Crystal resonator device

Details Crystal resonator device Crystal resonator device

1992-07-28

1994-04-19

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310369, H01L 4109, H01L 4118

Patent

active

053048873

ABSTRACT:
A resonator comprises a quartz resonator element (11) sealed between a pair of flat quartz housing members (12, 13) the resonator comprises an active central region 110 defined by an annular recess 111 within which vibrational energy is trapped. The crystal orientation of the housing may be aligned with that of the resonator to minimise thermal effects.

REFERENCES:
patent: Re26707 (1969-11-01), Cutler et al.
patent: 3617780 (1971-11-01), Benjaminson et al.
patent: 4057770 (1977-11-01), Henningsen et al.
patent: 4135108 (1979-01-01), Besson
patent: 4221986 (1980-09-01), Besson
patent: 4317059 (1982-02-01), Besson
patent: 4334168 (1982-06-01), Besson et al.
patent: 4405875 (1983-09-01), Nagai
patent: 4848643 (1989-07-01), Frische et al.

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