公开(公告)号：US20240017292A1

公开(公告)日：2024-01-18

申请号：US17865710

申请日：2022-07-15

Applicant: Texas Instruments Incorporated

Inventor： David Magee ,  James Griffin ,  Felipe Garza, III

IPC: B06B1/02 ,  G02B27/00 ,  B08B7/02 ,  B08B13/00

CPC classification number: B06B1/0215 ,  G02B27/0006 ,  B08B7/028 ,  B08B13/00 ,  B06B2201/70

Abstract: An example apparatus operable to provide power to a transducer via a regulator output, the power regulator comprising: filter circuitry including a filter input and a filter output, the filter output coupled to the regulator output; amplifier circuitry including an amplifier input and an amplifier output, the amplifier output coupled to the filter input; sensing circuitry including a sensing input and a sensing output, the sensing input coupled to the filter output and the regulator output; and a controller including a controller input coupled to the sensing output and including a controller output coupled to the amplifier input, the controller configured to: supply an excitation signal to the amplifier circuitry to cause the amplifier circuitry to supply the power based on the excitation signal; estimate a magnitude of the power based on measurements of current and voltage at the filter output.

公开(公告)号：US20240017300A1

公开(公告)日：2024-01-18

申请号：US17866329

申请日：2022-07-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： David Magee ,  James Griffin

IPC: B08B7/02 ,  B06B1/02 ,  B06B1/06 ,  G02B27/00

CPC classification number: B08B7/028 ,  B06B1/0276 ,  B06B1/0644 ,  G02B27/0006

Abstract: In one example, an apparatus comprises: a transducer, a driver circuit coupled to the transducer, a memory, and a controller. The memory is configured to store a power profile, the power profile including a mapping between power metrics and oscillation frequencies of the transducer, the power metrics being indicative of a power delivered to the transducer. The controller is coupled to the memory and the driver circuit, the controller configured to: obtain the power profile from the memory; determine a frequency of a driver signal based on the power profile; and provide the driver signal having the frequency to the driver circuit.

公开(公告)号：US20230161154A1

公开(公告)日：2023-05-25

申请号：US18158878

申请日：2023-01-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yunhong Li ,  David Magee ,  Stephen John Fedigan

IPC: G02B27/00 ,  B08B7/02 ,  B60S1/56

CPC classification number: G02B27/0006 ,  B08B7/028 ,  B60S1/56 ,  B60R11/04

Abstract: A lens structure system with a lens structure and a multi-segmented transducer coupled to the lens structure. Each segment in the plurality of segments has a first conductor and a second conductor, wherein the first conductor and the second conductor are electrically coupled to the segment. The system also has circuitry for applying a voltage to selected segments in the plurality of segments with standing wave signals and traveling wave signals.

公开(公告)号：US12081159B2

公开(公告)日：2024-09-03

申请号：US17592921

申请日：2022-02-04

Applicant: Texas Instruments Incorporated

Inventor： Venkata Naresh Kotikelapudi ,  Kaushik Alwala ,  David Magee ,  James Lockridge ,  Siddhartha Gopal Krishna

IPC: H02P6/00 ,  H02P6/10 ,  H02P6/16 ,  H02P6/182 ,  H02P27/08

CPC classification number: H02P6/182 ,  H02P6/10 ,  H02P27/08

Abstract: A motor control system and method for controlling a brushed direct current (BDC) motor using a feedback loop based on a corrected ripple count. Motor control circuitry, for example implemented in digital logic such as a microcontroller, receives a coil current signal and a motor voltage signal. Discontinuities in the coil current signal, such as caused by commutation of the BDC motor, are counted to generate a ripple count. An observer function derives an angular frequency model estimate for the values of the coil current and motor voltage signals using a computational model for the motor. A corrected ripple count is generated based on a comparison of a commutation angle of the motor with an angular position based on the angular frequency model estimate over a time interval between discontinuity pulses. A motor drive signal is adjusted based on the corrected ripple count.

公开(公告)号：US20230253898A1

公开(公告)日：2023-08-10

申请号：US17592921

申请日：2022-02-04

Applicant: Texas Instruments Incorporated

Inventor： Venkata Naresh Kotikelapudi ,  Kaushik Alwala ,  David Magee ,  James Lockridge ,  Siddhartha Gopal Krishna

IPC: H02P6/182 ,  H02P6/10 ,  H02P27/08

CPC classification number: H02P6/182 ,  H02P6/10 ,  H02P27/08

Abstract: A motor control system and method for controlling a brushed direct current (BDC) motor using a feedback loop based on a corrected ripple count. Motor control circuitry, for example implemented in digital logic such as a microcontroller, receives a coil current signal and a motor voltage signal. Discontinuities in the coil current signal, such as caused by commutation of the BDC motor, are counted to generate a ripple count. An observer function derives an angular frequency model estimate for the values of the coil current and motor voltage signals using a computational model for the motor. A corrected ripple count is generated based on a comparison of a commutation angle of the motor with an angular position based on the angular frequency model estimate over a time interval between discontinuity pulses. A motor drive signal is adjusted based on the corrected ripple count.

公开(公告)号：US11460551B2

公开(公告)日：2022-10-04

申请号：US16287411

申请日：2019-02-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Baher Haroun ,  Rahmi Hezar ,  Srinath Ramaswamy ,  Nirmal C. Warke ,  David Magee ,  Ting Li

IPC: G01S7/481 ,  G01S17/10 ,  G01S7/4865 ,  G01S7/484

Abstract: A pulsed light source illuminates a scene with a virtual array of points. Light reflected by the scene is detected by a small pixel array, allowing generation of a three-dimensional map of the scene. A processing element processing data output by the small pixel array uses a multipath resolution algorithm to resolve individual objects in the scene.