Trapped energy resonator for oscillator and multiple resonator applications

Abstract From the Canadian patent

A trapped energy piezoelectric resonator for oscillator and multiple resonator applications has a piezoelectric substrate with electrodes disposed on each of its major surfaces. These electrodes are further comprised of a plurality of electrically interconnected and acoustically coupled subelectrodes. The resonant frequency of these resonators may be controlled by varying the separation and therefore, the, acoustic coupling between the sub-electrodes. This resonator may be used in the feedback loop of an oscillator circuit as the frequency determining element. It may also be used to provide a resonator on a substrate carrying resonators of significantly different frequency.