To Or From Electrode Common To Input And Output Patents (Class 330/78)
  • Patent number: 7515646
    Abstract: An improved data signal electromagnetic emissions system is provided for sending data signals over one or more data pathways. An original data signal is encoded into a set of sideband frequencies that exhibit a lower amplitude than the original data signal; then transmitted over the data pathway and later decoded back into a signal having the original data content. The encoding scheme uses a number of modulation pattern sets that each produce a set of sidebands about the data signal's fundamental and certain harmonic frequencies, in a manner that attempts to make the maximum amplitudes for each set of sidebands substantially equal to one another, although this is also dependent upon the data signal's frequency content.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: April 7, 2009
    Assignee: Lexmark International, Inc.
    Inventors: Keith B. Hardin, Robert A. Oglesbee, John P. Richey
  • Patent number: 6909322
    Abstract: Output amplifier stage (1) of a high frequency generator (1) with tube (2) operating in class B or C has its output (5) looped back on the input (4) by means of a coaxial line (31) with a length equal to approximately the wave length corresponding to the operating frequency. The apparent gain of the amplifier stage (1) is thus increased and the output power from an intermediate amplifier (24) can be correspondingly reduced, amplifying a stable signal at the operating frequency.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: June 21, 2005
    Assignee: Electricite de France Service National
    Inventors: Georges Roussy, Michel Moneuse, William Benoit, Bernard Dichtel, Jean-Marie Jacomino
  • Patent number: 3938057
    Abstract: A telecommunications signal amplifier comprising an active tripole the transfer function of which has a negative real portion, the input impedance and the output impedance of which are substantially equal to one another and to the iterative impedance of the line in which the amplifier according to the invention is inserted, a first dipole of defined structure, a second dipole of structure reciprocal to the first with respect to the iterative impedance of the circuit in which the amplifier according to the invention is inserted, characterised in that said signal amplifier is reduced to a tripole by merging an input terminal and an output terminal, the other input terminal is connected to a terminal of said first dipole and to an input terminal of said tripole, the other output terminal is connected to the other terminal of said first dipole and to an output terminal of said tripole, the common input and output terminal of this tripole being joined, by means of said second dipole, to the common input and output
    Type: Grant
    Filed: March 26, 1973
    Date of Patent: February 10, 1976
    Assignee: Societe Anonyme de Telecommunications
    Inventor: Pierre Jean Marie Minot