Resonator having a stator coupled to three stator voltages

• US 8,049,579 B2
• Filed: 10/30/2008
• Issued: 11/01/2011
• Est. Priority Date: 10/30/2008
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Kiyama, Lennie K, Hartwell, Peter, Walmsley, Robert G., Zhang, Wenhua
• Primary Examiner(s): Summons; Barbara
• Application Number:
  US12/261,647
• Publication Number:
  US 20100109579A1
• Time in Patent Office: 1,097 Days
• Field of Search: 333/186, 333197-200, 310/309, 333/18, 74/5.R, 74/54
• US Class Current: 333/186
• CPC Class Codes: H02N 1/004 in which a body is moved along a path due to interaction with an electric field travelling along the path
• CPC Class Codes: H03H 9/24 Constructional features of resonators of material which is not piezoelectric, electrostrictive, or magnetostrictive

Abstract

A resonator includes a translator, a stator, and a control circuit. The control circuit is configured to provide first and second translator voltages and first through third stator voltages, wherein the translator is configured to move with respect to the stator at a resonant frequency of the resonator in response to the control circuit.

Claims

1. A resonator comprising:

a translator including a first set of translator electrodes commonly connected to a first translator voltage and a second set of translator electrodes commonly connected to a second translator voltage, wherein the first set of translator electrodes are arranged on the translator alternatively with the second set of translator electrodes;

a stator including a first set of stator electrodes commonly connected to a first stator voltage, a second set of stator electrodes commonly connected to a second stator voltage, and a third set of stator electrodes commonly connected to a third stator voltage, wherein the first set of stator electrodes are arranged on the stator alternatively with the second and third sets of stator electrodes; and

a control circuit configured to provide the first and second translator voltages and first through third stator voltages, wherein the translator is configured to move with respect to the stator at a resonant frequency of the resonator in response to the control circuit.

2. The resonator of claim 1, wherein a ratio of a pitch between a pair of immediately adjacent electrodes of the translator to a pitch between a pair of immediately adjacent electrodes of the stator is at least substantially equal to 1.5.

3. The resonator of claim 1, wherein the ratio of a pitch between immediately adjacent electrodes of the translator to a gap between the translator and the stator is at least substantially equal to 1.6.

4. The resonator of claim 1, wherein the first translator voltage is a periodic signal having a frequency at least substantially equal to a structural resonant frequency of the resonator, and the second translator voltage is an inverse of the periodic signal.

5. The resonator of claim 1, wherein each of the first and second translator voltages are periodic signals in time having a frequency approximately two times a structural resonant frequency of the resonator for the movement of the translator with respect to the stator.

6. The resonator of claim 1, wherein the first and second translator voltages each include a periodic component in time and a non-zero, time-invariant component forming a bias voltage, and the bias voltage is useable for tuning the resonator.

7. The resonator of claim 1, wherein a set of the first through third stator voltages is a selected one of (+Vr, −

Vr, −

Vr), (−

Vr, +Vr, −

Vr), (−

Vr, −

Vr, +Vr) (+Vr, +Vr, −

Vr), (+Vr, −

Vr, +Vr), and (−

Vr, +Vr, +Vr), where the first through third voltages in order in the selected set correspond to the first through third stator voltages, respectively.

8. The resonator of claim 1, further comprising a suspension structure to elastically suspend the translator within the resonator.

9. A method comprising:

providing first and second translator voltages to a translator of a resonator, wherein the translator includes a first set of translator electrodes commonly connected to the first translator voltage and a second set of translator electrodes commonly connected to the second translator voltage, wherein the first set of translator electrodes are arranged on the translator alternatively with the second set of translator electrodes;

providing first through third stator voltages to a stator of the resonator, wherein the stator includes a first set of stator electrodes commonly connected to the first stator voltage, a second set of stator electrodes commonly connected to the second stator voltage, and a third set of stator electrodes commonly connected to the third stator voltage, wherein the first set of stator electrodes are arranged on the stator alternatively with the second and third sets of stator electrodes; and

causing the stator to move at a resonant frequency of the resonator.

10. The method of claim 9, wherein each of the first and second translator voltages are periodic signals having a frequency approximately two times a structural resonant frequency of the resonator for the movement of the translator with respect to the stator.

11. The method of claim 9, wherein the first translator voltage is a periodic signal having a frequency at least substantially equal to a structural resonant frequency of the resonator, and the second translator voltage is an inverse of the periodic signal.

12. The method of claim 9, wherein a set of the first through third stator voltages is a selected one of (+Vr, −

Vr, −

Vr), (−

Vr, +Vr, −

Vr), (−

Vr, −

Vr, +Vr), (+Vr, +Vr, −

Vr), (+Vr, −

Vr, +Vr), and (−

Vr, +Vr, +Vr), where the first through third voltages in order in the selected set correspond to the first through third stator voltages, respectively.

13. A computer program product embodied on one or more computer readable storage mediums, the computer program product comprising instructions for:

providing first and second translator voltages to a translator of a resonator, wherein the translator includes a first set of translator electrodes commonly connected to the first translator voltage and a second set of translator electrodes commonly connected to the second translator voltage, wherein the first set of translator electrodes are arranged on the translator alternatively with the second set of translator electrodes;

providing first through third stator voltages to a stator of the resonator, wherein the stator includes a first set of stator electrodes commonly connected to the first stator voltage, a second set of stator electrodes commonly connected to the second stator voltage, and a third set of stator electrodes commonly connected to the third stator voltage, wherein the first set of stator electrodes are arranged on the stator alternatively with the second and third sets of stator electrodes; and

causing the stator to move at a resonant frequency of the resonator.

14. The computer program product of claim 13, wherein each of the first and second translator voltages are periodic signals having a frequency approximately two times a structural resonant frequency of the resonator for the movement of the translator with respect to the stator.

15. The computer program product of claim 13, wherein the first translator voltage is a periodic signal having a frequency at least substantially equal to a structural resonant frequency of the resonator, and the second translator voltage is an inverse of the periodic signal.