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    DIFFERENTIAL ELECTRICAL BALANCE DUPLEXERS
    2.
    发明公开
    DIFFERENTIAL ELECTRICAL BALANCE DUPLEXERS 审中-公开

    公开(公告)号：US20240072839A1

    公开(公告)日：2024-02-29

    申请号：US17823292

    申请日：2022-08-30

    Applicant: Texas Instruments Incorporated

    Inventor： Sachin Kalia ,  Tolga Dinc ,  Swaminathan Sankaran ,  Sasank Garikapati

    IPC: H04B1/525 ,  H04B1/00 ,  H03H7/46 ,  H04L5/14

    CPC classification number: H04B1/525 ,  H04B1/0057 ,  H03H7/463 ,  H04L5/14

    Abstract: Electrical balance duplexers (EBDs). An example EBD includes a differential TX port coupled to a first coil, a differential RX port coupled to a second coil, a differential ANT port coupled to a third coil, and a differential BAL port coupled to a fourth coil. In some cases, the first and second coils are arranged such that magnetic flux cancellation is achieved between the two, thus isolating the TX port from the RX port. In some cases, DC isolation exists between the coils. During operation, the first coil may electromagnetically couple with the third coil and the fourth coil, and the second coil may electromagnetically couple with the third coil and the fourth coil. In some example cases, the first and second coils are each in their own metallization layer, and the third and fourth coils are in the same layer.

    Molecular clock calibration
    8.
    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
    9.
    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.

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