公开(公告)号：US20200314538A1

公开(公告)日：2020-10-01

申请号：US16903044

申请日：2020-06-16

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Nicholas ROCHE ,  Anthony S. DOY ,  Itisha TYAGI

IPC: H04R3/00 ,  H04R29/00 ,  H04R17/00

Abstract: A method of fabricating a piezoelectric transducer may include interleaving a plurality of layers of piezoelectric material with a plurality of conductive layers including a first conductive layer, one or more second conductive layers, and one or more third conductive layers, coupling the first conductive layer to a first electrode, wherein an electrical impedance of the first conductive layer varies as a function of a temperature internal to the piezoelectric transducer, and such that a measurement signal indicative of the electrical impedance is generated at the first electrode, coupling the one or more second conductive layers to a second electrode, and coupling the one or more third conductive layers to a third electrode, such that an electrical driving signal driven to the second electrode and the third electrode causes mechanical vibration of the piezoelectric transducer as a function of the electrical driving signal.

公开(公告)号：US20190268696A1

公开(公告)日：2019-08-29

申请号：US16287235

申请日：2019-02-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Nicholas ROCHE ,  Anthony S. DOY ,  Itisha TYAGI

IPC: H04R3/00 ,  H04R17/00 ,  H04R29/00

Abstract: A method of fabricating a piezoelectric transducer may include interleaving a plurality of layers of piezoelectric material with a plurality of conductive layers including a first conductive layer, one or more second conductive layers, and one or more third conductive layers, coupling the first conductive layer to a first electrode, wherein an electrical impedance of the first conductive layer varies as a function of a temperature internal to the piezoelectric transducer, and such that a measurement signal indicative of the electrical impedance is generated at the first electrode, coupling the one or more second conductive layers to a second electrode, and coupling the one or more third conductive layers to a third electrode, such that an electrical driving signal driven to the second electrode and the third electrode causes mechanical vibration of the piezoelectric transducer as a function of the electrical driving signal.