Patents by Inventor Sivaraman Chokkalingam

Sivaraman Chokkalingam 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: 8638122
    Abstract: A metastability-hardened storage circuit includes at least one inverting circuit. The inverting circuit has a logical input. The logical input of the inverting circuit is split into a pair of physical inputs.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: January 28, 2014
    Assignee: Altera Corporation
    Inventors: Bruce B. Pedersen, Sivaraman Chokkalingam
  • Publication number: 20110193593
    Abstract: A metastability-hardened storage circuit includes at least one inverting circuit. The inverting circuit has a logical input. The logical input of the inverting circuit is split into a pair of physical inputs.
    Type: Application
    Filed: April 18, 2011
    Publication date: August 11, 2011
    Inventors: Bruce B. Pedersen, Sivaraman Chokkalingam
  • Patent number: 7928768
    Abstract: A metastability-hardened storage circuit includes at least one inverting circuit. The inverting circuit has a logical input. The logical input of the inverting circuit is split into a pair of physical inputs.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: April 19, 2011
    Assignee: Altera Corporation
    Inventors: Bruce B. Pedersen, Sivaraman Chokkalingam
  • Publication number: 20110074466
    Abstract: A metastability-hardened storage circuit includes at least one inverting circuit. The inverting circuit has a logical input. The logical input of the inverting circuit is split into a pair of physical inputs.
    Type: Application
    Filed: September 28, 2009
    Publication date: March 31, 2011
    Inventors: Bruce B. Pedersen, Sivaraman Chokkalingam
  • Patent number: 7733815
    Abstract: A data sampler including a first stage and a second stage. The first stage is configured to receive differential signals and provide a first edge rate in a first output signal and a second edge rate in a second output signal based on the differential signals. The second stage is configured to amplify the difference between the first output signal and the second output signal to provide regenerated output signals. The second stage provides a third edge rate in a first internal signal and a fourth edge rate in a second internal signal based on the first edge rate and the second edge rate.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: June 8, 2010
    Assignee: Qimonda AG
    Inventors: Karthik Gopalakrishnan, Luca Ravezzi, Sivaraman Chokkalingam, Edoardo Prete, Hamid Partovi
  • Publication number: 20090180335
    Abstract: One embodiment provides an integrated circuit including a first circuit and a second circuit. The first circuit is configured to obtain a sample of a first clock via a second clock and provide a selected clock from multiple clocks based on the sample. The second circuit is configured to provide a first pointer clock based on the first clock and a second pointer clock based on the selected clock. An edge of the second pointer clock relative to an edge of the first pointer clock is limited to an uncertainty range of within one-half a first pointer clock cycle.
    Type: Application
    Filed: January 15, 2008
    Publication date: July 16, 2009
    Inventors: Sivaraman Chokkalingam, Hamid Partovi, Luca Ravezzi
  • Publication number: 20080024215
    Abstract: A data sampler including a first stage and a second stage. The first stage is configured to receive differential signals and provide a first edge rate in a first output signal and a second edge rate in a second output signal based on the differential signals. The second stage is configured to amplify the difference between the first output signal and the second output signal to provide regenerated output signals. The second stage provides a third edge rate in a first internal signal and a fourth edge rate in a second internal signal based on the first edge rate and the second edge rate.
    Type: Application
    Filed: July 28, 2006
    Publication date: January 31, 2008
    Inventors: Karthik Gopalakrishnan, Luca Ravezzi, Sivaraman Chokkalingam, Edoardo Prete, Hamid Partovi
  • Patent number: 7061337
    Abstract: An amplitude control circuit comprises a first circuit configured to receive differential signals and provide a first signal based on the amplitudes of the differential signals, a second circuit configured to receive a bias signal and provide a second signal based on the bias signal, and a third circuit configured to provide bias to the first circuit and the bias signal to the second circuit. The bias signal is set to provide selected amplitudes of the differential signals.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: June 13, 2006
    Assignee: Infineon Technologies AG
    Inventors: Hamid Partovi, Sivaraman Chokkalingam, Karthik Gopalakrishnan
  • Publication number: 20060012447
    Abstract: An amplitude control circuit comprises a first circuit configured to receive differential signals and provide a first signal based on the amplitudes of the differential signals, a second circuit configured to receive a bias signal and provide a second signal based on the bias signal, and a third circuit configured to provide bias to the first circuit and the bias signal to the second circuit. The bias signal is set to provide selected amplitudes of the differential signals.
    Type: Application
    Filed: July 14, 2004
    Publication date: January 19, 2006
    Inventors: Hamid Partovi, Sivaraman Chokkalingam, Karthik Gopalakrishnan