Patents by Inventor Philippe Le Gars

Philippe Le Gars 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: 4476578
    Abstract: A device for detecting the optimum anode load impedence of a transmitter tube in a high frequency transmission chain. A phase shift circuit phase shifts by k.pi./2 (with k being a positive or negative uneven integer) the phase difference between the input and output voltages of the tube. The phase shifted voltages are multiplying together in a circuit, and the mean value of the product is then calculated. Cancellation of this mean value corresponds to the anode load impedance passing through a purely resistive value. Thus, the circuit allows the phase matching detection to be made, which is independent of any modulus matching detection.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: October 9, 1984
    Assignee: Thomson-CSF
    Inventors: Daniel Gaudin, Philippe Le Gars