Patent Document ID: 20060063218
Application ID: 11270063
Patent Flag: 0

Claim One:
1. One or more microprocessors, comprising programming to control: selecting a current integration method for an analyte-related current signal, wherein (i) said analyte-related current signal comprises data points, (ii) an electrode system comprising two or more electrode sets is used for detecting said analyte-related current signal, each electrode set comprises an iontophoretic electrode and an electrochemical sensor element, wherein each of the two iontophoretic electrodes alternately function as cathode and anode, (iii) a current signal, comprising data points, is detected in a half-measurement cycle at each of the anode and the cathode, and (iv) the analyte-related current signal is obtained from the sensor element associated with the cathode; determining a background baseline for a given sensor when associated with the cathode based on the last two data points of the current signal detected for the same sensor in a previous half-cycle when the sensor was associated with the anode; and subtracting the background baseline from the analyte-related current signal and if over-subtraction of the analyte-related current signal occurs, employing one of the following integration methods to determine an analyte-related charge signal based on the analyte-related current signal: (i) stopping integration when the maximum integral is reached and using the maximum integral as the analyte-related charge signal; or (ii) recalculating a background baseline based on the last two data points from the analyte-related current signal at the cathode; subtracting the recalculated background baseline from the analyte-related current signal, and integrating the background subtracted analyte-related current signal to obtain the analyte-related charge signal.