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.

公开(公告)号：US10365683B2

公开(公告)日：2019-07-30

申请号：US14272120

申请日：2014-05-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： David P. Magee

IPC: G06F1/08 ,  G06F1/14 ,  G06F11/34 ,  G06F11/07 ,  G06F1/06 ,  G01R23/00 ,  H03K5/19 ,  G06F15/78

Abstract: A method includes reading first and second timer count values from a timer, wherein the first timer count value is associated with a first time point and the second timer count value is associated with a second time point, calculating a difference between the first and the second timer count values, and determining whether the difference is within a range, wherein the range is based on a desired executing frequency to perform a computing task, a variation of the desired executing frequency, and a timer frequency. Further, based on the difference not being within the range, the method includes setting an error flag value to be true and incrementing an error count value.

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.

公开(公告)号：US09825564B2

公开(公告)日：2017-11-21

申请号：US15000103

申请日：2016-01-19

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： David P. Magee ,  Shih-Chin Yang

IPC: H02K29/06 ,  H02P6/18 ,  H02P21/24 ,  H02P21/13 ,  H02P6/185 ,  H02P21/32

CPC classification number: H02P6/183 ,  H02P6/18 ,  H02P6/181 ,  H02P6/185 ,  H02P21/13 ,  H02P21/24 ,  H02P21/32

Abstract: A motor controller includes a square wave voltage generator and adding circuitry for adding the square wave voltage to a first drive voltage that is connectable to the stator windings of a motor. A current monitor for monitoring the input current to the motor as a result of the square wave voltage. A device for determining the position of the rotor based on the input current.

公开(公告)号：US20240424537A1

公开(公告)日：2024-12-26

申请号：US18429076

申请日：2024-01-31

Applicant: Texas Instruments Incorporated

Inventor： David P. Magee ,  Hailong Chen

IPC: B08B7/02 ,  B06B1/02 ,  B06B1/06 ,  G02B7/02 ,  G02B27/00 ,  H04N23/55

Abstract: Methods, apparatus, systems are described in conjunction with a watertight housing designed for ultrasonic lens cleaning. An example apparatus includes a transducer having a surface and an opening; a bracket having a first surface, a second surface, a third surface, and an opening, the first surface of the bracket coupled to the surface of the transducer, the opening of the bracket aligned with the opening of the transducer; and a lens having a first surface and a second surface, the first surface of the lens is coupled to the second surface of the bracket, the second surface of the lens coupled to the third surface of the bracket, the lens covering the opening of the transducer and the opening of the bracket.

公开(公告)号：US11754905B2

公开(公告)日：2023-09-12

申请号：US16586644

申请日：2019-09-27

Applicant: Texas Instruments Incorporated

Inventor： Jeffrey Matthew Kempf ,  Nirmal C. Warke ,  David P. Magee ,  Rahmi Hezar ,  Baher S. Haroun

IPC: G01S17/08 ,  G02F1/29 ,  G01S7/481

CPC classification number: G02F1/292 ,  G01S7/4814 ,  G01S17/08

Abstract: In described examples, a system (e.g., a security system or a vehicle operator assistance system) is configured to configure a phased spatial light modulator (SLM) to generate a diffraction pattern. A coherent light source is optically coupled to direct coherent light upon the SLM. The SLM is configured to project diffracted coherent light toward a region of interest. An optical element is configured to focus the diffracted coherent light toward the at least one region of interest.

公开(公告)号：US11519882B2

公开(公告)日：2022-12-06

申请号：US17020884

申请日：2020-09-15

Applicant: Texas Instruments Incorporated

Inventor： Amardeep Sathyanarayana ,  David P. Magee ,  Anand G. Dabak ,  Srinath M. Ramaswamy

IPC: G01N29/34 ,  G01F1/667 ,  G01N29/30 ,  G01N29/50 ,  G01N29/44 ,  G01N29/12 ,  G01N29/11 ,  G01F1/66 ,  G01F25/10 ,  G01N29/36 ,  G01P5/24 ,  G01N29/024 ,  G01N29/32

Abstract: A transducer system. The system comprises a transducer and circuitry for applying an excitation waveform to excite the transducer during an excitation period. The circuitry for applying has: (i) circuitry for applying a first waveform at a first frequency; and (ii) circuitry for applying a second waveform at a second frequency differing from the first frequency.

公开(公告)号：US11333760B2

公开(公告)日：2022-05-17

申请号：US15649493

申请日：2017-07-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: G01S17/26 ,  G01S7/481

Abstract: An optical time of flight system includes a transmitter and a receiver. The transmitter is configured to generate a modulation signal having a modulation signal frequency that varies as a function of time, generate an optical waveform with amplitude modulation corresponding to the modulation signal, and direct the optical waveform toward a field of view (FOV). The receiver is configured to receive the optical waveform reflected off of an object within the FOV and determine a distance to the object based on a time of flight from the transmitter to the object and back to the receiver.

公开(公告)号：US11106030B2

公开(公告)日：2021-08-31

申请号：US15592884

申请日：2017-05-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： David P. Magee ,  Nirmal C. Warke ,  Stephen Aldridge Shaw ,  Terry Alan Bartlett ,  Rick Oden

IPC: G02B26/08 ,  G01S7/484 ,  G01S17/10 ,  G01S7/481

Abstract: An optical distance measuring system includes a first transmitter, a first solid state device, and a receiver. The first transmitter is configured to generate a first optical waveform. The first solid state device is configured to receive the first optical waveform and steer the first optical waveform toward a target object. The receiver is configured to receive the first optical waveform reflected off of the first target object and determine a distance to the first target object based on a time of flight from the transmitter to the first target object and back to the receiver.

公开(公告)号：US10690756B2

公开(公告)日：2020-06-23

申请号：US15484975

申请日：2017-04-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: G01S7/487 ,  G01S17/10

Abstract: Described examples include an integrated circuit that includes an encoder configured to modulate a driving signal for an optical transmitter with a plurality of encoded pulses corresponding to a code, in which the driving signal is transmitted to the optical transmitter periodically. The integrated circuit also includes a demodulator configured to receive a received signal from an optical receiver that is configured to receive a reflection of light transmitted by the optical transmitter off an object, the demodulator configured to discriminate the plurality of encoded pulses in the received signal and estimate a distance of the object.