Patents by Inventor Anand Dabak

Anand Dabak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210266039
    Abstract: In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parity information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.
    Type: Application
    Filed: May 10, 2021
    Publication date: August 26, 2021
    Inventors: Badri N Varadarajan, Anand Dabak, II Han Kim
  • Patent number: 11005530
    Abstract: In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parity information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: May 11, 2021
    Assignee: Texas Instruments Incorporated
    Inventors: Badri N Varadarajan, Anand Dabak, Il Han Kim
  • Patent number: 10955273
    Abstract: A method of calculating a time difference is disclosed. The method includes receiving a first ultrasonic signal (r21) from a first transducer (UT1) and receiving a second ultrasonic signal (r12) from a second ultrasonic transducer (UT2). The first and second ultrasonic signals are sampled to produce respective first and second sampled ultrasonic signals (502). Points having a value greater than a first threshold are selected from the first and second sampled ultrasonic signals (510). A difference in travel time between the first and second ultrasonic signals is calculated (512) in response to the selected points.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: March 23, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anand Dabak, Venkata Ramanan
  • Publication number: 20200400472
    Abstract: A method of calculating a time difference is disclosed. The method includes sampling a first ultrasonic signal (r21) to produce a first sampled signal (y1(i)) and sampling a second ultrasonic signal (r12) to produce a second sampled signal (y2(i)). A first time (LEAD_LAG) is determined between a time the first sampled signal crosses a threshold (?1) and a time the second sampled signal crosses the threshold. The first sampled signal is cross correlated with the second sampled signal to produce a second time (SAMP_OFFSET). The time difference is calculated in response to the first and second times.
    Type: Application
    Filed: August 31, 2020
    Publication date: December 24, 2020
    Inventors: Anand Dabak, Venkata Ramanan
  • Publication number: 20200378811
    Abstract: An integrated circuit includes one or more central processing unit (CPU) cores configured to cause a first ultrasonic transducer to generate ultrasonic signals into a fluid moving in a pipe and the first or a second ultrasonic transducer to receive the ultrasonic signals from the fluid. The CPU core(s) also compute a first value indicative of at least one of a standard deviation and a time correlation based on the received ultrasonic signals. The CPU core(s) further determine a second value indicative of a volume of gas bubbles in the fluid using the computed first value indicative of the at least one of the standard deviation and time correlation.
    Type: Application
    Filed: May 26, 2020
    Publication date: December 3, 2020
    Inventors: Anand DABAK, Srinivas LINGAM
  • Patent number: 10809365
    Abstract: A frequency modulated continuous wave (FMCW) radar system that includes a transceiver coupled to an analog to digital converter (ADC), and a digital signal processor (DSP) coupled to the ADC. The transceiver is configured to transmit a plurality of FMCW chirps, receive a plurality of reflected FMCW chirps, and mix the plurality of reflected FMCW chirps with at least one of the FMCW chirps to generate a plurality of beat signals. The reflected FMCW chirps are the FMCW chirps after being reflected off of a target object. The ADC is configured to convert the beat signals into a plurality of digital chirps. The DSP is configured to receive the digital chirps and quantify a plurality of vibration parameters for the target object based on a comparison of phase information in a frequency domain between one of the plurality of FMCW chirps and one of the plurality of digital chirps.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: October 20, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sujeet Milind Patole, Anand Dabak, Lei Ding, Murtaza Ali
  • Patent number: 10801868
    Abstract: A method of calculating a time difference is disclosed. The method includes sampling a first ultrasonic signal (r21) to produce a first sampled signal (y1(i)) and sampling a second ultrasonic signal (r12) to produce a second sampled signal (y2(i)). A first time (LEAD_LAG) is determined between a time the first sampled signal crosses a threshold (?1) and a time the second sampled signal crosses the threshold. The first sampled signal is cross correlated with the second sampled signal to produce a second time (SAMP_OFFSET). The time difference is calculated in response to the first and second times.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: October 13, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anand Dabak, Venkata Ramanan
  • Publication number: 20200209337
    Abstract: Using a phase interferometry method which utilizes both amplitude and phase allows the determination and estimation of multipath signals. To determine the location of an object, a signal that contains sufficient information to allow determination of both amplitude and phase, like a packet that includes a sinewave portion, is provided from a master device. A slave device measures the phase and amplitude of the received packet and returns this information to the master device. The slave device returns a packet to the master that contains a similar sinewave portion to allow the master device to determine the phase and amplitude of the received signals. Based on the two sets of amplitude and phase of the RF signals, the master device utilizes a fast Fourier transform or techniques like multiple signal classification to determine the indicated distance for each path and thus more accurately determines a location of the slave device.
