Источник Тока С Компенсацией Падения Выходного Сопротивления Для Электроимпедансной Томографии

Abstract

The article considers a current source for the electrical impedance tomography with compensation in output resistance drop, its block diagram being shown, and its hardware implementation being described. It also presents a technique for assessing the stability of the current source output parameters, a comparison of current sources with and without compensation for the drop in output resistance and amplitude, respectively, has been carried out. It is con-cluded that for a given amplitude of the output current in a given range of frequencies and resistances, a current source with an output resistance drop compensation circuit has an error an order of magnitude smaller than a traditional current source with the same circuitry, and this will positively affect the metrological characteristics of the en-tire electrical impedance tomography device.