Driver circuitry comprising active inductor circuitry for piezoelectric transducers
AssigneeCirrus Logic, Inc.
InventorJohn P. Lesso
Life of this patent
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Abstract
The present disclosure relates to circuitry for driving a piezoelectric transducer. The circuitry may be implemented as an integrated circuit and comprises driver circuitry configured to supply a drive signal to cause the transducer to generate an output signal and active inductor circuitry configured to be coupled with the piezoelectric transducer. The active inductor circuitry may be tuneable to adjust a frequency characteristic of the output signal.
Claims20
Circuitry for driving a piezoelectric transducer, the circuitry comprising:
- a driver circuitry configured to supply a drive signal to cause the piezoelectric transducer to generate an output signal;
- and
- an active inductor circuitry configured to be coupled with the piezoelectric transducer, wherein the active inductor circuitry is tuneable to adjust a frequency characteristic of the output signal;
- wherein the circuitry is configured such that, in use of the circuitry, the active inductor circuitry is coupled in series with the piezoelectric transducer.
An integrated circuit comprising:
- a driver circuitry configured to generate a drive signal to cause a piezoelectric transducer to generate an output signal;
- and
- an active inductor circuitry configured to be coupled with the piezoelectric transducer;
- wherein the integrated circuit is configured such that, in use of the integrated circuit, the active inductor circuitry is coupled in series with the piezoelectric transducer.
A system comprising:
- a first piezoelectric transducer associated with first driver circuitry and first active inductor circuitry;
- and
- a second piezoelectric transducer associated with second driver circuitry and second active inductor circuitry,
- wherein the first active inductor circuitry is tuneable so as to provide a first operational bandwidth for the first piezoelectric transducer and the second active inductor circuitry is tuneable so as to provide a second operational bandwidth, different from the first operational bandwidth, for the second piezoelectric transducer;
- wherein the system is configured such that, in use of the system, the first active inductor circuitry is coupled in series with the first piezoelectric transducer and the second active inductor circuitry is coupled in series with the second piezoelectric transducer.
A circuitry for driving a piezoelectric transducer, the circuitry comprising:
- driver circuitry configured to supply a drive signal;
- and
- gyrator circuitry configured to be coupled with the piezoelectric transducer, wherein the gyrator circuitry is tuneable to adjust an operational frequency characteristic of the piezoelectric transducer;
- wherein the circuitry is configured such that, in use of the circuitry, the gyrator circuitry is coupled in series with the piezoelectric transducer.
Dependencies are inferred from the claim text.