Patents by Inventor Christopher M. Maple

Christopher M. Maple 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).

  • Constant Q peaking filter utilizing synthetic inductor and simulated capacitor
    Patent number: 5235223
    Abstract: A tunable circuit is disclosed which allows tuning while maintaining a constant Q. The filter uses a synthetic inductor and a capacitance multiplier in place of discrete inductive and capacitive elements. By coupling the synthetic inductor and capacitance through a variable resistor, means are provided for varying the peaking frequency of the circuit while maintaining a constant Q.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: August 10, 1993
    Assignee: Harman International Industries, Inc.
    Inventor: Christopher M. Maple