Patents Assigned to Zavod za Elektronni Preobrazuvatelni Elementi
  • Electrostatic acoustic converter with stationary electrode having a progressively increasing surface resistance
    Patent number: 4703509
    Abstract: An electrostatic acoustic converter having two parallel, insulating perforated plates, the inner surfaces of which are covered by electrically resistive layers, each having a signal terminal for connection to a source of sound frequency signals. Between the plates there is fixed a flexible plastic diaphragm isolated from the layers and having a terminal for connection to a source of polarizing voltage.
    Type: Grant
    Filed: June 19, 1985
    Date of Patent: October 27, 1987
    Assignee: Zavod za Elektronni Preobrazuvatelni Elementi
    Inventor: Peter K. Kanchev