公开(公告)号：US10534083B2

公开(公告)日：2020-01-14

申请号：US15458054

申请日：2017-03-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Udayan Dasgupta ,  David P. Magee ,  Murtaza Ali

IPC: G01S15/89 ,  A61B8/06 ,  A61B8/08 ,  A61B8/00 ,  G01S7/52

Abstract: Systems and methods for color Doppler imaging in an ultrasound imaging system are disclosed herein. An ultrasound imaging system includes color Doppler imaging circuitry. The color Doppler imaging circuitry is configured to estimate flow parameters. The imaging circuitry includes a radio frequency (“RF”) demodulator configured to produce in-phase and quadrature components of an ultra-sound data vector. The RF demodulator includes a table in memory that stores interleaved sine and cosine values. The RF demodulator maintains an index value for the table having higher precision than is used to index the table. The RF demodulator rounds the index value for each access of the table. Each table access retrieves a sine value and a cosine value.

公开(公告)号：US20170184720A1

公开(公告)日：2017-06-29

申请号：US15458054

申请日：2017-03-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Udayan Dasgupta ,  David P. Magee ,  Murtaza Ali

IPC: G01S15/89 ,  A61B8/00 ,  A61B8/06 ,  A61B8/08

Abstract: Systems and methods for color Doppler imaging in an ultrasound imaging system are disclosed herein. An ultrasound imaging system includes color Doppler imaging circuitry. The color Doppler imaging circuitry is configured to estimate flow parameters. The imaging circuitry includes a radio frequency (“RF”) demodulator configured to produce in-phase and quadrature components of an ultra-sound data vector. The RF demodulator includes a table in memory that stores interleaved sine and cosine values. The RF demodulator maintains an index value for the table having higher precision than is used to index the table. The RF demodulator rounds the index value for each access of the table. Each table access retrieves a sine value and a cosine value.

公开(公告)号：US20240201376A1

公开(公告)日：2024-06-20

申请号：US18589693

申请日：2024-02-28

Applicant: Texas Instruments Incorporated

Inventor： Terry A. Bartlett ,  Nirmal C. Warke ,  David P. Magee ,  Jeffrey Scott Farris ,  Patrick Oden

IPC: G01S17/26 ,  G01S7/481 ,  G01S7/484

CPC classification number: G01S17/26 ,  G01S7/4814 ,  G01S7/4816 ,  G01S7/4817 ,  G01S7/484

Abstract: In described examples, a method includes receiving light from a field of view on a spatial light modulator that includes a two-dimensional array of picture elements in rows and columns; and determining a portion of the two-dimensional array that corresponds to a region of interest in response to a transmit scan beam illuminating the field of view. The method also includes directing light from the portion of the two-dimensional array to a photodiode, and directing light outside the portion away from the photodiode.

公开(公告)号：US11249512B2

公开(公告)日：2022-02-15

申请号：US16525185

申请日：2019-07-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： David P. Magee

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

Abstract: A method includes reading first and second timer count values from a timer. 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. Also, the method includes calculating a difference between the first and the second timer count values, and determining whether the difference is within a range. 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：US20210356734A1

公开(公告)日：2021-11-18

申请号：US17382128

申请日：2021-07-21

Applicant: Texas Instruments Incorporated

Inventor： David P. Magee ,  Nimal 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：US20210096442A1

公开(公告)日：2021-04-01

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: G02F1/29 ,  G01S7/481 ,  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：US10809235B2

公开(公告)日：2020-10-20

申请号：US15236666

申请日：2016-08-15

Applicant: Texas Instruments Incorporated

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

IPC: G01N29/34 ,  G01F1/66 ,  G01N29/30 ,  G01F25/00 ,  G01N29/50 ,  G01N29/44 ,  G01N29/12 ,  G01N29/11 ,  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：US20200292681A1

公开(公告)日：2020-09-17

申请号：US16835432

申请日：2020-03-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: G01S7/4911 ,  G01S7/493 ,  G01S7/484 ,  G01S17/36 ,  G01S7/487 ,  G01S17/10

Abstract: Described example aspects include an integrated circuit includes a timing controller configured to select a selected time slot in a measurement period having a plurality of time slots and a transmit driver configured to provide a transmit signal in accordance with the selected time slot, in which the transmit signal is transmitted to an optical transmitter. The integrated circuit also includes a range estimator configured to receive a received signal after the selected time slot from an optical receiver that is configured to receive a reflection of light transmitted by the optical transmitter off an object, the range estimator configured to determine an estimated distance of the object based on the received signal.

公开(公告)号：US10698108B2

公开(公告)日：2020-06-30

申请号：US15681468

申请日：2017-08-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: G01C3/08 ,  G01S17/10 ,  G01S17/42 ,  G01S17/26 ,  G01S7/484 ,  G01S7/4863 ,  G01S7/4865

Abstract: An optical distance measuring system includes a transmitter and a receiver. The transmitter is configured to generate a first optical waveform and direct the first optical waveform toward a first scan point within a field of view (FOV). The receiver is configured to receive the first optical waveform reflected off a first object within the FOV, direct the first optical waveform reflected off the first object to a first photodiode group of an array of photodiode elements, and determine a distance to the first object based on a time of flight of the first optical waveform from the transmitter to the first object and back to the receiver.

公开(公告)号：US20190101633A1

公开(公告)日：2019-04-04

申请号：US16208306

申请日：2018-12-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Nirmal C. Warke ,  David P. Magee

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

Abstract: An example apparatus includes a transducer to receive a reference signal and a reflected signal, the reflected signal being the reference signal after being reflected of a target; a filter to generate a band-pass reference signal and a band-pass reflected signal by filtering (A) reference signal samples associated with the reference signal and (B) reflected signal samples associated with the reflected signal; a correlator to generate a first correlation by correlating the reference signal samples with the reflected signal samples and a second correlation by correlating the band-pass reference signal with the band-pass reflected signal; and a delay estimator to determine a distance to the target based on the first correlation (coarse delay) and the second correlation (fine delay) and output a signal including the distance to the target.