Patents by Inventor Bernd Neidermeier

Bernd Neidermeier 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).

  • Method and apparatus for protecting designs in SRAM-based programmable logic devices
    Patent number: 7484081
    Abstract: Various techniques for controlling use of configuration data for and/or a design implemented as user logic in a configurable PLD (programmable logic device) include programming the configurable PLD using configuration data provided by a secure device. The programmed configurable PLD includes user logic, a configurable device authorization code generator and a comparator. The user logic is immediately disabled after it is loaded into the configurable device. A configurable device authorization code is generated in the configurable device authorization code generator in the programmed configurable PLD and is sent to the comparator. A secure device authorization code is generated by a secure device authorization code generator and also is sent to the comparator. The comparator compares the two inputs and, if the configurable device authorization code and secure device authorization code are identical, the user logic is then enabled.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: January 27, 2009
    Assignee: Altera Corporation
    Inventors: Martin Langhammer, Gregory R. Steinke, Guy R. Schlacter, Bernd Neidermeier