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    Closed loop control for piezoelectric-based power converters
    12.
    发明授权
    Closed loop control for piezoelectric-based power converters 有权

    公开(公告)号：US11716023B2

    公开(公告)日：2023-08-01

    申请号：US17348122

    申请日：2021-06-15

    Applicant: Texas Instruments Incorporated

    Inventor： Yinglai Xia ,  Yogesh Ramadass ,  Jessica Danielle Boles

    IPC: H02M3/158 ,  H03H9/17 ,  H02M3/00

    CPC classification number: H02M3/158 ,  H03H9/17 ,  H02M3/01

    Abstract: A power converter including a piezoelectric resonator. The power converter includes a first transistor coupled between an input terminal and a first plate of the piezoelectric resonator, and a second transistor coupled between the first plate of the piezoelectric resonator and an output terminal. A load may be coupled at the output terminal. Controller circuitry has inputs coupled to the input node, the output node, and to the first plate of the piezoelectric resonator, and outputs coupled to control terminals of the first and second transistors. The controller circuitry operates to turn on the first transistor responsive to a comparison of voltages at the first plate and the input terminal, turn on the second transistor responsive to a comparison of voltages at the first plate and the output terminal, and turn off one of the first and second transistors responsive to an output level at the output terminal.

    PIEZOELECTRIC AUDIO DEVICE
    14.
    发明申请
    PIEZOELECTRIC AUDIO DEVICE 有权

    公开(公告)号：US20250080920A1

    公开(公告)日：2025-03-06

    申请号：US18240668

    申请日：2023-08-31

    Applicant: Texas Instruments Incorporated

    Inventor： Bichoy Bahr ,  Udit Rawat ,  Mohit Chawla ,  Yogesh Ramadass

    IPC: H04R17/10 ,  H04R3/04 ,  H04R17/02 ,  H04R29/00 ,  H10N30/50 ,  H10N30/87

    Abstract: In one example, an audio device includes a substrate, a first piezoelectric flap, a second piezoelectric flap, a transmit circuit, a first receive circuit, a switch circuit, and a second receive circuit. The substrate has an opening. The first piezoelectric flap has a first end on the substrate and extending over the opening, the first piezoelectric flap having first and second terminals. The second piezoelectric flap has a second end on the substrate and extending over the opening, the second piezoelectric flap spaced from the first piezoelectric flap, the second piezoelectric flap having third and fourth terminals. The transmit circuit has driver outputs. The first receive circuit has first receiver inputs. The switch circuit coupled to the driver outputs and the first receiver inputs, and the first and second terminals. The second receive circuit has second receiver inputs coupled to the third and fourth terminals.

    PIEZOELECTRIC AUDIO DEVICE
    15.
    发明申请
    PIEZOELECTRIC AUDIO DEVICE 有权

    公开(公告)号：US20250080918A1

    公开(公告)日：2025-03-06

    申请号：US18240676

    申请日：2023-08-31

    Applicant: Texas Instruments Incorporated

    Inventor： Bichoy Bahr ,  Udit Rawat ,  Mohit Chawla ,  Yogesh Ramadass

    IPC: H04R17/02 ,  H04R17/10 ,  H10N30/063 ,  H10N30/086 ,  H10N30/20 ,  H10N30/87

    Abstract: In one example, an apparatus comprises a substrate, a first piezoelectric flap, and a second piezoelectric flap. The substrate has an opening. The first piezoelectric flap has a first end on the substrate and has a first portion extending over a first part of the opening, the first piezoelectric flap including first electrodes, in which the first electrodes extend no more than half of a first length of the first portion. The second piezoelectric flap has a second end on the substrate and has a second portion extending over a second part of the opening, the second piezoelectric flap including second electrodes, in which the second electrodes extend no more than half of a second length of the second portion.

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