Matches in SemOpenAlex for { <https://semopenalex.org/work/W2496151136> ?p ?o ?g. }
Showing items 1 to 83 of
83
with 100 items per page.
- W2496151136 endingPage "582" @default.
- W2496151136 startingPage "561" @default.
- W2496151136 abstract "Abstract This study finds the optimum coil resistance, rc.opt, which maximizes the signal-to-noise ratio (SNR) of an electromagnetic (EM) seismometer and amplifier combination. The optimum coil resistance is shown to be the product of a seismometer factor (SF) times the noise resistance, Rn, of the amplifier. The seismometer factors range from 1.13 to 3.66 for the nine EM seismometers considered. The minimum noise figure solution, in which the amplifier noise resistance is set equal to the coil resistance, is shown to correspond to the special case in which there is no damping resistor present. It is also shown that the optimum form for the noise resistance is a constant independent of frequency and that this feature can be approximated with FET-like components such as the MAT-02. Examples of using rc.opt are given using both the 5500-ohm and the 500-ohm 1-Hz L4-C seismometers paired with the OP-27 and LT1028 operational amplifiers, respectively. It is pointed out that, although the resulting amplitude signal-to-noise ratios (ASNRs) are approximately equal, it is best to choose the seismometer-amplifier pair having the larger generator constant because it results in a larger signal. Furthermore, if the coil resistance is not the optimum value, the resulting decrease in the ASNR is less if the coil resistance is chosen greater than the optimum rather than less. The deleterious effects of mismatching seismometer and amplifier are shown by comparing ASNRs for the GS-13 seismometer paired with three different amplifiers. The degradation in ASNR is found to be as large as a factor of 3. It is pointed out that mismatching would not be done purposely but can inadvertently occur when connecting an EM seismometer to a seismic recorder whose input noise resistance properties are unknown, as in generally the case. It is recommended that manufacturers of seismic recorders obtain the necessary input noise data from the component manufacturers and supply the input noise resistance to users. Finally, the three commonly used single-ended preamplifier circuits used for EM seismometers are compared in terms of their resulting ASNRs. The same seismometer and amplifier are used in all three circuits. For the GS-13/MAT-02 pair, the noninverting, parallel damping resistor circuit resulted in an ASNR that was 3.8 times larger than that for the inverting, parallel damping resistor circuit, and 3 times larger than that for the inverting, series damping resistor circuit." @default.
- W2496151136 created "2016-08-23" @default.
- W2496151136 creator A5087002541 @default.
- W2496151136 date "1993-04-01" @default.
- W2496151136 modified "2023-09-25" @default.
- W2496151136 title "Maximizing the signal-to-noise ratio of the electromagnetic seismometer: The optimum coil resistance, amplifier characteristics, and circuit" @default.
- W2496151136 cites W1562825641 @default.
- W2496151136 cites W2258792937 @default.
- W2496151136 cites W2345649295 @default.
- W2496151136 cites W2411828540 @default.
- W2496151136 cites W2588113598 @default.
- W2496151136 cites W934914862 @default.
- W2496151136 doi "https://doi.org/10.1785/bssa0830020561" @default.
- W2496151136 hasPublicationYear "1993" @default.
- W2496151136 type Work @default.
- W2496151136 sameAs 2496151136 @default.
- W2496151136 citedByCount "14" @default.
- W2496151136 countsByYear W24961511362012 @default.
- W2496151136 countsByYear W24961511362013 @default.
- W2496151136 countsByYear W24961511362014 @default.
- W2496151136 countsByYear W24961511362015 @default.
- W2496151136 countsByYear W24961511362018 @default.
- W2496151136 crossrefType "journal-article" @default.
- W2496151136 hasAuthorship W2496151136A5087002541 @default.
- W2496151136 hasConcept C112806910 @default.
- W2496151136 hasConcept C115961682 @default.
- W2496151136 hasConcept C119217923 @default.
- W2496151136 hasConcept C119599485 @default.
- W2496151136 hasConcept C121332964 @default.
- W2496151136 hasConcept C127413603 @default.
- W2496151136 hasConcept C137488568 @default.
- W2496151136 hasConcept C147176958 @default.
- W2496151136 hasConcept C154945302 @default.
- W2496151136 hasConcept C165801399 @default.
- W2496151136 hasConcept C194257627 @default.
- W2496151136 hasConcept C199360897 @default.
- W2496151136 hasConcept C24890656 @default.
- W2496151136 hasConcept C2779843651 @default.
- W2496151136 hasConcept C30403606 @default.
- W2496151136 hasConcept C32211213 @default.
- W2496151136 hasConcept C41008148 @default.
- W2496151136 hasConcept C46362747 @default.
- W2496151136 hasConcept C99498987 @default.
- W2496151136 hasConceptScore W2496151136C112806910 @default.
- W2496151136 hasConceptScore W2496151136C115961682 @default.
- W2496151136 hasConceptScore W2496151136C119217923 @default.
- W2496151136 hasConceptScore W2496151136C119599485 @default.
- W2496151136 hasConceptScore W2496151136C121332964 @default.
- W2496151136 hasConceptScore W2496151136C127413603 @default.
- W2496151136 hasConceptScore W2496151136C137488568 @default.
- W2496151136 hasConceptScore W2496151136C147176958 @default.
- W2496151136 hasConceptScore W2496151136C154945302 @default.
- W2496151136 hasConceptScore W2496151136C165801399 @default.
- W2496151136 hasConceptScore W2496151136C194257627 @default.
- W2496151136 hasConceptScore W2496151136C199360897 @default.
- W2496151136 hasConceptScore W2496151136C24890656 @default.
- W2496151136 hasConceptScore W2496151136C2779843651 @default.
- W2496151136 hasConceptScore W2496151136C30403606 @default.
- W2496151136 hasConceptScore W2496151136C32211213 @default.
- W2496151136 hasConceptScore W2496151136C41008148 @default.
- W2496151136 hasConceptScore W2496151136C46362747 @default.
- W2496151136 hasConceptScore W2496151136C99498987 @default.
- W2496151136 hasIssue "2" @default.
- W2496151136 hasLocation W24961511361 @default.
- W2496151136 hasOpenAccess W2496151136 @default.
- W2496151136 hasPrimaryLocation W24961511361 @default.
- W2496151136 hasRelatedWork W1601105001 @default.
- W2496151136 hasRelatedWork W2119791887 @default.
- W2496151136 hasRelatedWork W2268839459 @default.
- W2496151136 hasRelatedWork W2367937973 @default.
- W2496151136 hasRelatedWork W2496151136 @default.
- W2496151136 hasRelatedWork W3021859260 @default.
- W2496151136 hasRelatedWork W4248679112 @default.
- W2496151136 hasRelatedWork W1612172593 @default.
- W2496151136 hasRelatedWork W1677674380 @default.
- W2496151136 hasRelatedWork W3119249758 @default.
- W2496151136 hasVolume "83" @default.
- W2496151136 isParatext "false" @default.
- W2496151136 isRetracted "false" @default.
- W2496151136 magId "2496151136" @default.
- W2496151136 workType "article" @default.