Patents by Inventor Prem Swaroop

Prem Swaroop 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).

  • Patent number: 9762256
    Abstract: Systems and methods are provided for digital-to-analog converters (DACs) with enhanced dynamic element matching (DEM) and calibration. DEM may be adapted based on assessment of one or more conditions that may affect the DACs or DEM functions thereof. The one or more condition may comprise amount of signal backoff. The adaption may comprise switching the DEM function (as a whole, or partially—e.g., individual DEM elements) on or off based on the assess conditions. The DACs may incorporate use of calibration. The DEM and/or the calibration may be applied to only a portion of the DAC, such as a particular segment (e.g., a middle segment comprising bits between the MSBs and the LSBs).
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: September 12, 2017
    Assignee: MAXLINEAR, INC.
    Inventors: Gaurav Chandra, Tao Zeng, Shantha Murthy Prem Swaroop
  • Patent number: 9705541
    Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform to be amplified by a programmable gain amplifier (PGA); generating a distortion signal utilizing a PGA model that predicts an output signal of the PGA based on the original waveform; generating an error signal by subtracting out the original waveform from the distortion signal; filtering the generated error signal; generating a conditioned waveform with crest factor reduced from that of the original waveform by adding the filtered error signal to the original waveform; and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The generating of the conditioned waveform may be iterated. The distortion signal may be generated based on a predistortion model. A signal may be fed back from an output of the PGA to the predistortion model, which may be dynamically configured.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: July 11, 2017
    Assignee: Maxlinear, Inc.
    Inventors: Ramesh Sridhar, Timothy Gallagher, Shantha Murthy Prem Swaroop, Ali Shahed Hagh Gadam
  • Patent number: 9692435
    Abstract: Systems and methods are provided for digital-to-analog converter (DAC) with digital offsets. A digital offset may be applied to an input of a digital-to-analog converter (DAC), and digital-to-analog conversions are then applied via the DAC to the input with the digital offset. The digital offset is set to account for one or more conditions relating to inputs to the DAC, with the one or more conditions affect switching characteristics of one or more of a plurality of conversion elements in the DAC, and where each conversion element handles a particular bit in inputs to the DAC. The digital offset may be determined dynamically and adaptively, such as based on the input and/or conditions relating to the input. Alternatively, the digital offset may be pre-determined and fixed. One or more adjustments may be selectively applied to the digital offset for particular input conditions.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: June 27, 2017
    Assignee: MAXLINEAR, INC.
    Inventors: Gaurav Chandra, Tao Zeng, Shantha Murthy Prem Swaroop, Jianyu Zhu
  • Publication number: 20170041090
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Application
    Filed: October 19, 2016
    Publication date: February 9, 2017
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shanta Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Patent number: 9509422
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: November 29, 2016
    Assignee: MAXLINEAR, INC.
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shanta Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Publication number: 20160308546
    Abstract: Systems and methods are provided for digital-to-analog converter (DAC) with partial constant switching. A digital-to-analog converter (DAC) comprising a plurality of conversion elements may be configured to apply constant switching in only some of the conversion elements. Only conversion elements applying constant switching may incorporate circuitry for providing such the constant switching. Alternatively, each conversion element may incorporate constant switching circuitry and functionality, and the constant switching may then be turned on or off for each conversion element adaptively, such as based on input conditions.
    Type: Application
    Filed: April 15, 2016
    Publication date: October 20, 2016
    Inventors: Gaurav Chandra, Tao Zeng, Shantha Murthy Prem Swaroop, Jianyu Zhu
  • Publication number: 20160308547
    Abstract: Systems and methods are provided for digital-to-analog converter (DAC) with digital offsets. A digital offset may be applied to an input of a digital-to-analog converter (DAC), and digital-to-analog conversions are then applied via the DAC to the input with the digital offset. The digital offset is set to account for one or more conditions relating to inputs to the DAC, with the one or more conditions affect switching characteristics of one or more of a plurality of conversion elements in the DAC, and where each conversion element handles a particular bit in inputs to the DAC. The digital offset may be determined dynamically and adaptively, such as based on the input and/or conditions relating to the input. Alternatively, the digital offset may be pre-determined and fixed. One or more adjustments may be selectively applied to the digital offset for particular input conditions.
    Type: Application
    Filed: April 15, 2016
    Publication date: October 20, 2016
    Inventors: Gaurav Chandra, Tao Zeng, Shantha Murthy Prem Swaroop, Jianyu Zhu
  • Publication number: 20160308545
    Abstract: Systems and methods are provided for digital-to-analog converters (DACs) with enhanced dynamic element matching (DEM) and calibration. DEM may be adapted based on assessment of one or more conditions that may affect the DACs or DEM functions thereof. The one or more condition may comprise amount of signal backoff. The adaption may comprise switching the DEM function (as a whole, or partially—e.g., individual DEM elements) on or off based on the assess conditions. The DACs may incorporate use of calibration. The DEM and/or the calibration may be applied to only a portion of the DAC, such as a particular segment (e.g., a middle segment comprising bits between the MSBs and the LSBs).
