Patents by Inventor John Choma

John Choma 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).

  • Pre-distortion and memory compensation apparatus
    Patent number: 8229027
    Abstract: Pre-distortion and memory compensation apparatuses and methods for a non-linear component are provided. The apparatus comprises an adaptive block for generating a plurality of correlation coefficients, which are used to weight a plurality of synthesis work functions to pre-distort a given signal. The adaptive block can be driven by an error signal generated from a feedback signal from the non-linear component output signal and a delayed version of the input signal. The apparatus is capable of being operated directly at radio frequency. Also provided are apparatuses and methods for generation of quadrature signals, transconductance amplification employing negative resistance, variable-gain amplification, and envelope detection.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: July 24, 2012
    Assignee: Scintera Networks, Inc.
    Inventors: Arvind Keerthi, Madabusi Govindarajan, P. Vijay Kumar, John Choma, Abhijit Shanbhag
  • PRE-DISTORTION AND MEMORY COMPENSATION APPARATUS
    Publication number: 20110032033
    Abstract: Pre-distortion and memory compensation apparatuses and methods for a non-linear component are provided. The apparatus comprises an adaptive block for generating a plurality of correlation coefficients, which are used to weight a plurality of synthesis work functions to pre-distort a given signal. The adaptive block can be driven by an error signal generated from a feedback signal from the non-linear component output signal and a delayed version of the input signal. The apparatus is capable of being operated directly at radio frequency. Also provided are apparatuses and methods for generation of quadrature signals, transconductance amplification employing negative resistance, variable-gain amplification, and envelope detection.
    Type: Application
    Filed: October 21, 2010
    Publication date: February 10, 2011
    Applicant: SCINTERA NETWORKS, INC.
    Inventors: Arvind Keerthi, Madabusi Govindarajan, P. Vijay Kumar, John Choma, Abhijit Shanbhag
  • Pre-distortion apparatus
    Patent number: 7844014
    Abstract: Pre-distortion apparatuses and methods for a non-linear component are provided. The apparatus comprises an adaptive block for generating a plurality of correlation coefficients, which are used to weight a plurality of synthesis work functions to pre-distort a given signal. The adaptive block can be driven by an error signal generated from a feedback signal from the non-linear component output signal and a delayed version of the input signal. The apparatus is capable of being operated directly at radio frequency. Also provided are apparatuses and methods for generation of quadrature signals, transconductance amplification employing negative resistance, variable-gain amplification, and envelope detection.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: November 30, 2010
    Assignee: Scintera Networks, Inc.
    Inventors: Arvind Keerthi, Madabusi Govindarajan, P. Vijay Kumar, John Choma, Abhijit Shanbhag
  • Pre-distortion apparatus
    Publication number: 20080008263
    Abstract: Pre-distortion apparatuses and methods for a non-linear component are provided. The apparatus comprises an adaptive block for generating a plurality of correlation coefficients, which are used to weight a plurality of synthesis work functions to pre-distort a given signal. The adaptive block can be driven by an error signal generated from a feedback signal from the non-linear component output signal and a delayed version of the input signal. The apparatus is capable of being operated directly at radio frequency. Also provided are apparatuses and methods for generation of quadrature signals, transconductance amplification employing negative resistance, variable-gain amplification, and envelope detection.
    Type: Application
    Filed: July 7, 2006
    Publication date: January 10, 2008
    Inventors: Arvind Keerthi, Madabusi Govindarajan, P. Vijay Kumar, John Choma, Abhijit Shanbhag