Patents by Inventor Mark Steven Schaefer

Mark Steven Schaefer 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).

  • Method and apparatus for monitoring the RF drive circuit of a linear laser transmitter
    Patent number: 5809049
    Abstract: The present invention monitors the RF drive circuitry of a linear laser transmitter. In one preferred embodiment of the present invention, a filtered RF signal from the monitor diode is amplified and then input to a peak detector. The output of the peak detector is then fed to the input of a threshold detector, wherein the threshold detector determines whether the output of the peak detector is above a predetermined threshold. If the output of the peak detector falls below the predetermined threshold an alarm is generated at the status monitoring ports of the laser transmitter.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: September 15, 1998
    Assignee: Lucent Technologies Inc.
    Inventors: Mark Steven Schaefer, David B. Winick