Patent ID: 8755868
Filing Date: 2014-06-17
Classification: A61B

Abstract:
1. A method for adaptively sampling an analogue biopotential signal, the method comprising the steps of: a) determining a derivative of the analogue biopotential signal; b) detecting a change in the derivative of the analogue biopotential signal; c) sampling the analogue biopotential signal using a sampling frequency; and d) using the change in the derivative of the analogue biopotential signal to control the sampling frequency of the analogue biopotential signal, wherein the process of controlling the sampling frequency of the analogue biopotential signal comprises comparing the change in the derivative of the analogue biopotential signal with an automatically controlled threshold value, and wherein the automatically controlled threshold value is generated from an expected average activity value and an extracted average activity value, the extracted average activity value being derived from the analogue biopotential signal, and the expected average activity value being derived from a beat frequency of the analogue biopotential signal.