Patents by Inventor Edward D. Anwyl

Edward D. Anwyl 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).

  • Line scan circuits for cathode ray tube displays
    Patent number: 4283662
    Abstract: A line scan circuit for a cathode ray tube display includes a phase detector (3), integrator (4), voltage controlled oscillator (5) and line output stage (6). The integrator, voltage controlled oscillator and line output stage are conventional, but the phase detector is novel. The phase detector compares the phase difference for both the leading and trailing edges of the horizontal synchronization pulses and the line flyback pulses. This forces the line flyback pulses to be centered with respect to the synchronization pulses resulting in improved centering and linearity of the displayed picture.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: August 11, 1981
    Assignee: International Business Machines Corporation
    Inventors: Frank Ainscow, Edward D. Anwyl