公开(公告)号：US12216270B2

公开(公告)日：2025-02-04

申请号：US17382128

申请日：2021-07-21

Applicant: Texas Instruments Incorporated

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

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

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：US11231493B2

公开(公告)日：2022-01-25

申请号：US16208306

申请日：2018-12-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Nirmal C. Warke ,  David P. Magee

IPC: G01S13/08 ,  G01S7/40 ,  G01S7/4865 ,  G01S7/4915 ,  G01S7/497 ,  G01S7/52 ,  G01S7/526 ,  G01S15/08 ,  G01S17/08 ,  G01S13/00

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.

公开(公告)号：US11092674B2

公开(公告)日：2021-08-17

申请号：US15649413

申请日：2017-07-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: G01S7/48 ,  G01S7/484 ,  G01S17/10 ,  G01S7/4865 ,  G01S17/36 ,  G01S17/42 ,  G01S7/4915

Abstract: An optical transmitting system for distance measuring includes a signal generator, a laser diode coupled to the signal generator, and an optics device. The signal generator is configured to generate a first plurality of electrical signals. The laser diode is configured to generate a first plurality of optical waveforms that correspond with the first plurality of electrical signals. The optics device is configured to receive the first plurality of optical waveforms and direct the first plurality of optical waveforms toward a first plurality of scan points that form a scan region within a field of view (FOV). A first signal type, a first signal duration, a first signal amplitude, or a first signal repetition frequency of the first plurality of optical waveforms is based on a first desired range of the first plurality of scan points.

公开(公告)号：US10908287B2

公开(公告)日：2021-02-02

申请号：US15396457

申请日：2016-12-31

Applicant: Texas Instruments Incorporated

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

IPC: G01S17/32 ,  G01S7/487 ,  G01S17/42 ,  G01S17/10 ,  G01S7/484 ,  G01S7/4911

Abstract: In described examples, an integrated circuit includes a modulator configured to modulate a driving signal for an optical transmitter with a narrow band modulation signal in which the driving signal with a fixed duration is transmitted to the optical transmitter periodically. The integrated circuit also includes a demodulator configured to receive a 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 narrow band modulation signal and estimate a distance of the object using the narrow band modulation signal.

公开(公告)号：US10145948B2

公开(公告)日：2018-12-04

申请号：US15208948

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 a distance to a target using coarse and fine delay estimation based on a narrowband transmit signal are disclosed. 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.

公开(公告)号：US20180017678A1

公开(公告)日：2018-01-18

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: G01S17/10 ,  H03F3/08 ,  G01S17/32

CPC classification number: G01S17/102 ,  G01S7/484 ,  G01S7/4861 ,  G01S17/10 ,  G01S17/325 ,  G01S17/36 ,  H03F3/08

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.

公开(公告)号：US20170329010A1

公开(公告)日：2017-11-16

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: 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.

公开(公告)号：US20170328993A1

公开(公告)日：2017-11-16

申请号：US15485147

申请日：2017-04-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: G01S7/491 ,  G01S7/484 ,  G01S7/493 ,  G01S17/36

CPC classification number: G01S7/4911 ,  G01S7/484 ,  G01S7/487 ,  G01S7/493 ,  G01S17/10 ,  G01S17/36

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：US20150280320A1

公开(公告)日：2015-10-01

申请号：US14734371

申请日：2015-06-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Baher S. Haroun ,  Marco Corsi ,  Siraj Akhtar ,  Nirmal C. Warke

IPC: H01Q3/44 ,  H01Q9/04 ,  H01Q3/26

CPC classification number: H01Q3/44 ,  H01L23/3107 ,  H01L23/66 ,  H01L24/16 ,  H01L24/48 ,  H01L24/49 ,  H01L2223/6677 ,  H01L2224/16225 ,  H01L2224/16227 ,  H01L2224/16245 ,  H01L2224/48227 ,  H01L2224/48247 ,  H01L2224/49175 ,  H01L2924/00014 ,  H01L2924/12041 ,  H01L2924/12042 ,  H01L2924/12043 ,  H01L2924/14 ,  H01L2924/3011 ,  H01Q3/26 ,  H01Q9/0407 ,  H01L2924/00 ,  H01L2224/45099 ,  H01L2224/45015 ,  H01L2924/207

Abstract: In some developing interconnect technologies, such as chip-to-chip optical interconnect or metal waveguide interconnects, misalignment can be a serious issue. Here, however, a interconnect that uses an on-chip directional antenna (which operates in the sub-millimeter range) to form a radio frequency (RF) interconnect through a dielectric waveguide is provided. This system allows for misalignment while providing the increased communication bandwidth.

Abstract translation: 在一些开发的互连技术中，例如芯片到芯片的光学互连或金属波导互连，错位可能是一个严重的问题。 然而，这里提供了使用片上定向天线（其在亚毫米范围内操作）通过介质波导形成射频（RF）互连的互连。 该系统允许不对准，同时提供增加的通信带宽。