EXCITATION AND MEASUREMENT METHOD FOR A MAGNETIC BIOSENSOR

摘要

The present invention relates to an excitation and measurement method for a magnetic biosensor. Using at least a digital magnetic sensor element (100) a magnetic bead (110) is magnetized such that a magnetic stray field of the magnetic bead (110) prevents switching of a magnetic element (108) of the at least a digital magnetic sensor element (100) when the magnetic bead (110) is in close proximity to the top surface of the at least a digital magnetic sensor element (100). Measuring of the state of the magnetic element (108) allows the determination of a presence or non-presence of a magnetic bead (110). The method is highly advantageous by employing MRAM technology in biosensor systems.