DEVICE CONVERTING NONELECTRIC VALUE TO ELECTRIC SIGNAL Russian patent published in 1997 - IPC

FIELD: conversion of nonelectric values to electric signals. SUBSTANCE: device incorporates current source, correction unit, unit converting impedance to output signal which output is connected to loading resistor, is fitted with stabilizer of supply and reference voltage forming together with current source power supply unit, scaling amplifier which differential inputs are connected to measurement diagonal of measurement bridge, with independent regulated and scaling channel of correction of temperature error of "zero" composed of summing unit which input is connected to output of scaling amplifier and correction unit of temperature error of "zero", commutator of measurement limits, independent regulated and scaling channel of correction of temperature error of "range" composed of multiplication bridge which output is connected to input of unit converting impedance to output signal and correction unit of error of "range" which output is connected to second input of unit converting impedance. Commutator of measurement limits is placed between output of correction unit and input of multiplication bridge. Correction unit is manufactured in the form of unit of correction of static nonlinearity of measurement bridge which input is connected to output of summing unit. Output of reference voltage of power supply unit is connected to input of reference voltage of correction units of temperature errors of "zero" and "ranger", summing unit, correction unit and unit converting impedance. Current source of power supply unit is connected to information input of correction unit of temperature error of "zero" and to diagonal of measurement bridge made temperature-independent. Second input of multiplication bridge is connected to information input of correction unit of temperature error of "range". Multiplication bridge is fabricated in the form of resistive bridge with four arms (at least one arm has temperature-dependent resistor) and differential amplifier connected with input into measurement diagonal of resistive bridge. Output of amplifier is second output of multiplication bridge. Dower supply diagonal of resistive bridge is placed between input and first output of multiplication bridge. EFFECT: increased operational stability and reliability of device. 12 dwg