CPC A61B 5/308 (2021.01) [A61B 5/0531 (2013.01); A61B 5/28 (2021.01); A61B 5/318 (2021.01); A61B 5/721 (2013.01); A61B 2560/02 (2013.01)] | 10 Claims |
1. A circuitry of a biopotential acquisition system, comprising:
an input node, wherein the input node is coupled to an electrode of the biopotential acquisition system, and the electrode is configured to be in contact with a human body;
an electrode-tissue impedance (ETI) transmitter, configured to generate a transmitter signal to the input node;
an analog front-end circuit, coupled to the input node, configured to process an input signal from the input node to generate a digital signal, wherein each of the input signal and the digital signal comprises components of an electrocardiography (ECG) signal and an ETI signal;
a digital filter, configured to filter the digital signal to generate the ECG signal; and
a digital mixer, configured to mix the digital signal with mixer data to generate an in-phase mixed signal and a quadrature mixed signal, wherein the mixer data corresponds to a frequency of the transmitter signal, and the in-phase mixed signal and the quadrature mixed signal comprise the components of the ETI signal.
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