Constructing an Electronic Circuitry for Label-free Hall Biosensors

Year 2019, Volume: 7 Issue: 4, 366 - 372, 30.10.2019

Davut İzci

https://doi.org/10.17694/bajece.633908

Abstract

Magnetic field has a
huge potential of providing non-destructive and highly efficient detection
platforms in biosensing field. It provides a low intrinsic background in
biological systems since those systems have no comparable biological signal.
Hall devices are currently dominating the market of the magnetic sensors due to
several advantages such as allowing miniaturization, being compatible with
electronics integration, cheaper fabrication and room temperature operation
with high linearity. It is important to construct a suitable front-end
circuitry in order to be able to achieve a portable and label-free working Hall
biosensor. This paper presents the construction of an electronic circuitry that
is required for actuating Hall based biosensors and obtaining the output since
there are undesired effects which are causing less sensitive or less accurate
results. The paper takes a closer look at those effects and presents the
solution to the problem by introducing a developed circuitry on a designed
printed circuit board along with the promising results it has achieved.

Keywords

Hall effect, Hall biosensors, offset removal, spinning current circuitry

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