Self-powered crystal resonator

• US 7,564,161 B1
• Filed: 12/13/2007
• Issued: 07/21/2009
• Est. Priority Date: 12/13/2007
• Status: Expired due to Fees

• Current Assignee: Bliley Technologies, Inc. (Kyocera Corporation)
• Original Assignee: Bliley Technologies, Inc. (Kyocera Corporation)
• Inventors: Ferreiro, Pablo
• Primary Examiner(s): Dougherty; Thomas M
• Application Number:
  US12/001,897
• Time in Patent Office: 586 Days
• Field of Search: 310302-305
• US Class Current: 310/305
• CPC Class Codes: G21H 1/02 Cells charged directly by beta radiation
• CPC Class Codes: H03H 9/02086 Means for compensation or elimination of undesirable effects
• CPC Class Codes: H03H 9/0514 consisting of mounting pads or bumps
• CPC Class Codes: H03H 9/0547 consisting of a vertical arrangement H03H9/0566 takes precedence
• CPC Class Codes: H03H 9/19 consisting of quartz

Abstract

A piezoelectric circuit has a base crystal with electroplated electrodes, at least one of which has a beta emitter such as Nickel 63 vacuum plated thereon to provide a self-powering capability. The size of the radioactive power source will be selected to enable the resonator to function without the benefit of an external power source for some applications. In other instances, the radioactive power source will be sized to enable the resonator to produce higher amplitude output to reduce the level of phase noise and improve resolution.

Claims

1. A piezoelectric circuit comprising

a) a piezoelectric resonator;

a) electrodes formed on said piezoelectric resonator, said electrodes being used to actuate vibration of said piezoelectric resonator;

b) a radioactive power source associated with at least one of said electrodes of said piezoelectric resonator;

whereby said piezoelectric circuit is self-powered requiring a reduced external power source.

2. The piezoelectric circuit of claim 1 wherein said radioactive power source is a radioactive layer which is associated with said at least one of said electrodes of said piezoelectric resonator.

3. The piezoelectric circuit of claim 2 wherein said layer is applied to said at least one electrode by electroplating.

4. The piezoelectric circuit of claim 2 wherein said coating is applied to said at least one electrode by vacuum deposition.

5. The piezoelectric circuit of claim 3 wherein said radioactive power source is a beta-emitter.

6. The piezoelectric circuit of claim 5 wherein said beta-emitter is Nickel 63.

7. The piezoelectric circuit of claim 1 wherein said piezoelectric resonator is a quartz crystal.

8. The piezoelectric circuit of claim 7 wherein said quartz crystal is associated with an Application Specific Integrated Circuit (ASIC) substrate.

9. The piezoelectric circuit of claim 1 wherein a size of said radioactive power source is selected to make said piezoelectric resonator self-sustaining requiring no external power source.

10. The piezoelectric circuit of claim 1 wherein a size of said radioactive power source is selected to provide said piezoelectric resonator with a larger amplitude response.

16. The self-powered crystal resonator of claim 5 wherein said beta-emitter is Nickel 63.

11. A self-powered crystal resonator comprising

a) a piezoelectric resonator;

b) at least one pair of electrodes affixed to said piezoelectric resonator;

c) a radioactive power source associated with at least one of said pair of electrodes of said piezoelectric resonator;

whereby said crystal resonator is self-powered requiring a smaller external power source.

12. The self-powered crystal resonator of claim 11 wherein said radioactive power source is a radioactive layer which is associated with said at least one of said pair of electrodes of said piezoelectric resonator.

13. The self-powered crystal resonator of claim 12 wherein said layer is applied to said at least one electrodes by electroplating.

14. The self-powered crystal resonator of claim 12 wherein said coating is applied to said at least one electrode by vacuum deposition.

15. The self-powered crystal resonator of claim 13 wherein said radioactive power source is a beta-emitter.

17. The self-powered crystal resonator of claim 11 wherein said piezoelectric resonator is a quartz crystal.

18. The self-powered crystal resonator of claim 17 wherein said quartz crystal is associated with an Application Specific Integrated Circuit (ASIC) substrate.

19. The self-powered crystal resonator of claim 11 wherein a size of said radioactive power source is selected to make said piezoelectric resonator self-sustaining requiring no external power source.

20. The self-powered crystal resonator of claim 11 wherein a size of said radioactive power source is selected to provide said piezoelectric resonator with a larger amplitude response.