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Medientyp:
E-Artikel
Titel:
Noise in piezoelectric sensors
Beteiligte:
Moffett, Mark B.;
Powers, James M.
Erschienen:
Acoustical Society of America (ASA), 1990
Erschienen in:
The Journal of the Acoustical Society of America, 88 (1990) S1, Seite S160-S160
Sprache:
Englisch
DOI:
10.1121/1.2028709
ISSN:
0001-4966;
1520-8524
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p>Piezoelectric sensor noise generation mechanisms will be reviewed. The sensor needs to be considered as part of a sensor-preamplifier system whose output signal-to-noise is to be maximized. When the preamplifier noise is dominant (as is often the case), an appropriate figure-of-merit for the piezoelectric sensor material is the gd product, where g and d are the appropriate piezoelectric coefficients, i.e., the signal-to-noise ratio produced by a given volume of piezoelectric sensor material is proportional to gd. On the other hand, if Johnson noise produced in the sensor resistance is dominant, the appropriate figure-of-merit is gd/tan δ, where δ is the dielectric loss angle of the piezoelectric sensor material, i.e., the sensor resistance is introduced via the tan δ factor. The figures-of-merit of a number of piezoelectric hydrophone materials will be compared.</jats:p>