Thickness shear resonator for use as an over-tone quartz crystal

Details Thickness shear resonator for use as an over-tone quartz crystal Thickness shear resonator for use as an over-tone quartz crystal

1977-09-02

1978-09-12

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310320, 310353, 310365, 310368, 310369, H01L 4110

Patent

active

041140621

ABSTRACT:
A thickness shear resonator used as an overtone quartz crystal for a quartz stabilized oscillator which has an operating frequency in the MHz range that has an excitation electrode on each of its plane parallel surfaces running in the x, z' plane and where the thickness of the vibrator in the y' direction is determined by the distance of these surfaces from one another wherein the vibrator presents a dimensional ratio between its dimensions measured in the z' direction and its thickness which is determined by a fundamental quartz crystal frequency having a value of 1/3 of the operating frequency, thus, resulting in an oscillator which is not sensitive to influences from associated oscillating components.

REFERENCES:
patent: 2306909 (1942-12-01), Sykes
patent: 3382381 (1968-05-01), Horton
patent: 3401276 (1968-09-01), Curran et al.
patent: 3684905 (1972-08-01), Martyn
patent: 3745385 (1973-07-01), Nakajima et al.
patent: 3792294 (1974-02-01), Royer

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