BIOIMPEDANCE MEASUREMENT CIRCUIT, METHOD AND ELECTRONIC DEVICE

Abstract

A bioimpedance measurement circuit for determining a corrected body impedance includes terminals, a control circuit, an evaluation circuit and a signal processing circuit. The control circuit controls measurement of a body impedance, where stimulus current is applied through a first and second terminal, and an input voltage is measured between a third and fourth terminal, of a first bodypart impedance, where the stimulus current is applied through the first and third terminal, and the input voltage is measured between the first and third terminal, and of a second bodypart impedance, where the stimulus current is applied through the second and fourth terminal, and the input voltage is measured between the second and fourth terminal. The signal processing circuit determines an error impedance based on the measured bodypart impedances and stored parasitic/input impedances and determines a corrected body impedance based on the measured body impedance and the error impedance.

CPC Classifications