Patent ID: 6546361
Filing Date: 2003-04-08
Classification: H03H

Abstract:
A method for removing the bipolar bias level from a periodic time varying signal and recording the level thereof comprising:a) firstly determining upon the occurrence of a new event if the maximum amplitude of a collection of samples observed between events is equal to a predetermined positive saturation level and multiplying said predetermined positive saturation level by a negative constant, which is less than one, when said first determination is true to determine a first bias level compensation value; b) secondly determining, when said first determination is not true, if the minimum amplitude of said collection of samples observed between events is equal to a predetermined negative saturation level and multiplying said predetermined negative saturation level by said negative constant when said second determination is true to determine a second bias level compensation value; c) thirdly determining, if both said first and second determinations are not true, the average of said maximum and minimum amplitudes of said collection of samples observed between events and multiplying said average by said negative constant when said average is not within a predetermined range of amplitude values to determine a third bias level compensation value; and d) adding said first or said second or said third bias level compensation value to a value for said bipolar bias level previously accumulated during the occurrence of said event occurring just prior in time to said new event occurrence.