Title :
A widely linear temperature to frequency converter using a thermistor in a pulse generator
Author_Institution :
Central Sci. Instrum. Org., Chandigarh, India
fDate :
3/1/1988 12:00:00 AM
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
Keywords :
convertors; linearisation techniques; pulse generators; temperature measurement; thermistors; general-purpose operational amplifier; linear temperature to frequency converter; linearization; pulse generator; square wave generator; switching transistors; temperature-measuring circuit; thermistor; Bridge circuits; Frequency conversion; Frequency measurement; Linearity; Operational amplifiers; Pulse generation; Temperature distribution; Temperature sensors; Thermistors; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
