Patents by Inventor Peter Robert Norman Stephenson

Peter Robert Norman Stephenson 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).

  • Noise and drift correcting amplifier circuit for a live-scan imaging system
    Patent number: 4036763
    Abstract: In an imaging system, a radiation detector which scans an image has it output amplified by a D.C. preamplifier and to neutralize low frequency noise and drift the preamplifier output is amplified by a further D.C. amplifier having a feedback capacitor and to which a reference voltage is applied the further amplifier output being applied as a second input to the preamplifier. A sample and hold switch controls the application of the preamplifier output to the further amplifier, this switch being closed only during the dead times between consecutive scan lines.
    Type: Grant
    Filed: August 11, 1975
    Date of Patent: July 19, 1977
    Assignee: Hawker Siddeley Dynamics Limited
    Inventor: Peter Robert Norman Stephenson