  In this manuscript we propose a theoretical model where the magneto-resistive
elements are modelled as fluctuating resistances to correct the output voltage
noise of tunnel magnetic junction (MTJ) from standard electronic circuits. This
model is validated on single elements, partial and full Wheatstone bridge
circuits, giving rise to a correction factor affecting the output noise voltage
as well as sensitivity values. Combining the correction factor and a
normalization by the number of MTJs pillars and the pillar surface, we show
that the performances extracted by this method allow universal comparison
between any results from literature.
