Patents Examined by M. Nussbaum
  • Filter circuits having transformers as filter elements
    Patent number: 4409569
    Abstract: Filter circuits of the type having inductance and capacitance elements, wherein the number of magnetic components is reduced by using two transformers to perform the functions of four individual inductors. Each transformer has one end of the primary winding connected to one end of the secondary winding, and a pi or T equivalent circuit in which one of the inductance values is equal in magnitude and opposite in sign to a corresponding equivalent circuit inductance value of the other transformer.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: October 11, 1983
    Assignee: OPT Industries, Inc.
    Inventor: Jerome Potash