Patents by Inventor Madhusudhan R. Penugonda

Madhusudhan R. Penugonda 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).

  • Secure scan
    Patent number: 7672452
    Abstract: According to the invention, a circuit that is capable of automated scan testing is disclosed. Included in the circuit are a cryptographic engine, a digital circuit, an input pin, and an output pin. The cryptographic engine capable of performing at least one of encryption and decryption of one or more digital signals. The digital circuit includes combinatorial logic and a number of memory cells. The memory cells have scan inputs connected serially in a scan chain. The input pin and output pin are coupled to the scan chain. At least one of the input pin and the output pin carries at least some cipher text data of the scan chain.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: March 2, 2010
    Assignee: General Instrument Corporation
    Inventors: Madhusudhan R. Penugonda, Michael W. Johnson, Eric J. Sprunk, An Tonthat
  • Secure scan
    Publication number: 20030206627
    Abstract: According to the invention, a circuit that is capable of automated scan testing is disclosed. Included in the circuit are a cryptographic engine, a digital circuit, an input pin, and an output pin. The cryptographic engine capable of performing at least one of encryption and decryption of one or more digital signals. The digital circuit includes combinatorial logic and a number of memory cells. The memory cells have scan inputs connected serially in a scan chain. The input pin and output pin are coupled to the scan chain. At least one of the input pin and the output pin carries at least some cipher text data of the scan chain.
    Type: Application
    Filed: May 1, 2003
    Publication date: November 6, 2003
    Applicant: GENERAL INSTRUMENT CORP.
    Inventors: Madhusudhan R. Penugonda, Michael W. Johnson, Eric J. Sprunk, An Tonthat