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    Narrowband TIA and signaling for optical distance measurement systems
    1.
    发明授权
    Narrowband TIA and signaling for optical distance measurement systems 有权

    公开(公告)号：US11428790B2

    公开(公告)日：2022-08-30

    申请号：US15613835

    申请日：2017-06-05

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Baher S. Haroun ,  Nirmal C. Warke ,  David P. Magee

    IPC: G01S7/4861 ,  G01S7/4865 ,  G01S17/26

    Abstract: An optical distance measurement system includes a transmission circuit and a receive circuit. The transmission circuit is configured to generate narrowband intensity modulated light transmission signals over a first band of frequencies and direct the narrowband light transmission signal toward a target object. The receive circuit is configured to receive reflected light off the target object, convert the reflected light into a current signal proportional to the intensity of the reflected light, filter frequencies outside a second band of frequencies from the current signal to create a filtered current signal, and convert the filtered current signal into a voltage signal. The second band of frequencies corresponds with the first band of frequencies.

    Methods and apparatus for narrowband ranging systems using reference signal interpolation
    2.
    发明授权
    Methods and apparatus for narrowband ranging systems using reference signal interpolation 有权

    公开(公告)号：US10353062B2

    公开(公告)日：2019-07-16

    申请号：US15208945

    申请日：2016-07-13

    Applicant: Texas Instruments Incorporated

    Inventor： Nirmal C. Warke ,  David P. Magee

    IPC: G01S13/08 ,  G01S15/08 ,  G01S17/08 ,  G01S13/00

    Abstract: Methods and apparatus to determine an accurate distance to a target using reference signal interpolation is disclosed. An example apparatus includes an interpolator to receive a first sample of a reference signal and a second sample of a reference signal; and interpolating a reconstructed reference signal sample based on the first and second samples, the reconstructed reference signal corresponding to the reference signal; a correlator to generate a plurality of phase-shifted, reconstructed reference signals; and correlate each of the plurality of phase-shifted, reconstructed reference signals with a reflected signal; and an optimal phase selector to determine an optimal phase based on the correlations and output a distance to a target based on the optimal phase.

    INITIALIZATION SEQUENCE FOR BI-DIRECTIONAL COMMUNICATIONS IN A CARRIER-BASED SYSTEM
    4.
    发明申请
    INITIALIZATION SEQUENCE FOR BI-DIRECTIONAL COMMUNICATIONS IN A CARRIER-BASED SYSTEM 有权
    基于载体系统的双向通信的初始化序列

    公开(公告)号：US20140140380A1

    公开(公告)日：2014-05-22

    申请号：US13683826

    申请日：2012-11-21

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Nirmal C. Warke ,  Bradley Kramer ,  Robert F. Kramer

    IPC: H04L7/10

    CPC classification number: H04L7/10 ,  H04L27/34

    Abstract: A method is provided. An initial bit sequence is received by a receiver. A local oscillator is locked initially to a local reference and subsequently to the received signal using the initial bit sequence, and automatic gain control (AGC) is performed once the local oscillator is locked to the local reference. A Costas loop is then activated so as to achieve carrier frequency offset (CFO) lock, and sign inversion is detected. The receiver then synchronized with an end-of-training pattern.

    Abstract translation: 提供了一种方法。 初始位序列由接收器接收。 本地振荡器最初被锁定到本地参考，然后使用初始位序列被锁定到接收到的信号，并且一旦本地振荡器被锁定到本地参考，就执行自动增益控制（AGC）。 然后激活科斯塔斯循环，以实现载波频率偏移（CFO）锁定，并且检测到符号反转。 接收器然后与训练结束模式同步。

    BALUN WITH INTEGRATED DECOUPLING AS GROUND SHIELD
    5.
    发明申请
    BALUN WITH INTEGRATED DECOUPLING AS GROUND SHIELD 有权
    BALUN以集成的解除为地面

    公开(公告)号：US20140139297A1

    公开(公告)日：2014-05-22

    申请号：US13683735

    申请日：2012-11-21

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Swaminathan Sankaran ,  Brian P. Ginsburg ,  Vijay B. Rentala ,  Srinath M. Ramaswamy ,  Eunyoung Seok ,  Baher Haroun ,  Bradley A. Kramer ,  Hassan Ali ,  Nirmal C. Warke

    IPC: H01P5/10

    CPC classification number: H01P5/10 ,  H03H1/0007 ,  H05K1/0216

    Abstract: An apparatus is provided. Transmission line cells are formed in a first region. A first metallization layer is formed over the transmission line cells within a portion of the first region. At least a portion of the first metallization layer is electrically coupled to the plurality of transmission line cells. A second metallization layer is formed over the first metallization layer with an interconnect portion, and overlay portion, and a first balun. The interconnect portion at least partially extends into the first region, and the overlay portion is within the first region. The first balun winding is electrically coupled to the overlay portion and partially extends into a second region. The first region partially surrounds the second region. A third metallization layer is formed over the second metallization layer having a second balun winding within the second region, where the second winding is generally coaxial with the first balun winding.

    Abstract translation: 提供了一种装置。 传输线路单元形成在第一区域中。 在第一区域的一部分内的传输线单元上形成第一金属化层。 第一金属化层的至少一部分电耦合到多个传输线单元。 在第一金属化层上形成第二金属化层，其具有互连部分，覆盖部分和第一平衡 - 不平衡变换器。 互连部分至少部分地延伸到第一区域中，并且覆盖部分在第一区域内。 第一平衡 - 不平衡变压器绕组电耦合到覆盖部分并且部分地延伸到第二区域中。 第一区域部分地围绕第二区域。 在第二金属化层上形成第三金属化层，该第二金属化层在第二区域内具有第二平衡 - 不平衡变压器绕组，其中第二绕组大体上与第一平衡 - 不平衡变压器绕组同轴。

    Power efficient LIDAR
    6.
    发明授权
    Power efficient LIDAR 有权

    公开(公告)号：US11221411B2

    公开(公告)日：2022-01-11

    申请号：US15638255

    申请日：2017-06-29

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Nirmal C. Warke ,  David P. Magee ,  Baher S. Haroun

    IPC: G01C3/08 ,  G01S17/26 ,  H03F3/08 ,  G01S17/10 ,  G01S7/4861 ,  G01S17/36 ,  G01S7/484 ,  G01S17/34

    Abstract: Described examples include an integrated circuit having an analog-to-digital converter operable to receive an input signal derived from a light signal and convert the input signal to a digital received signal, the analog-to-digital converter operable to receive the input signal during at least one window. The integrated circuit further has a receiver operable to receive the digital received signal, the receiver operable to determine a distance estimate of an object from which the light signal is reflected based on the digital received signal. In an example, the window locations are chosen to correspond to the locations of maximum slope in the signal.

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