A linear temperature-to-frequency converter using a thermistor
- 1 December 1981
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. IM-30 (4) , 296-299
- https://doi.org/10.1109/TIM.1981.6312414
Abstract
A novel technique for output frequency linearization of a thermistor-astable multivibrator is presented. An analytical expression for the linearity condition is obtained and demonstrated experimentally. The astable multivibrator incorporating this technique is shown to offer an approximately linear temperature-to-frequency conversion in the range 0 to 86°C with a sensitivity of 21 Hz/°C. The experimental circuit exhibits excellent thermal stability for ambient temperature variations. The technique can also be used successfully in the lower temperature range -50 to 0°C.Keywords
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