Doubly rotated quartz resonators with a low amplitude-frequencyeffect: the LD-cut

摘要

This article deals with a crystal quartz cut with virtually nonamplitude-frequency effect (also called "isochronism defect" orn"anisochronism"). The cut, called LD-cut (Low isochronism Defect), isnset in a BVA-type structure for later use in an Ultra-Stable Oscillatorn(USO). Various design parameters are presented, along with thenproperties of the resonator. The resonance frequencies of various modes,nthe temperature dependence, the motional parameters and the phase noisenin relation to the power supplied to the resonator are mainly studied.nThese properties are compared to those of the SC-cut resonators