Patents Examined by Mitchell Safflan
  • Adjustable aperture correction system
    Patent number: 4021848
    Abstract: A signal receiver having a source of video signals includes an aperture correction system wherein an electron device coupled to the video signal source provides first and second oppositely-phased output signals which are applied to a circuit means to be differentiated and delayed respectively and applied to a summing terminal with desired preshoot and overshoot characteristics. Moreover, these characteristics are selectable by an adjustable impedance coupled to the circuit means providing the differentiated and delayed signals.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: May 3, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: Gopal Krishna Srivastava, Robert Charles Wheeler