Patents by Inventor Carl J. Palmucci

Carl J. Palmucci 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).

  • Patent number: 4984146
    Abstract: This invention provides a means for suppressing radiated electromagnetic radiation in high current AC/DC power supplies. This radiation is the result of rectifier diode transient noise which is propagated through the electrical network of the power supply. The transient noise is propagated through the electrical and mechanical connections of the diodes to the transformer secondary. These connections have stray impedance which allows high frequency noise to be propagated through them. The stray impedances can be modulated to suppress the high frequency noise propagation without adding discrete inductor or capacitor elements to the electrical network. The modulation of the stray impedances is accomplished by adjusting the current sharing between rectifier diodes. This is accomplished by splitting the parallel connection between rectifier diodes, and making the connection of the diodes to the transformer secondary at various points along the secondary.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: January 8, 1991
    Assignee: International Business Machines Corporation
    Inventors: Arthur G. Black, John R. Mazzuca, Carl J. Palmucci, Surya K. Rao