Mode coupled notched tuning fork type quartz crystal resonator

Details Mode coupled notched tuning fork type quartz crystal resonator Mode coupled notched tuning fork type quartz crystal resonator

1981-04-24

1983-10-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310351, 310352, H01L 4108

Patent

active

044108273

ABSTRACT:
A mode coupled tuning fork type quartz crystal resonator is mounted to a plug using support members of selected contour and dimensions to prevent acoustic energy loss from the plug and to avoid reduction in Q factor. A bend of 180 degrees in the support member and controlled length are factors in isolating fundamental and first overtone vibrations in flexure and fundamental torsional vibrations so as to reduce energy loss, maintain stable oscillation and improve the Q factor. A laterally extended base portion and/or tapered ends of the tuning fork arms enhance the beneficial results.

REFERENCES:
patent: Re29429 (1977-10-01), Kawai et al.
patent: 3683213 (1972-08-01), Staudte
patent: 3697766 (1972-10-01), Ganter et al.
patent: 4023055 (1977-05-01), Tsukada
patent: 4191906 (1980-03-01), Kogure

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