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An oscillator and a resonator included in the oscillator are operated at arequency that is not the resonator frequency but that is off resonance at a frequency where the resonator has a minimum acceleration sensitivity and the desired oscillator output frequency is then electronically produced using electronic frequency synthesis techniques.

Inventor: Arthur Ballato
Original Assignee: The United States of America as represented by the Secretary of the Army
Current U.S. Classification: 331/158; 331/107.00A; 331/175
International Classification: H03B 504; H03B 532

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Citations

Cited PatentFiling dateIssue dateOriginal AssigneeTitle
US4100512Aug 8, 1977Jul 11, 1978Office National d'Etudes et de Recherches AerospatialesCrystal oscillator compensated against frequency shift due to acceleration
US4344010Oct 19, 1979Aug 10, 1982The United States of America as represented by the Secretary of the ArmyAcceleration resistant combination of opposite-handed piezoelectric crystals
US4575690Mar 25, 1985Mar 11, 1986The United States of America as represented by the Secretary of the ArmyAcceleration insensitive oscillator

Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US6873222Dec 10, 2001Mar 29, 2005COM DEV Ltd.Modified conductor loaded cavity resonator with improved spurious performance
US8188800Nov 5, 2009May 29, 2012Greenray Industries, Inc.Crystal oscillator with reduced acceleration sensitivity

Claims

1. Method of making a crystal oscillator having a desired output frequency and desensitized to acceleration fields, said method including the steps of:

(A) manufacturing and mounting a crystal resonator to be included in said oscillator,
(B) performing acceleration tests upon the resonator to determine the acceleration sensitivity variation as a function of frequency in the vicinity of the resonance frequency of the resonator,
(C) including the resonator in the oscillator and operating the resonator and oscillator at a frequency that is not the resonator frequency but that is off resonance at a frequency where the resonator has the minimum acceleration sensitivity, and
(D) electronically producing the desired oscillator output frequency using electronic frequency synthesis techniques.

2. Method according to claim 1 wherein the crystal resonator is a piezoelectric material selected from the group consisting of quartz, lithium niobate, lithium tantalate, berlinite, gallium arsenide, polycrystalline zirconium titanate ceramics and lithium tetraborate.

3. Method according to claim 2 wherein the crystal resonator is a quartz resonator.

4. Method according to claim 2 wherein the crystal resonator is a lithium niobate resonator.

5. Method according to claim 2 wherein the crystal resonator is a lithium tantalate resonator.

6. Method according to claim 2 wherein the crystal resonator is a berlinite resonator.

7. Method according to claim 2 wherein the crystal resonator is a gallium arsenide resonator.

8. Method according to claim 2 wherein the crystal resonator is a polycrystalline zirconium titanate ceramic resonator.

9. Method according to claim 2 wherein the crystal resonator is a lithium tetraborate resonator.

10. Method according to claim 1 wherein the crystal resonator is a composite of silicon and zinc oxide.

11. Method according to claim 1 wherein said crystal resonator is a bulk acoustic wave (BAW) resonator.

12. Method according to claim 1 wherein said crystal resonator is a surface acoustic wave (SAW) resonator.

13. Method according to claim 1 wherein said crystal resonator is a shallow bulk acoustic wave (SBAW) resonator.