Piecewise Continuous Test Signals in Measuring Circuits with Time Division Multiplexing

Abstract

An output signal of an active transducer which carries out conversion of a passive electrical quantity into an active one is, as a rule, an analog quantity in measuring circuits of sensors. There is a need for sampling and analog-to-digital conversion of the output voltage of the active transducer in order to generate the output signal of the measuring circuit using digital nodes. Since sampling is carried out over some period of time, rather than instantly, during which the analog signal manages to change, this leads to the appearance of an instrumental error due to imperfection of sampling. To eliminate the indicated error, it is proposed to use piecewise continuous test signals in measuring circuits of sensors, which provide invariability of the output voltage of the active transducer during sampling time. Variants for mathematical description of functions of piecewise continuous test signals are considered, and their comparative analysis is carried out.