H - Electricity – 01 – L
Patent
H - Electricity
01
L
356/200, 331/52,
H01L 41/08 (2006.01) H03H 9/19 (2006.01)
Patent
CA 1237491
Abstract of the Disclosure Improvement of resonator circuit parameters, unwanted mode suppression, and the frequency-temperature characteristic of a crystal resonator is provided by a doubly cut crystal resonator plate having at least one major face including a cylindrical contour, the axis of which is parallel to the direction of the projection of the eigenvector (the normal coordinate) for the desired operating mode. The cylinder axis is at an angle to the doubly rotated electrical axis such that the fast shear"b"mode is suppressed while the slow shear"c"mode is unaffected. The radius of the cylinder is selectively chosen for altering the frequency-temperature characteristic.
497547
Aspila Kalevi P.
The Government Of The United States As Represented By The Secret
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