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. 2023 Feb 8;23(4):1899. doi: 10.3390/s23041899

Table 2.

Electromechanical properties of the exemplary magnetic field sensor referred to in this article and resulting numerical values for the derived equations.

Property Value for AM Value for PM
Static capacitance C0=44 pF
Loss factor tanδ0=5·103
Loss resistance R0(fres)=97.5 MΩ
Resonance frequency fres=7421.1 Hz
Quality factor Q=887.1
Motional resistance Rm=476.67 kΩ
Motional capacitance Cm=50.71 fF
Motional inductance Lm=9.07 kH
Magnetic operating point Bbias=0.65 mT
Magnetic sensitivity Smag=80 Hz/mT
Excitation amplitude V^ex=1 V
Feedback capacitance Cf=10 pF
Transimpedance |T(fres)|=2.145 MΩ
Excitation frequency fexAM=fres0.352 Hz fexPM=fres
Electrical sensitivity SelecAM=±112.7·1031/Hz SelecPM=239·103rad/Hz
Sensitivity cutoff frequency (3 dB) fcsAM=4.35 Hz fcsPM=4.18 Hz
Overall sensitivity |SAM(1Hz)|=8.9 1/mT |SPM(1Hz)|=18.6 rad/mT
Thermal electrical voltage noise density Ed0(fres)=27.5 nV/Hz
Thermal mechanical voltage noise density Edm(fres)=393nV/Hz
Overall noise power spectral density Sα(1 Hz)=1.55·10141/Hz Sφ(1 Hz)=1.45·1014rad2/Hz
Noise cutoff frequency (3 dB) fcnAM=7.0 HzfcsAM fcnPM=4.18 Hz=fcsPM
Overall detectivity LODAM(1Hz)=140.1 pT/Hz LODPM(1Hz)=64.8 pT/Hz
Overall detectivity cutoff frequency (+3 dB) fcdAM=5.1 Hz fcdPM=60.0 Hz