Patents Examined by Darryl S. Collins
  • Transverse electrical filter operating optically
    Patent number: 5475525
    Abstract: The invention relates to a programmable transverse filter required for the matched filtering of signals with very wide passband. The signals to be filtered modulate one or more optical carriers (F1) in a modulator (MOD). Each carrier is distributed over several channels by a distributor (DIV). A delay creation circuit (CR1 to CRn) is provided in each channel. These channels are next summed after having been correctly delayed and assigned a coefficient characteristic of the signal to be detected.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: December 12, 1995
    Assignee: Thomson-CSF
    Inventors: Pierre Tournois, Daniel Dolfi, Jean-Pierre Huignard