Modeling of negative resistance for resistive transducers linearisation

The aim of the research is to develop the precision measuring converter for resistive transducers having nonlinear characteristic of conversion. It reviews the example of measuring converter creation for narrow-limited (about 20 K) thermometers with application of standard platinum resistance thermal converter (RTC) in the capacity of the transducer when the linearization problem of conversion characteristic arises. In this work the linearization is realized by means of negative resistance modeling by positive feedback introduction. The questions of stability are reviewed; also done is the estimation of initial and residual nonlinearities for the purpose of determining the achievable precision of temperature narrow limits measurement in working conditions.