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Low-Power Wide-Range Frequency-Output Temperature Sensor

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4 Author(s)
Azcona, C. ; Electron. Design Group-I3A, Univ. of Zaragoza, Zaragoza, Spain ; Calvo, B. ; Medrano, N. ; Celma, S.

This paper presents a simple but effective linear frequency output temperature sensor based on a multivibrator current-to-frequency converter. Post-layout simulation results for a 1.2 V 0.18- μm CMOS design show high linearity over a temperature range from -40°C to +120°C, with an accuracy of ±1°C, a sensitivity of 354 Hz/°C and only 3 μW of power consumption, which makes the design suitable for portable systems.

Published in:

Sensors Journal, IEEE  (Volume:14 ,  Issue: 5 )