Patents by Inventor David B. Doak

David B. Doak 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).

  • Digital circuitry for noise blanking
    Patent number: 5521550
    Abstract: A logic circuit and logic sequence cooperating with a PWM circuit to blank unwanted noise signals trailing a PWM pulse.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: May 28, 1996
    Assignee: AT&T Corp.
    Inventor: David B. Doak
  • Method and apparatus for nonlinear compensation
    Patent number: 5512856
    Abstract: A method and apparatus for compensating for nonlinear responses of capacitive loads using a load reference element.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: April 30, 1996
    Assignee: AT&T Corp.
    Inventor: David B. Doak