CMOS design of 5-stage ring oscillator as temperature sensor

Abstract

Ring oscillator is versatile devise based on CMOS designed for temperature sensor to replace the conventional temperature sensor for optimized the application specific circuits which are vulnerable in temperature variations. Sensors like RTD, Thermocouple, Therimoristor and IC are often used within electronic systems to monitor temperature and provide protection from excessive temperature excursions which are bulkier, costly, complicated interface circuit, and un precise signal conditioning. We tried to implement integrated temperature sensor within the Die therein we may estimate and control the Temperature with Ring oscillator. Proposed Ring Oscillator gives frequency of 1–3.12 GHz, with tuning range of approximately 81% and Power consumptions of around 0.054mW.