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    Pullable clock oscillator
    11.
    发明授权
    Pullable clock oscillator 有权

    公开(公告)号：US10958213B2

    公开(公告)日：2021-03-23

    申请号：US16870582

    申请日：2020-05-08

    Applicant: Texas Instruments Incorporated

    Inventor： Ben-yong Zhang ,  Seong-Ryong Ryu ,  Ali Kiaei ,  Ting-Ta Yen ,  Kai Yiu Tam

    IPC: H03B5/36 ,  H03B1/04 ,  H03B5/32 ,  H03B1/02 ,  H03L7/099 ,  H03L7/093 ,  H03L7/089

    Abstract: A clock oscillator includes with a pullable BAW oscillator to generate an output signal with a target frequency. The BAW oscillator is based on a BAW resonator and voltage-controlled variable load capacitance, responsive to a capacitance control signal to provide a selectable load capacitance. An oscillator driver (such as a differential negative gm transconductance amplifier), is coupled to the BAW oscillator to provide an oscillation drive signal. The BAW oscillator is responsive to the oscillation drive signal to generate the output signal with a frequency based on the selectable load capacitance. The oscillator driver can include a bandpass filter network with a resonance frequency substantially at the target frequency.

    BULK ACOUSTIC WAVE RESONATORS HAVING CONVEX SURFACES, AND METHODS OF FORMING THE SAME
    12.
    发明申请
    BULK ACOUSTIC WAVE RESONATORS HAVING CONVEX SURFACES, AND METHODS OF FORMING THE SAME 审中-公开

    公开(公告)号：US20200382091A1

    公开(公告)日：2020-12-03

    申请号：US16902008

    申请日：2020-06-15

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Ting-Ta Yen

    IPC: H03H9/02 ,  H03H3/02

    Abstract: In bulk acoustic wave (BAW) resonators having convex surfaces, an example BAW resonator includes a first electrode, a piezoelectric layer formed on the first electrode, the piezoelectric layer having a convex surface, and a second electrode formed on the convex surface. An example integrated circuit (IC) package includes a BAW resonator in the IC package, the BAW resonator including a piezoelectric layer having a convex surface.

    Pullable clock oscillator
    13.
    发明授权
    Pullable clock oscillator 有权

    公开(公告)号：US10651789B2

    公开(公告)日：2020-05-12

    申请号：US15719540

    申请日：2017-09-28

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Ben-yong Zhang ,  Seong-Ryong Ryu ,  Ali Kiaei ,  Ting-Ta Yen ,  Kai Yiu Tam

    IPC: H03B5/36 ,  H03B1/04 ,  H03B5/32 ,  H03B1/02 ,  H03L7/099 ,  H03L7/093 ,  H03L7/089

    Abstract: A clock oscillator includes with a pullable BAW oscillator to generate an output signal with a target frequency. The BAW oscillator is based on a BAW resonator and voltage-controlled variable load capacitance, responsive to a capacitance control signal to provide a selectable load capacitance. An oscillator driver (such as a differential negative gm transconductance amplifier), is coupled to the BAW oscillator to provide an oscillation drive signal. The BAW oscillator is responsive to the oscillation drive signal to generate the output signal with a frequency based on the selectable load capacitance. The oscillator driver can include a bandpass filter network with a resonance frequency substantially at the target frequency.

    BAW oscillators with dual BAW temperature sensing
    17.
    发明授权
    BAW oscillators with dual BAW temperature sensing 有权

    公开(公告)号：US11601089B1

    公开(公告)日：2023-03-07

    申请号：US17463406

    申请日：2021-08-31

    Applicant: Texas Instruments Incorporated

    Inventor： Michael Henderson Perrott ,  Ting-Ta Yen ,  Bichoy Bahr ,  Baher S. Haroun

    IPC: H03B5/32 ,  H03L7/093 ,  H03L7/099 ,  H03B5/04

    Abstract: A temperature compensated oscillator circuit includes a first oscillator, a second oscillator, a first divider, a second divider, a frequency ratio circuit, and a temperature compensation circuit. The first divider is coupled to the first oscillator, and is configured to divide a frequency of a first oscillator signal generated by the first oscillator. The second divider is coupled to the second oscillator, and is configured to divide a frequency of a second oscillator signal generated by the second oscillator. The frequency ratio circuit is coupled to the first divider and the second divider, and is configured to determine a frequency ratio of an output of the first divider to an output of the second divider. The temperature compensation circuit is coupled to the frequency ratio circuit and the first oscillator, and is configured to generate a compensated frequency based on the frequency ratio and the first oscillator signal.

    Using acoustic reflector to reduce spurious modes
    18.
    发明授权
    Using acoustic reflector to reduce spurious modes 有权

    公开(公告)号：US11190164B2

    公开(公告)日：2021-11-30

    申请号：US16422494

    申请日：2019-05-24

    Applicant: Texas Instruments Incorporated

    Inventor： Ting-Ta Yen ,  Jeronimo Segovia Fernandez ,  Bichoy Bahr ,  Peter Smeys

    IPC: H03H9/17 ,  H03H9/13 ,  H03H9/05 ,  H03H9/10 ,  H03H9/15

    Abstract: A micromechanical system (MEMS) resonator includes a base substrate. A piezoelectric layer has a first electrode attached to a first surface of the piezoelectric layer and a second electrode attached to a second surface of the piezoelectric layer opposite the first electrode. The first electrode is bounded by a perimeter edge. A patterned acoustic mirror is formed on a top surface of the first electrode opposite the piezoelectric layer, such that the patterned acoustic mirror covers a border strip of the top surface of the first electrode at the perimeter edge and does not cover an active portion of the top surface of the first electrode.

    Laterally Vibrating Bulk Acoustic Wave Resonator
    19.
    发明申请
    Laterally Vibrating Bulk Acoustic Wave Resonator 审中-公开

    公开(公告)号：US20200021272A1

    公开(公告)日：2020-01-16

    申请号：US16505669

    申请日：2019-07-08

    Applicant: Texas Instruments Incorporated

    Inventor： Jeronimo Segovia Fernandez ,  Peter Smeys ,  Ting-Ta Yen

    IPC: H03H9/17 ,  H03H9/05 ,  H03H9/02

    Abstract: A laterally vibrating bulk acoustic wave (LVBAW) resonator includes a piezoelectric plate sandwiched between first and second metal layers. The second metal layer is patterned into an interdigital transducer (IDT) with comb-shaped electrodes having interlocking fingers. The width and pitch of the fingers of the electrodes determine the resonant frequency. A combined thickness of the first and second metal layers and the piezoelectric layer is less than the pitch of the interlocking fingers.

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