Modulators – Frequency modulator
Reexamination Certificate
2007-09-11
2007-09-11
Kinkead, Arnold (Department: 2817)
Modulators
Frequency modulator
C332S127000, C455S260000, C455S323000, C455S315000, C375S307000, C375S295000, C331S002000, C331S046000
Reexamination Certificate
active
11312327
ABSTRACT:
A frequency generator is provided. The generator comprises two voltage controlled oscillators generating a first signal of a given multiple of a predetermined raster frequency, and a second signal of another given multiple of a predetermined raster frequency, dividers dividing the output signal of the oscillator until the frequency of both divided output signals is equal to the raster frequency, a filter arrangement connected to the output of the dividers, and a single sideband mixer. The mixer produces as output a signal having a frequency which is equal to the frequency of the output signal of either one of the oscillators or to the frequency of the output signal of either one of the oscillators from which the output signal of the filter arrangement has been subtracted or to which the output signal of the filter arrangement has been added.
REFERENCES:
patent: 5307029 (1994-04-01), Schenk
patent: 1 469 373 (2004-10-01), None
patent: 2005/074152 (2005-08-01), None
patent: 2006/065031 (2006-06-01), None
Batra A. et al., “Design of a Multiband OFDM System for Realistic UWB Channel Environments”, IEEE Trans. On Microwave Theory Techniques, vol. 52, No. 9, Sep. 2004, pp. 2123-2138.
Hollingsworth & Funk LLC
Kinkead Arnold
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