Bio-impedance measurement device and bio-impedance measurement method

A bio-impedance measurement device, comprising:

• a signal generator, configured to input a probing signal having a first frequency and an over-sampling pattern into a bio-impedance, wherein the probing signal comprises an oversampled current waveform including a plurality of sub-period current levels within one period of the first frequency, and wherein the oversampled current waveform is configured to reduce at least one odd-order harmonic component of a response signal associated with the probing signal;
• a receiver, configured to receive a first response signal related to the probing signal from the bio-impedance;
• a demodulation circuit, coupled to the receiver, configured to generate a first in-phase signal and a first quadrature-phase signal according to the first response signal;
• and
• a processor, coupled to the signal generator and the demodulation circuit, configured to analyze the probing signal, the first in-phase signal and the first quadrature-phase signal to determine a bio-impedance value of the bio-impedance.