A widely linear temperature to frequency converter using athermistor in a pulse generator |
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Authors: | Sengupta RN |
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Affiliation: | Central Sci. Instrum. Org., Chandigarh; |
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Abstract: | A modification of an existing technique for thermistor linearization is presented. A temperature-measuring circuit using a thermistor in a specially designed pulse generator is used to obtain a highly linear relation between absolute temperature and frequency. The use of a general-purpose operational amplifier and two switching transistors in the design of the pulse generator provides a temperature scale that is linear over a wide range of values on a high degree of sensitivity. The result shows that an extremely high degree of linearity is achieved by this method |
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