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    BAW oscillators with dual BAW temperature sensing
    11.
    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.

    Molecular clock calibration
    12.
    发明授权
    Molecular clock calibration 有权

    公开(公告)号：US11342928B1

    公开(公告)日：2022-05-24

    申请号：US17460575

    申请日：2021-08-30

    Applicant: Texas Instruments Incorporated

    Inventor： Bichoy Bahr ,  Baher Haroun ,  Swaminathan Sankaran ,  Juan Alejandro Herbsommer

    IPC: H03L7/197 ,  H03L7/081 ,  H03L7/099 ,  H03L7/093

    Abstract: A method, providing an oscillator output signal to reference inputs of a PLL and an output clock circuit; providing a first divisor value to a control input of the PLL to regulate a closed loop that includes a physics cell, a receiver, and the PLL; providing a second divisor value to a control input of the output clock circuit to control an output frequency of an output clock signal; shifting the first divisor value in a first direction to cause a perturbation in the closed loop; shifting the second divisor value in an opposite second direction to counteract a response of the closed loop to the perturbation and to regulate the output frequency of the output clock signal; and based on the receiver output signal, analyzing the response of the closed loop to the perturbation.

    Microelectromechanical system resonator-based oscillator
    13.
    发明授权
    Microelectromechanical system resonator-based oscillator 有权

    公开(公告)号：US11228280B1

    公开(公告)日：2022-01-18

    申请号：US17164588

    申请日：2021-02-01

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Bichoy Bahr ,  Sachin Kalia ,  Swaminathan Sankaran

    IPC: H03B5/36 ,  H03B5/04 ,  H03B5/30 ,  H03B5/12

    Abstract: A device includes a MEMS resonator and oscillator circuit coupled to the MEMS resonator. The circuit includes a first transistor having a first control terminal and first and second current terminals, and a second transistor having a second control terminal and third and fourth current terminals. The circuit includes a resonator coupling network configured to inductively couple MEMS resonator terminals to the first and third current terminals, and to couple the first and third current terminals. The circuit includes a control terminal coupling network configured to couple the first and second control terminals, and to reduce a voltage swing at the first and second control terminals relative to a voltage swing at the first and third current terminals. The circuit includes a second terminal coupling network configured to couple the second and fourth current terminals. A second terminal coupling network resonant frequency is approximately that of MEMS resonator.

    Using acoustic reflector to reduce spurious modes
    14.
    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.

    Molecular clock with delay compensation
    15.
    发明授权
    Molecular clock with delay compensation 有权

    公开(公告)号：US11188032B2

    公开(公告)日：2021-11-30

    申请号：US16589176

    申请日：2019-10-01

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Bichoy Bahr ,  Argyrios Dellis ,  Adam Fruehling ,  Juan Alejandro Herbsommer

    IPC: G04F5/00

    Abstract: A clock generator includes a hermetically sealed cavity and clock generation circuitry. A dipolar molecule in the hermetically sealed cavity has a quantum rotational state transition at a fixed frequency. The clock generation circuitry generates an output clock signal based on the fixed frequency of the dipolar molecule. The clock generation circuitry includes a detection circuit, a reference oscillator, and control circuitry. The detection circuit generates a first detection signal and a second detection signal representative of amplitude of signal at an output of the hermetically sealed cavity responsive to a first sweep signal and a second sweep signal input to the hermetically sealed cavity. The control circuitry sets a frequency of the reference oscillator based on a difference in time of identification of the fixed frequency of the dipolar molecule in the first detection signal and the second detection signal.

    Self-Injection Locking for Low-Power Low-Phase Noise Oscillators
    19.
    发明申请
    Self-Injection Locking for Low-Power Low-Phase Noise Oscillators 审中-公开

    公开(公告)号：US20190068197A1

    公开(公告)日：2019-02-28

    申请号：US15690117

    申请日：2017-08-29

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Bichoy Bahr ,  Baher Haroun ,  Ali Kiaei

    IPC: H03L1/02 ,  H03K3/03 ,  H03H9/54 ,  H03L7/24

    Abstract: Methods and systems for producing a low-power, low-phase noise oscillating signal using a self-injection locking oscillator. Preferred embodiments include, for example, producing, using an oscillator, a signal having a base frequency component and an Nth harmonic component, wherein N is a selected integer and N>1; filtering said signal through a bandpass filter with Q factor ≥5, said filter configured to pass said Nth harmonic component as a filtered Nth harmonic component; and injecting said filtered Nth harmonic component into said oscillator to thereby self-injection lock said base frequency of said signal.

    Micro-mechanical resonator having out-of-phase and out-of-plane flexural mode resonator portions
    20.
    发明授权
    Micro-mechanical resonator having out-of-phase and out-of-plane flexural mode resonator portions 有权

    公开(公告)号：US12212298B2

    公开(公告)日：2025-01-28

    申请号：US17877206

    申请日：2022-07-29

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Hakhamanesh Mansoorzare ,  Ting-Ta Yen ,  Jeronimo Segovia-Fernandez ,  Bichoy Bahr

    IPC: H03H3/007 ,  H03H9/02 ,  H03H9/10

    Abstract: A micro-mechanical resonator die includes: micro-mechanical resonator die layers; a cavity formed in at least one of the micro-mechanical resonator die layers; and a micro-mechanical resonator suspended in the cavity. The micro-mechanical resonator includes: a base; a first resonator portion extending from the base along a first plane; and a second resonator portion extending from the base along a second plane. The first resonator portion is configured to operate in an out-of-plane flexural mode that displaces at least part of the first resonator portion out of the first plane. The second resonator portion is configured to operate in an out-of-plane flexural mode that displaces at least part of the second resonator portion out of the second plane and out-of-phase relative to the first resonator portion.

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