Cut angles for tuning fork type quartz resonators

Details Cut angles for tuning fork type quartz resonators Cut angles for tuning fork type quartz resonators

1983-07-11

1985-03-05

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310370, 310333, H01L 4108

Patent

active

045033536

ABSTRACT:
Axes X', Y' and Z' of a resonator are established from the axes X, Y and Z of a quartz crystal by virtue of two rotational movements through angles .phi. and .theta., respectively. The resonator is energized to vibrate in accordance with the fundamental torsional mode. The angles of cut .phi. and .theta. are such that the first-order temperature coefficient is zero. The torsional mode may be coupled to a flexural mode in order to render the second-order temperature coefficient zero. The fork tines extend in the X' direction. In other embodiments the tines extend in the Y' direction and the rotation .phi. and .theta. are about the X and Z' axes, respectively.

REFERENCES:
patent: 4126802 (1978-11-01), Hermann
patent: 4320320 (1982-03-01), Momosaki et al.

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