Crystal resonator with plural electrodes for use in a crystal os

Details Crystal resonator with plural electrodes for use in a crystal os Crystal resonator with plural electrodes for use in a crystal os

1991-02-22

1992-07-21

Grimm, Siegfried H.

Oscillators

Electromechanical resonator

Crystal

331176, 310366, H03B 532

Patent

active

051326434

ABSTRACT:
A crystal resonator with plural electrodes comprises a crystal piece, first, second and third pairs of electrodes. The crystal piece causes shear vibration. The first electrode pair is provided in the center of the crystal piece and coupled to a variable impedance. The second and third electrode pairs are provided on both sides of the first electrode pair. The second and third electrode pairs are electrically connected together and are coupled to an oscillation circuit.

REFERENCES:
patent: 4329666 (1982-05-01), Arvanitis
Bellucci et al, "A New Type of AT-Cut Quartz Resonator with Q-Factor and Frequency of the Unwanted Modes Controlled," IEE Transactions on Sonics and Ultrasonics vol. SU-28, No. 6, Nov. 1981, pp. 460-467.

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