Claims
- 1. A method of operating a piezoelectric device capable of reducing an effect of a piezoelectric material, comprising the steps of:
connecting an electrical field bias to the piezoelectric device; and applying the electrical field bias to the piezoelectric device during an operation of the piezoelectric device.
- 2. The method of claim 1 wherein the piezoelectric device is a piezoelectric sensor element, and the step of applying the electrical field bias comprises connecting a voltage bias to the piezoelectric sensor element through a circuit impedance component.
- 3. The method of claim 1 wherein the piezoelectric device is a piezoelectric actuator element, and the step of applying the electrical field bias comprises adding a voltage bias to an electrical actuation signal.
- 4. An electrical circuit for amplifying a voltage output of a piezoelectric sensor, comprising:
a voltage amplifier for generating an electrical signal output proportional to the voltage output of the piezoelectric sensor; and a bias network that applies an electrical field bias to the piezoelectric sensor.
- 5. The electrical circuit of claim 4 wherein the bias network is comprised of a circuit impedance component connected to a voltage bias.
- 6. An electrical circuit for amplifying the voltage outputs of a plurality of piezoelectric sensors, comprising:
a voltage amplifier for generating an electrical signal output proportional to difference of the voltage outputs of the plurality of piezoelectric sensors; and a bias network that applies an electrical field bias to the plurality of piezoelectric sensors.
- 7. The electrical circuit of claim 6 wherein the bias network is comprised of circuit impedance components connected to a voltage bias.
- 8. An electrical circuit for amplifying a charge output of a piezoelectric sensor, comprising:
a charge amplifier for generating an electrical signal output proportional to the charge output of the piezoelectric sensor; and a bias network that applies an electrical field bias to the piezoelectric sensor.
- 9. The electrical circuit of claim 8 wherein the bias network is comprised of a circuit impedance component connected to a voltage bias.
- 10. An electrical circuit for amplifying charge outputs of a plurality of piezoelectric sensors, comprising:
a charge amplifier for generating an electrical signal output proportional to difference of the charge outputs of the plurality of piezoelectric sensors; and a bias network that applies an electrical field bias to the plurality of piezoelectric sensors.
- 11. The electrical circuit of claim 10 wherein the bias network is comprised of circuit impedance components connected to a voltage bias.
- 12. An electrical circuit for driving a piezoelectric actuator, comprising:
a primary driver circuit for generating an actuation signal output and a secondary driver circuit for generating an electrical field bias.
- 13. A piezoelectric sensor device capable of reducing an effect of a piezoelectric material, comprising an electrical circuit for sensing and amplifying an output of the piezoelectric sensor device.
- 14. The piezoelectric sensor device of claim 13, wherein the piezoelectric material is a thin-film piezoelectric material.
- 15. A piezoelectric actuator device capable of reducing an effect of a piezoelectric material, comprising an electrical circuit for driving the actuator device to generate an actuation signal output and an electrical field bias.
- 16. The piezoelectric actuator device of claim 15, wherein the piezoelectric material is a thin-film piezoelectric material.
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] The present utility patent application claims priority of U.S. Provisional Patent Application, Serial No. 60/408,177 filed Sep. 4, 2002, subject matter of which is incorporated herewith by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60408177 |
Sep 2002 |
US |