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IEVref:561-01-26ID:
Language:enStatus: Standard
Term: figure of merit, <of piezoelectric and dielectric resonators>
Synonym1:
Synonym2:
Synonym3:
Symbol: M
Definition: value M indicating the activity of the resonators, and defined by the following equation:

M= Q s γ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaad2eacqGH9aqpdaWcaaqaaiaadgfadaWgaaWcbaGaam4CaaqabaaakeaacqaHZoWzaaaaaa@3ADF@

where

Qs is the quality factor,

γ is the capacitance ratio

Note 1 to entry: In English, the term "figure of merit" has different meanings in the fields of antennae in general (see IEV 712-02-55), antenna receiving systems (see IEV 712-02-56) and transductors (see IEV 431-02-15).

Note 2 to entry: In French, the term "facteur de mérite" has a different meaning in relation to transductors (see IEV 431-02-15).

Note 3 to entry: This entry was numbered 561-07-23 in IEC 60050-561:1991, Amendment 2:1997.


Publication date:2021-03
Source:
Replaces:561-01-26:2014-11
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