FIELD: physics, computer engineering.
SUBSTANCE: invention relates to digital signal processing and information measuring equipment and can be used to linearise the transform function of units and systems, as well as interpolation and extrapolation of measurement results. The apparatus has an analogue-to-digital converter, an integrator, a unit for calculating sequences of quotients and differences and a unit for calculating parameters of the approximating unit, connected in series, as well as a unit for setting integration intervals, the output of which is connected to the control input of the integrator, and a threshold circuit whose input is connected to the output of the unit for calculating sequences of quotients and differences, and the output is connected to the control input of the unit for calculating sequences of quotients and differences.
EFFECT: high accuracy of approximation.
3 cl, 5 dwg
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