Title :
Linearizing transducer characteristics
Author :
Patranabis, D. ; Ghosh, Sudip ; Bakshi, C.
Author_Institution :
Dept. of Electron. & Telecommun. Eng., Jadavpur Univ., Calcutta, India
fDate :
3/1/1988 12:00:00 AM
Abstract :
Most of the practical transducers fall into two categories regarding their input-output characteristics: type I, with a characteristic that is exponentially rising, and type II, with a characteristic that is exponentially decaying. While type I is easily linearized using a logarithmic converter, type II needs additional inversion means for the purpose of linearization. A technique for linearizing type-II transducer characteristic using a log-converter and a FET is presented, and its performance is compared with that of a simple single-stroke digital technique. Examples and experimental results are presented and discussed
Keywords :
convertors; field effect transistor circuits; linearisation techniques; transducers; FET; exponentially decaying characteristic; input-output characteristics; linearisation; log-converter; logarithmic converter; temperature to voltage converter; thermistor coupled log amplifier; type-II transducer characteristic; Analog circuits; Application software; Computer applications; FETs; Hardware; Moisture; Sensor phenomena and characterization; Software packages; Thermal sensors; Transducers;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
