Oscillators – Electromechanical resonator – Crystal
Patent
1982-11-08
1984-11-06
Grimm, Siegfried H.
Oscillators
Electromechanical resonator
Crystal
310320, 310365, 310366, 331163, 333189, 333198, H01L 4104, H03B 532
Patent
active
044814887
ABSTRACT:
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 sub-electrodes. 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.
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Gillman James W.
Grimm Siegfried H.
Miller Jerry
Motorola Inc.
Roney Edward M.
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