1、NORME INTERNATIONALE INTERNATIONAL STANDARD CE1 IEC 61 080 Premire dition First edition 1991-12 Guide pour la mesure des paramtres lectriques quivalents des rsonateurs quartz Guide to the measurement of equivalent electrical parameters of quartz crystal units Numro de rfrence Reference number CEVIEC
2、 61080: 1991 Numros des publications Numbering Depuis le ler janvier 1997, les publications de la CE1 sont numrotes partir de 60000. Publications consolides Les versions consolides de certaines publications de la CE1 incorporant les amendements sont disponibles. Par exemple, les numros ddition 1.0,
3、1.1 et 1.2 indiquent respectivement la publication de base, la publication de base incorporant lamendement 1, et la publication de base incorporant les amendements 1 et 2. Validit de la prsente publication Le contenu technique des publications de la CE1 est constamment revu par la CE1 afin quil refl
4、te ltat actuel de la technique. Des renseignements relatifs la date de reconfir- mation de la publication sont disponibles dans le Catalogue de la CEI. Les renseignements relatifs des questions ltude et des travaux en cours entrepris par le comit technique qui a tabli cette publication, ainsi que la
5、 liste des publications tablies, se trouvent dans les documents ci- dessous: (Site web de la CEI“ Catalogue des publications de la CE1 Publi annuellement et mis jour rgulirement (Catalogue en ligne)* Bulletin de la CE1 Disponible la fois au the others will be “spurious“ or “unwanted“ modes for that
6、application, and will correspond to other overtone modes of thickness shear, width shear, extentional and flexure vibrations as well as the anharmonic modes of thickness shear and thickness twist. While this model of a crystal unit is quite complete, and capable of describing its electrical response
7、 over a very wide frequency range, it is fortunate that this degree of sophis- tication is rarely, if ever, needed. In the remainder of this standard, we will consider three degrees of simplification from this very general equivalent circuit, and discuss some of the applications for which each is su
8、itable. 3 Simplified equivalent networks In most cases, the response of the crystal unit to applied electrical signals needs be consi- dered over only limited frequency ranges, which will include the “design mode“ frequency and may include one or more of the other “unwanted“ modes. The frequency range of inter- est may extend above and below the desired mode frequency by only a fraction of a percent, or in the case of a filter application, a range of several percent may be required. If the application is a filter circuit, or a voltage-controlled or temperature-compensated