    Type: Application
    Filed: April 15, 2016
    Publication date: October 20, 2016
    Inventors: Gaurav Chandra, Tao Zeng, Shantha Murthy Prem Swaroop
  • Publication number: 20160248458
    Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform to be amplified by a programmable gain amplifier (PGA); generating a distortion signal utilizing a PGA model that predicts an output signal of the PGA based on the original waveform; generating an error signal by subtracting out the original waveform from the distortion signal; filtering the generated error signal; generating a conditioned waveform with crest factor reduced from that of the original waveform by adding the filtered error signal to the original waveform; and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The generating of the conditioned waveform may be iterated. The distortion signal may be generated based on a predistortion model. A signal may be fed back from an output of the PGA to the predistortion model, which may be dynamically configured.
    Type: Application
    Filed: April 28, 2016
    Publication date: August 25, 2016
    Inventors: Ramesh Sridhar, Timothy Gallagher, Shantha Murthy Prem Swaroop, Ali Shahed Hagh Gadam
  • Publication number: 20160129074
    Abstract: Disclosed herein are methods of formulating cyclosporin A Form 2.
    Type: Application
    Filed: January 14, 2016
    Publication date: May 12, 2016
    Inventors: Anuradha V. Gore, Prem Swaroop Mohanty, E. Quinn Farnes
  • Patent number: 9331725
    Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform, generating a distortion signal by reducing a crest factor of the original waveform, generating an error signal by subtracting out the original waveform from the distortion signal, generating a conditioned waveform by adding the error signal to the original waveform, and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The crest factor of the original waveform may be reduced using a limiter. The power amplifier may comprise a programmable gain amplifier (PGA). The distortion signal may be generated based on a PGA model and/or a predistortion model. A signal from an output of the PA may be fed back to the PGA model. The PGA model may be dynamically configured. The crest factor of the original waveform may be reduced in an analog domain and/or a digital domain. The error signal may be filtered utilizing a distortion shaping filter.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: May 3, 2016
    Assignee: Maxlinear, Inc.
    Inventors: Ramesh Sridhar, Timothy Gallagher, Ali Shahed hagh Ghadam, Shantha Murthy Prem Swaroop
  • Publication number: 20160080098
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Application
    Filed: November 23, 2015
    Publication date: March 17, 2016
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shanta Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Patent number: 9238002
    Abstract: Disclosed herein are methods of formulating cyclosporin A Form 2.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: January 19, 2016
    Assignee: Allergan, Inc.
    Inventors: Anuradha V. Gore, Prem Swaroop Mohanty, E. Quinn Farnes
  • Patent number: 9203535
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: December 1, 2015
    Assignee: MaxLinear, Inc.
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shanta Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Publication number: 20150194932
    Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform, generating a distortion signal by reducing a crest factor of the original waveform, generating an error signal by subtracting out the original waveform from the distortion signal, generating a conditioned waveform by adding the error signal to the original waveform, and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The crest factor of the original waveform may be reduced using a limiter. The power amplifier may comprise a programmable gain amplifier (PGA). The distortion signal may be generated based on a PGA model and/or a predistortion model. A signal from an output of the PA may be fed back to the PGA model. The PGA model may be dynamically configured. The crest factor of the original waveform may be reduced in an analog domain and/or a digital domain. The error signal may be filtered utilizing a distortion shaping filter.
    Type: Application
    Filed: January 5, 2015
    Publication date: July 9, 2015
    Inventors: Ramesh Sridhar, Timothy Gallagher, Ali Shahed hagh Ghadam, Shantha Murthy Prem Swaroop
  • Publication number: 20140322335
    Abstract: Disclosed herein are methods of formulating cyclosporin A Form 2.
    Type: Application
    Filed: July 7, 2014
    Publication date: October 30, 2014
    Inventors: Anuradha V. Gore, Prem Swaroop Mohanty, E. Quinn Farnes
  • Patent number: 8796222
    Abstract: Disclosed herein are methods of formulating cyclosporin A Form 2.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: August 5, 2014
    Assignee: Allergan, Inc.
    Inventors: Anuradha Gore, Prem Swaroop Mohanty, E. Quinn Farnes
  • Patent number: 8660821
    Abstract: A method for use in designing a utility network to provide a utility to a geographic area. A computer system determines a demand point within the geographic area at which to provide the utility. The computer system also determines a source point to provide the utility to the utility network. A connection path through the geographic area is determined, connecting the source point to the demand point. In addition, a bill of materials may be generated, indicating a set of equipment required to convey the utility from the source point to the demand point along the determined connection path.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: February 25, 2014
    Assignee: General Electric Company
    Inventors: Kavitha Andoji, Bhargav J. Oza, Bhaskar Praveen Vepakomma, Prem Swaroop Sadineedi
  • Publication number: 20130230078
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 5, 2013
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shanta Murthy Prem Swaroop, Curtis Ling
  • Publication number: 20130122059
    Abstract: Disclosed herein are methods of formulating cyclosporin A Form 2.
    Type: Application
    Filed: November 14, 2012
    Publication date: May 16, 2013
    Applicant: ALLERGAN, INC.
    Inventors: Anuradha Gore, Prem Swaroop Mohanty, E. Quinn Farnes