    Type: Application
    Filed: December 26, 2018
    Publication date: July 2, 2020
    Inventors: Anand DABAK, Marius MOE, Charles SESTOK
  • Publication number: 20200209031
    Abstract: A computer-readable storage device stores machine instructions which, when executed by one or more central processing unit (CPU) cores, causes the one or more CPU cores to use a first ultrasonic transducer and a second ultrasonic transducer to measure fluid flow using a current measurement frequency and to perform a temperature calibration process. The temperature calibration process includes the sequentially generation of a plurality of electrical signals for the first ultrasonic transducer, the generated electrical signals each having a different frequency. For each frequency, the temperature calibration process includes the measurement of an amplitude of a signal from the second ultrasonic transducer. Based on the measured amplitudes of the signals from the second ultrasonic transducer, the temperature calibration process includes the determination of a new measurement frequency. The first and second ultrasonic transducers are used to measure fluid flow using the new measurement frequency.
    Type: Application
    Filed: December 26, 2018
    Publication date: July 2, 2020
    Inventors: Anand DABAK, Srinath Mathur RAMASWAMY, Luis Fernando REYNOSO COVARRUBIAS
  • Publication number: 20200209984
    Abstract: An optical position sensing system is disclosed. The system includes a substrate having a surface. A plurality of photodetectors are at multiple locations across the surface, each of the plurality of photodetectors providing detector pulse signals in response to receiving the light. The system further includes a processor that determines a phase shift between the transmitted light pulse signals and the respective detector pulse signals and applies a multi-path resolution operation to distinguish between the detector pulse signals representing the transmitted light pulse signals and those representing reflected light pulse signals. The processor also calculates a distance of a transmitting device from each of the photodetectors based on the determined phase shift and the multi-path resolution operation and calculates a multi-dimensional position of the transmitting device relative to the substrate based on the calculated distances.
    Type: Application
    Filed: December 28, 2018
    Publication date: July 2, 2020
    Inventors: TING LI, RAHMI HEZAR, SRINATH MATHUR RAMASWAMY, ANAND DABAK, BAHER HAROUN
  • Publication number: 20200209388
    Abstract: An ultrasound detect circuit includes a decimator that decimates a transmit signal to be transmitted through an ultrasonic transducer. The transmit signal is decimated to generate first and second template signals. The decimator uses a different decimation ratio to generate the first template signal than the second template signal. The circuit also includes a first correlator to correlate a signal derived from the ultrasonic transducer with the first template signal, aa second correlator to correlate the signal derived from the ultrasonic transducer with the second template signal, and a Doppler shift determination circuit to determine a Doppler frequency shift based on an output from the first correlator and an output from the second correlator.
    Type: Application
    Filed: December 26, 2018
    Publication date: July 2, 2020
    Inventors: Lei DING, Srinath Mathur RAMASWAMY, Anand DABAK
  • Publication number: 20200153480
    Abstract: In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parity information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.
    Type: Application
    Filed: January 16, 2020
    Publication date: May 14, 2020
    Inventors: Badri N Varadarajan, Anand Dabak, II Han Kim
  • Publication number: 20200116536
    Abstract: A flow meter ultrasonically measures fluid velocity in a pipe and ultrasonically transmits fluid flow data along the pipe. An ultrasonic transducer used for fluid velocity measurement may optionally also be used for communication of flow data, and optionally, the ultrasonic frequency for fluid velocity measurement may be the same as the ultrasonic frequency for communication of flow data.
