Patent ID: 8604810

Claim:
A method for operating an array of biosensors, comprising: operating a first control amplifier that receives a first input from a first reference electrode and provides a first output to a counter electrode; enabling first current measurement circuitry for detecting at least one first current associated with a first working electrode while the first control amplifier is operative, wherein the counter electrode is operative with the first control amplifier to maintain a first specified voltage between the first reference electrode and the first working electrode; enabling second current measurement circuitry for detecting at least one second current associated with a second working electrode while the first control amplifier is operative, wherein the counter electrode is operative with the first control amplifier to maintain the first specified voltage between the first reference electrode and the second working electrode; disabling the first control amplifier subsequent to detecting the at least one second current associated with the second working electrode while the first control amplifier is operative; operating, subsequent to disabling the first control amplifier, a second control amplifier that receives a second input from a second reference electrode and provides a second output to the counter electrode, wherein the first current measurement circuitry detects at least one third current associated with the first working electrode while the second control amplifier is operative, wherein the second current measurement circuitry detects at least one fourth current associated with the second working electrode while the second control amplifier is operative, wherein the counter electrode is operative with the second control amplifier to maintain a second specified voltage between the second reference electrode and the second working electrode.