Patents Assigned to Zenith Electonics Corporation
  • Oscillator for digital ATV signals having low phase noise
    Patent number: 5923221
    Abstract: An oscillator operable in the gigaHertz range includes a transistor having an emitter coupled to a tank circuit and an additional feedback path coupling the tank circuit back to the base of the transistor. The inductive elements of the tank circuit are in printed foil form as is a transmission line that provides the additional feedback path. This arrangement improves the phase noise characteristics of the oscillator while extending its operating frequency range.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: July 13, 1999
    Assignee: Zenith Electonics Corporation
    Inventor: Pierre Dobrovolny
  • Method of screening a flat mask cathode ray tube
    Patent number: 4695523
    Abstract: A method of screening a tensed mask CRT faceplate to correct for color purity errors resulting from screening of the tube through a tension mask whose supporting frame is distorted by the tensile forces exerted by the mask on the frame. The method includes heating the tensed mask during photoscreening of the tube to a temperature sufficient to substantially reduce the strain imparted to the support frame.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: September 22, 1987
    Assignee: Zenith Electonics Corporation
    Inventor: Kazimir Palac