    Type: Application
    Filed: December 16, 2019
    Publication date: April 16, 2020
    Inventors: Anand Dabak, Clive Bittlestone
  • Patent number: 10541727
    Abstract: In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parity information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: January 21, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Badri N Varadarajan, Anand Dabak, Il Han Kim
  • Patent number: 10508937
    Abstract: A flow meter ultrasonically measures fluid velocity in a pipe and ultrasonically transmits fluid flow data along the pipe. An ultrasonic transducer used for fluid velocity measurement may optionally also be used for communication of flow data, and optionally, the ultrasonic frequency for fluid velocity measurement may be the same as the ultrasonic frequency for communication of flow data.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: December 17, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anand Dabak, Clive Bittlestone
  • Patent number: 10495502
    Abstract: A method, system and apparatus is disclosed for auto-tuning a circuit associated with an upstream transducer (UPT) and a circuit associated with a downstream transducer (DNT) for reciprocal operation in an ultrasonic flowmeter. The method includes exchanging signals between the upstream transducer and the downstream transducer; comparing at least one of respective maximum amplitudes of an upstream signal and a downstream signal and respective center frequencies of a Fast Fourier Transform (FFT) of the upstream signal and the downstream signal; and responsive to determining that at least one of the respective maximum amplitudes and the respective center frequencies do not match, correcting the mismatch.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: December 3, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: R Venkata Ramanan, Anand Dabak, Amardeep Sathyanarayana
  • Publication number: 20190360849
    Abstract: In circuitry for applying a pulse train to excite a transducer, the circuitry selects a first set having a first number of pulses at a first frequency and a second set of pulses having a second number of pulses at a second frequency differing from the first frequency. At least one pulse from the first set is located in the pulse train between one or more of the pulses at the second frequency.
    Type: Application
    Filed: August 12, 2019
    Publication date: November 28, 2019
    Inventors: Anand Dabak, Amardeep Sathyanarayana, Luis Fernando Reynoso, Venkataramanan Ramamurthy
  • Patent number: 10378938
    Abstract: A transducer system with a transducer and circuitry for applying a pulse train to excite the transducer. The circuitry for applying a pulse train selects a first set having a first number of pulses at a first frequency and a second set of pulses having a second number of pulses at a second frequency differing from the first frequency. At least one pulse from the first set is located in the pulse train between one or more of the pulses at the second frequency.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: August 13, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anand Dabak, Amardeep Sathyanarayana, Luis Fernando Reynoso, Venkataramanan Ramamurthy
  • Publication number: 20190199402
    Abstract: In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parity information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.
    Type: Application
    Filed: November 27, 2018
    Publication date: June 27, 2019
    Inventors: Badri N Varadarajan, Anand Dabak, II Han Kim
  • Patent number: 10330508
    Abstract: A method of ultrasound flow metering includes applying a first and second pulse train to an ultrasound transducer pair (T1, T2) positioned for coupling ultrasonic waves therebetween. Responsive to the first pulse train applied to T1, T1 transmits an ultrasonic wave received as received ultrasonic wave (R12) by T2 after propagating through fluid in a pipe. Responsive to the second pulse train applied to T2, T2 transmits an ultrasonic wave received as received ultrasonic wave by (R21) T1 after propagating through the fluid. During the pulse trains, R12 and R21 build up in amplitude to provide excitation portions. The pulse trains are terminated, so that R12 and R21 decay as a damped free oscillation. Windowing is applied to R12 and R21 to generate windowed portions. A signal delay between t12 and t21 (?TOF) is calculated using only windowed portions, and a fluid flow is calculated from the ?TOF.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: June 25, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Amardeep Sathyanarayana, Anand Dabak, David Patrick Magee