Patents by Inventor Claude J. Trottier

Claude J. Trottier 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).

  • Large current watchdog circuit for a photodetector
    Patent number: 6525305
    Abstract: A large current watchdog circuit for a photodetector, the circuit including a current sensing device responsive to current flowing through the photodetector and a variable impedance transistor responsive to the current sensing device and the photodetector which increases in resistance in response to current flowing though the photodetector to protect the photodetector and any front end sensing electronics from high current levels.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: February 25, 2003
    Assignee: PerkinElmer Canada, Inc.
    Inventors: Pierre D. Deschamps, Claude J. Trottier
  • Large current watchdog circuit for a photodetector
    Publication number: 20020145107
    Abstract: A large current watchdog circuit for a photodetector, the circuit including a current sensing device responsive to current flowing through the photodetector and a variable impedance transistor responsive to the current sensing device and the photodetector which increases in resistance in response to current flowing though the photodetector to protect the photodetector and any front end sensing electronics from high current levels.
    Type: Application
    Filed: September 7, 2001
    Publication date: October 10, 2002
    Inventors: Pierre D. Deschamps, Claude J. Trottier
  • Active quench circuit for an avalanche current device
    Patent number: 5933042
    Abstract: An active quench circuit for an avalanche current device applies a bias voltage to reverse bias an avalanche current device above its avalanche breakdown voltage; a current amplifier circuit having a turn-off speed slower than the avalanche speed of the avalanche device and responsive to the avalanche current of the avalanche device generates an overshoot current continuing after the end of the avalanche current; and a feedback circuit responsive to the overshoot current generates a quenching voltage for reducing the bias voltage below the avalanche breakdown voltage to quench the avalanche current of the avalanche device.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: August 3, 1999
    Assignee: EG&G Canada, Ltd.
    Inventors: Claude J. Trottier, Pierre D. Deschamps, Bruno Y. Dion, Alain R. Comeau