Patent ID: 9326733
Filing Date: 2016-05-03
CPC Classification: A61B

Claim Text:
1. A biopotential signal acquisition system comprising: an analogue readout unit configured to receive an analogue biopotential signal and to extract an analogue measured biopotential signal and an analogue reference signal; a Sigma-Delta ADC unit configured to provide a digital measured biopotential signal from the analogue measured biopotential signal and a digital reference signal from the analogue reference signal; a first digital filter unit connected to an output of the Sigma-Delta ADC, and including a cascaded integrator-comb filter and a halfband decimation filter connected to the cascaded integrator-comb filter, wherein the first digital filter unit is configured to provide a first digital filtered version of the digital measured biopotential signal and the digital reference signal at an output of the cascaded integrator-comb filter, and a second digital filtered version of the digital measured biopotential signal and the digital reference signal at an output of the first digital filter unit; and a second digital filter unit connected to the output of the cascaded integrator-comb filter of the first digital filter unit, and configured to calculate a digital motion artifact estimate based on the first digital filtered version of the digital measured biopotential signal and the digital reference signal.