公开(公告)号：US20190028807A1

公开(公告)日：2019-01-24

申请号：US16040853

申请日：2018-07-20

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric LINDEMANN ,  Itisha TYAGI ,  John L. MELANSON

IPC: H04R7/04

Abstract: Embodiments described herein provide an audio device and a method of operating the audio device. The audio device comprises at least one surface, a first surface transducer positioned to excite first modes of oscillation in a first surface of the at least one surface, and a second surface transducer positioned to excite second modes of oscillation in a second surface of the at least one surface, wherein the first modes of oscillation are of a higher frequency than the second modes of oscillation.

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：US20230328439A1

公开(公告)日：2023-10-12

申请号：US18188112

申请日：2023-03-22

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Ross C. MORGAN ,  Michael ROBINSON ,  Itisha TYAGI

IPC: H04R5/04 ,  H04R3/12 ,  H04S1/00 ,  H04R5/02

CPC classification number: H04R5/04 ,  H04R3/12 ,  H04R5/02 ,  H04S1/007 ,  H03F3/187

Abstract: An integrated circuit (IC), comprising: a first transducer driver for driving a first transducer; a second transducer driver for driving a second transducer; and boost circuitry comprising first and second boost nodes, the boost converter configurable to boost a supply voltage received at one or more input pins of the IC to provide first and second boosted voltages to respective first and second transducer drivers via respective first and second boost nodes.

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.

公开(公告)号：US20190260333A1

公开(公告)日：2019-08-22

申请号：US16272215

申请日：2019-02-11

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Eric LINDEMANN ,  Itisha TYAGI

IPC: H03F1/30 ,  H03F13/00 ,  G01R27/08 ,  G01R27/26

Abstract: A method for controlling one or more parameters of an amplifier system may include receiving an indication of a physical quantity associated with the amplifier system, determining one or more parameters of the amplifier system in response to the indication, and causing the amplifier system to operate in accordance with the one or more parameters.