Patents by Inventor Niranjan Anand Talwalkar
Niranjan Anand Talwalkar 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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Patent number: 9831960Abstract: A method for inductively coupled communication is described. The method includes generating a first signal. The first signal frequency is a first integer multiple of a carrier frequency for inductively coupled communication. The method also includes selecting between a standalone mode and a coexistence mode. The method further includes dividing the first signal to obtain a second signal when in standalone mode. The second signal frequency is a second integer multiple of the carrier frequency. The method additionally includes dividing the first signal to obtain a third signal when in coexistence mode. The third signal frequency is a third integer multiple of the carrier frequency. The method also includes generating an inductively coupled communication signal using at least one of the second signal and the third signal.Type: GrantFiled: December 5, 2014Date of Patent: November 28, 2017Assignee: QUALCOMM IncorporatedInventors: Mohammad Mahdi Ghahramani, Mazhareddin Taghivand, Rainer Gaethke, Niranjan Anand Talwalkar, Roger Brockenbrough
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Patent number: 9756578Abstract: A method for inductively coupled communication is described. The method includes transmitting a carrier signal from a first device while receiving the carrier signal at a receiver of the first device. The method also includes determining a carrier level estimation using a loopback path on the receiver of the first device. The method further includes controlling a transmit power level of the first device based on a coupling strength with a second device as indicated by the carrier level estimation.Type: GrantFiled: April 10, 2015Date of Patent: September 5, 2017Assignee: QUALCOMM IncorporatedInventors: Angelica Wong, Haitao Gan, Rainer Gaethke, Niranjan Anand Talwalkar
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Patent number: 9722729Abstract: A powerline communication (PLC) device can be configured to execute functionality for zero cross sampling and detection. When the PLC device is directly coupled to a high-voltage PLC network, the PLC device can comprise printed safety capacitors in series with a high-voltage input AC powerline signal to safely couple the high-voltage AC powerline signal to the low-voltage processing circuit. The PLC device can also comprise an ADC to sample a scaled AC powerline signal and to obtain zero cross information. When the PLC device is part of an embedded PLC application, dynamic loading can affect the integrity of a low voltage zero cross signal that is used to extract zero cross information. After digitizing the zero cross signal, the PLC device can execute functionality to minimize/eliminate voltage drops caused by dynamic loading and obtain the zero cross information.Type: GrantFiled: September 30, 2013Date of Patent: August 1, 2017Assignee: QUALCOMM IncorporatedInventors: Gregory Allen Magin, Faisal Mahmood Shad, Lawrence Winston Yonge, III, Sanjay Kasturia, Niranjan Anand Talwalkar
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Patent number: 9673964Abstract: An example method for active load modulation includes determining a modulated portion and an unmodulated portion of a bit. Further, the example method includes during the modulated portion of the bit, holding a phase of a received carrier signal. In addition, the example method includes, during the unmodulated portion of the bit, synchronizing to the received carrier signal.Type: GrantFiled: February 18, 2015Date of Patent: June 6, 2017Assignee: QUALCOMM IncorporatedInventors: Mohammad Mahdi Ghahramani, Mazhareddin Taghivand, Niranjan Anand Talwalkar
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Publication number: 20160302159Abstract: A method for inductively coupled communication is described. The method includes transmitting a carrier signal from a first device while receiving the carrier signal at a receiver of the first device. The method also includes determining a carrier level estimation using a loopback path on the receiver of the first device. The method further includes controlling a transmit power level of the first device based on a coupling strength with a second device as indicated by the carrier level estimation.Type: ApplicationFiled: April 10, 2015Publication date: October 13, 2016Inventors: Angelica Wong, Haitao Gan, Rainer Gaethke, Niranjan Anand Talwalkar
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Publication number: 20160241380Abstract: An example method for active load modulation includes determining a modulated portion and an unmodulated portion of a bit. Further, the example method includes during the modulated portion of the bit, holding a phase of a received carrier signal. In addition, the example method includes, during the unmodulated portion of the bit, synchronizing to the received carrier signal.Type: ApplicationFiled: February 18, 2015Publication date: August 18, 2016Inventors: Mohammad Mahdi GHAHRAMANI, Mazhareddin TAGHIVAND, Niranjan Anand TALWALKAR
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Publication number: 20160164617Abstract: A method for inductively coupled communication is described. The method includes generating a first signal. The first signal frequency is a first integer multiple of a carrier frequency for inductively coupled communication. The method also includes selecting between a standalone mode and a coexistence mode. The method further includes dividing the first signal to obtain a second signal when in standalone mode. The second signal frequency is a second integer multiple of the carrier frequency. The method additionally includes dividing the first signal to obtain a third signal when in coexistence mode. The third signal frequency is a third integer multiple of the carrier frequency. The method also includes generating an inductively coupled communication signal using at least one of the second signal and the third signal.Type: ApplicationFiled: December 5, 2014Publication date: June 9, 2016Inventors: Mohammad Mahdi Ghahramani, Mazhareddin Taghivand, Rainer Gaethke, Niranjan Anand Talwalkar, Roger Brockenbrough
