ANALISIS RANGKAIAN PENGKONDISI SINYAL TAHAP AWAL PADA SENSOR PASIF : STUDI KASUS UNTUK THERMISTOR TIPE NTC

Warsito Warsito

Abstract


This paper describes a signal conditioning analysis of different circuits designed for thermistor NTC sensor.
The initial signal conditioning circuit is the important key in sensor application system, especially for
linearization response of sensors. Thermistors are classified as high sensitivity temperature sensors, however
their responses are not linear. This problem gives a consequence to the circuit designer to choose the signal
conditioning in order to have linear responds. The non linear gradient response for NTC thermistor sample is
122,33 0,35T 3,39*T 2 dT
dR = - + - (KOhm/K), and by the use of a parallel resistor, it becomes » -2,43 dT
dR
(Kohm/K). By applying a Wheatstone circuit, the linear response is directly in voltage response, it’s
dT » -0,0199
dV (Volt/K).
Keywords: NTC thermistor, signal conditioning, sensor

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