Patents by Inventor Guy James Robertson

Guy James Robertson 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).

  • Optoelectronic circuit and control circuit
    Patent number: 6765942
    Abstract: To drive a single-mode laser device using a differential-pair output stage, collector terminals of transistors forming the differential-pair must be maintained at a predetermined potential. Since the potential dropped across the laser device is only about 1V, a Schottky diode connected between a cathode of the laser device and a second supply rail raises the cathode about 0.5V above the voltage of the second supply rail.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: July 20, 2004
    Assignee: Agilent Technologies Inc.
    Inventor: Guy James Robertson
  • Optoelectronic circuit and control circuit
    Publication number: 20020176462
    Abstract: In order to drive a single-mode laser device (126) using a differential-pair output stage (100) it is necessary to maintain collector terminals of transistors forming the differential-pair at a predetermined potential. Since the potential dropped across the laser device (126) is only about 1V, a Schottky diode (124) is provided between a cathode of the laser device (126) and a second supply rail (114) to raise the cathode by about 0.5V above the voltage of the second supply rail (114).
    Type: Application
    Filed: May 28, 2002
    Publication date: November 28, 2002
    Applicant: Agilent Technologies, Inc.
    Inventor: Guy James Robertson