Patents Assigned to Opto Systems, Inc.
  • Bar code reader with diode feedback in amplifier
    Patent number: 4578576
    Abstract: An operational amplifier is disclosed having a phototransistor at its input for reading a bar code wherein the saturation point of an operational amplifier is controlled by a clamping feedback voltage having a positive control controlling the saturation point of the operational amplifier while prohibiting the operational amplifier from reaching its saturation point.
    Type: Grant
    Filed: March 30, 1983
    Date of Patent: March 25, 1986
    Assignee: Opto Systems, Inc.
    Inventors: Jay A. Wheeler, James A. Willmore