2 ⁰C. In this work, that inaccuracy is reduced to +-0.1  ⁰C, so that the performance of CMOS temperature sensors becomes comparable to that of conventional sensors such as platinum resistors and thermistors. To keep productions costs low, a standard CMOS process is used, and the sensors are calibrated at only one temperature.

Identifiers: CMOS temperature sensors, analog-to-digital converter (ADC), smart temperature sensors