Quartz resonator vibrating in a fundamental torsion mode

Details Quartz resonator vibrating in a fundamental torsion mode Quartz resonator vibrating in a fundamental torsion mode

1992-06-04

1993-12-28

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310346, 310365, 310367, H01L 4108

Patent

active

052742970

ABSTRACT:
A thin quartz plate having opposite major surfaces, each of the opposite major surfaces having a geometrical shape symmetrical or antisymmetrical with respect to an axis of reference; and X, Y and Z crystallographic directions corresponding to electrical, mechanical and optical axes, respectively, of the quartz plate, wherein the axis of reference forms an angle .psi. with said X axis, and the major surfaces form an angle .theta. with a plane defined by said X and Y axes, the angles .theta. and .psi. being chosen such that the first order frequency-temperature coefficient (.alpha.) of the quartz resonator is substantially 0, and the second order frequency-temperature coefficient (.beta.) of said quartz resonator is substantially 0. The shape of the resonator may be rectangular, square, polygonal, circular or elliptical. The resonator is fixed on a supporting base by means of at least one pair of connecting arms located on the extension of a nodal line. The resonator of the invention finds application in the field of relatively low frequency miniature resonators suitable for encapsulation.

REFERENCES:
patent: 4313071 (1982-01-01), Hermann et al.
patent: 4320320 (1982-03-01), Momosaki et al.
patent: 4453105 (1984-06-01), Kogure
patent: 4503353 (1985-03-01), Hermann
patent: 4633124 (1986-12-01), Kawashima
patent: 5059853 (1991-10-01), Kawashima

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