Patents by Inventor Raymond Filippi

Raymond Filippi 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).

  • Level shifting circuit having a fixed output common mode level
    Patent number: 6191635
    Abstract: The invention relates to an electronic circuit, and in particular embodiments to a level shifting circuit having an output common mode voltage independent of the input common mode voltage, and unity differential signal gain. The circuit receives first and second input voltages, referenced to a first voltage supply rail, and has first and second resistors, each connected to the first input terminal, and third and fourth resistors, each connected to the second input terminal, the second and third resistors having equal resistance values. The first resistor is also connected to a first output terminal, the fourth resistor is also connected to a second output terminal, and the second and third resistors are also connected together at a reference node.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: February 20, 2001
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: John Thompson, Raymond Filippi