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Patent number: 9197172Abstract: A switched mode, high linearity power amplifier can include a dynamic quantizer, a pulse width modulator and an output driver. In one embodiment, the dynamic quantizer can include a sigma-delta modulator configured to provide a multi-level digital signal. The pulse width modulator can receive the multi-level digital signal and provide a variable pulse width signal based, at least in part, on the multi-level digital signal. The output driver can include a class D output driver. The output driver can receive the variable pulse width signal to operate the class D output driver and provide an amplified signal. In one embodiment, the output driver can adjust the amplified signal to compensate for output errors.Type: GrantFiled: September 17, 2013Date of Patent: November 24, 2015Assignee: QUALCOMM IncorporatedInventors: Niranjan Anand Talwalkar, Sanjay Kasturia
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Patent number: 9166577Abstract: A clock modulator can include two configurable delay units and can receive a baseband signal and a clock signal. The two configurable delay units can generate two delayed clock signals, each with different delay amounts. The delay amounts can be based on the baseband signal. The delayed clock signals can be combined to generate a modulated clock signal. A quadrature modulated clock signal can be generated when a first clock modulator receives a first baseband signal and a first clock signal and a second clock modulator receives a second baseband signal and a second clock signal. The first clock signal can be a ninety-degree phase shifted version of the second clock signal. The modulated clock signal from the first clock modulator can be combined with the modulated clock signal from the second clock modulator to generate the quadrature modulated clock signal.Type: GrantFiled: January 29, 2014Date of Patent: October 20, 2015Assignee: QUALCOMM IncorporatedInventors: Niranjan Anand Talwalkar, Sanjay Kasturia
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Publication number: 20150214939Abstract: A clock modulator can include two configurable delay units and can receive a baseband signal and a clock signal. The two configurable delay units can generate two delayed clock signals, each with different delay amounts. The delay amounts can be based on the baseband signal. The delayed clock signals can be combined to generate a modulated clock signal. A quadrature modulated clock signal can be generated when a first clock modulator receives a first baseband signal and a first clock signal and a second clock modulator receives a second baseband signal and a second clock signal. The first clock signal can be a ninety-degree phase shifted version of the second clock signal. The modulated clock signal from the first clock modulator can be combined with the modulated clock signal from the second clock modulator to generate the quadrature modulated clock signal.Type: ApplicationFiled: January 29, 2014Publication date: July 30, 2015Applicant: QUALCOMM IncorporatedInventors: Niranjan Anand Talwalkar, Sanjay Kasturia
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Patent number: 9014300Abstract: A QAM transmitter is disclosed that may reduce the frequency of local clock signals and/or reduce the switching frequency of driver circuits when generating a QAM output signal for transmission. The QAM transmitter may generate a number of PWM signals indicative of in-phase (I) and quadrature (Q) signal components, and then use one or more selected even-order harmonics of the PWM signals to generate the QAM output signal. Odd-order harmonics of the PWM signals may be suppressed by selectively combining the PWM signals, and any remaining unwanted even-order harmonics may be suppressed using filters.Type: GrantFiled: September 12, 2013Date of Patent: April 21, 2015Assignee: QUALCOMM IncorporatedInventors: Niranjan Anand Talwalkar, Sanjay Kasturia
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Publication number: 20150077181Abstract: A switched mode, high linearity power amplifier can include a dynamic quantizer, a pulse width modulator and an output driver. In one embodiment, the dynamic quantizer can include a sigma-delta modulator configured to provide a multi-level digital signal. The pulse width modulator can receive the multi-level digital signal and provide a variable pulse width signal based, at least in part, on the multi-level digital signal. The output driver can include a class D output driver. The output driver can receive the variable pulse width signal to operate the class D output driver and provide an amplified signal. In one embodiment, the output driver can adjust the amplified signal to compensate for output errors.Type: ApplicationFiled: September 17, 2013Publication date: March 19, 2015Applicant: QUALCOMM IncorporatedInventors: Niranjan Anand Talwalkar, Sanjay Kasturia
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Publication number: 20150071338Abstract: A QAM transmitter is disclosed that may reduce the frequency of local clock signals and/or reduce the switching frequency of driver circuits when generating a QAM output signal for transmission. The QAM transmitter may generate a number of PWM signals indicative of in-phase (I) and quadrature (Q) signal components, and then use one or more selected even-order harmonics of the PWM signals to generate the QAM output signal. Odd-order harmonics of the PWM signals may be suppressed by selectively combining the PWM signals, and any remaining unwanted even-order harmonics may be suppressed using filters.Type: ApplicationFiled: September 12, 2013Publication date: March 12, 2015Applicant: QUALCOMM IncorporatedInventors: Niranjan Anand Talwalkar, Sanjay Kasturia
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Publication number: 20140355697Abstract: A powerline communication (PLC) device can be configured to execute functionality for zero cross sampling and detection. When the PLC device is directly coupled to a high-voltage PLC network, the PLC device can comprise printed safety capacitors in series with a high-voltage input AC powerline signal to safely couple the high-voltage AC powerline signal to the low-voltage processing circuit. The PLC device can also comprise an ADC to sample a scaled AC powerline signal and to obtain zero cross information. When the PLC device is part of an embedded PLC application, dynamic loading can affect the integrity of a low voltage zero cross signal that is used to extract zero cross information. After digitizing the zero cross signal, the PLC device can execute functionality to minimize/eliminate voltage drops caused by dynamic loading and obtain the zero cross information.Type: ApplicationFiled: September 30, 2013Publication date: December 4, 2014Applicant: QUALCOMM IncorporatedInventors: Gregory Allen Magin, Faisal Mahmood Shad, Lawrence Winston Yonge, III, Sanjay Kasturia, Niranjan Anand Talwalkar