Table 3 Variables for noise floor calculation in the proposed system with QCM

Noise spectral density \({{\rm{N}}}_{1}\)(@1 Hz)

\(21.3{\rm{\mu }}{\rm{V}}/\sqrt{{\rm{Hz}}}\)

\(22.2{\rm{\mu }}{\rm{V}}/\sqrt{{\rm{Hz}}}\)

Noise spectral density \({{\rm{N}}}_{{\rm{n}}}\)(@1 Hz)

\(9.8{\rm{\mu }}{\rm{V}}/\sqrt{{\rm{Hz}}}\)

\(5.6{\rm{\mu }}{\rm{V}}/\sqrt{{\rm{Hz}}}\)

Measured signal \({{\rm{X}}}_{1}\)

0.802 V

0.805 V

Measured signal \({{\rm{X}}}_{{\rm{n}}}\)

0.337 V

0.087 V

Scale factor \({{\rm{K}}}_{{\rm{scale}},{\rm{out}}1}\)

\({2}^{15}\)

\({2}^{21}\)

Scale factor \({{\rm{K}}}_{{\rm{scale}},{\rm{out}}2}\)

\({2}^{6}\)

\({2}^{12}\)

Normalized sensitivity

505638

3238894