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).
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Publication number: 20230421201Abstract: 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: ApplicationFiled: September 5, 2023Publication date: December 28, 2023Inventors: Badri N. Varadarajan, Anand Dabak, II Han Kim
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Publication number: 20230400336Abstract: 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: ApplicationFiled: August 14, 2023Publication date: December 14, 2023Inventors: Anand DABAK, Srinivas LINGAM
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Patent number: 11791862Abstract: 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: GrantFiled: May 10, 2021Date of Patent: October 17, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Badri N Varadarajan, Anand Dabak, Il Han Kim
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Patent number: 11747181Abstract: 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: GrantFiled: January 13, 2022Date of Patent: September 5, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Anand Dabak, Venkata Ramanan
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Patent number: 11736144Abstract: In described examples of a signal equalizer, a first filter stage is configured to perform adaptive equalization of crosstalk between a first signal component and a second signal component of a complex signal. A second filter stage is coupled serially to the first filter stage. The second equalizer stage is configured to perform separate adaptive equalization of the first signal component and separate adaptive equalization of the second signal component.Type: GrantFiled: November 12, 2020Date of Patent: August 22, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Anand Dabak, Mahmoud Abdelmoneim Abdelmoneim Elgenedy, Timothy Mark Schmidl, Swaminathan Sankaran
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Patent number: 11725967Abstract: 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: GrantFiled: May 26, 2020Date of Patent: August 15, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Anand Dabak, Srinivas Lingam
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Patent number: 11438197Abstract: In described examples of a signal equalizer, a complex signal having a first signal component and a second signal component is received from a communication channel. Adaptive equalization of crosstalk between the first signal component and the second signal component is performed using a single complex tap of a feedforward equalizer. A feedforward filter with real only taps converts the channel into a minimum phase channel that has postcursor interference only so that a low complexity decision feedback filter with all complex taps can easily eliminate the postcursor interreference.Type: GrantFiled: November 12, 2020Date of Patent: September 6, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Anand Dabak, Mahmoud Abdelmoneim Abdelmoneim Elgenedy, Timothy Mark Schmidl, Swaminathan Sankaran
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Patent number: 11378686Abstract: 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: GrantFiled: December 26, 2018Date of Patent: July 5, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Lei Ding, Srinath Mathur Ramaswamy, Anand Dabak
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Patent number: 11359947Abstract: 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: GrantFiled: August 12, 2019Date of Patent: June 14, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Anand Dabak, Amardeep Sathyanarayana, Luis Fernando Reynoso, Venkataramanan Ramamurthy
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Patent number: 11353347Abstract: Disclosed examples include methods and systems to measure fluid flow, including a transmit circuit to provide a transducer transmit signal based on a transmit pulse signal, a receive circuit to receive a transducer receive signal, an ADC to sample a receive signal from the receive circuit and provide a sampled signal, and a processing circuit that computes a transit time based on the sampled signal, and provides the transmit pulse signal including a first portion with a frequency in a first frequency band, and a second portion with a second frequency outside the first frequency band to mitigate undesired transducer vibration, where the second frequency is outside a transducer frequency bandwidth of the transducer.Type: GrantFiled: September 19, 2017Date of Patent: June 7, 2022Assignee: Texas Instruments IncorporatedInventors: Anand Dabak, Luis Reynoso Covarrubias, Srinath Ramaswamy, Srinivas Lingam
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Publication number: 20220150093Abstract: In described examples of a signal equalizer, a complex signal having a first signal component and a second signal component is received from a communication channel. Adaptive equalization of crosstalk between the first signal component and the second signal component is performed using a single complex tap of a feedforward equalizer. A feedforward filter with real only taps converts the channel into a minimum phase channel that has postcursor interference only so that a low complexity decision feedback filter with all complex taps can easily eliminate the postcursor interreference.Type: ApplicationFiled: November 12, 2020Publication date: May 12, 2022Inventors: Anand Dabak, Mahmoud Abdelmoneim Abdelmoneim Elgenedy, Timothy Mark Schmidl, Swaminathan Sankaran
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Publication number: 20220149892Abstract: In described examples of a signal equalizer, a first filter stage is configured to perform adaptive equalization of crosstalk between a first signal component and a second signal component of a complex signal. A second filter stage is coupled serially to the first filter stage.Type: ApplicationFiled: November 12, 2020Publication date: May 12, 2022Inventors: Anand Dabak, Mahmoud Abdelmoneim Abdelmoneim Elgenedy, Timothy Mark Schmidl, Swaminathan Sankaran
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Publication number: 20220136878Abstract: 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: ApplicationFiled: January 13, 2022Publication date: May 5, 2022Inventors: Anand Dabak, Venkata Ramanan
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Publication number: 20220120886Abstract: A method for dithering radar frames includes determining at least one of a chirp period Tc for radar chirps in a radar frame and a chirp slope S for radar chirps in the radar frame. In response to determining the chirp period Tc, a maximum chirp dither ?c(max) is determined, and for the radar frame N, a random chirp dither ?c(N) between negative ?c(max) and positive ?c(max) is determined. In response to determining the chirp slope S, a maximum slope dither ?(max) is determined, and for the radar frame N, a random slope dither ?(N) between negative ?(max) and positive ?(max) is determined. A radar sensor circuit generates radar chirps in the radar frame N based on the at least one of (1) the chirp period Tc and the random chirp dither ?c(N) and (2) the chirp slope S and the random slope dither ?(N).Type: ApplicationFiled: September 17, 2021Publication date: April 21, 2022Inventors: Sandeep RAO, Anand DABAK
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Publication number: 20220091216Abstract: 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: ApplicationFiled: November 30, 2021Publication date: March 24, 2022Inventors: Anand DABAK, Marius MOE, Charles SESTOK
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Patent number: 11255708Abstract: 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: GrantFiled: August 31, 2020Date of Patent: February 22, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Anand Dabak, Venkata Ramanan
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Publication number: 20210266039Abstract: 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: ApplicationFiled: May 10, 2021Publication date: August 26, 2021Inventors: Badri N Varadarajan, Anand Dabak, II Han Kim
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Patent number: 11005530Abstract: 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: GrantFiled: January 16, 2020Date of Patent: May 11, 2021Assignee: Texas Instruments IncorporatedInventors: Badri N Varadarajan, Anand Dabak, Il Han Kim
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Patent number: 10955273Abstract: 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: GrantFiled: January 15, 2014Date of Patent: March 23, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Anand Dabak, Venkata Ramanan
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Publication number: 20200400472Abstract: 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: ApplicationFiled: August 31, 2020Publication date: December 24, 2020Inventors: Anand Dabak, Venkata Ramanan