Inventors:
Richard Y. Chang - Brooklyn NY, US
Assignee:
Altera Corporation - San Jose CA
International Classification:
H03K 19/177, G06F 12/14
Abstract:
Methods and system for achieving improved copyright protection for programmable logic devices are disclosed. One preferred embodiment comprises a programmable logic device comprising a programmable element programmed by a mutated programming pattern, said mutated programming pattern causing the PLD to generate a mutated output; and a circuit element that translates the mutated output into a normal output.