Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
February 24, 2009
Patent Application Number
11835821
Date Filed
August 8, 2007
Patent Primary Examiner
Patent abstract
A frequency-shift modulation device includes an oscillating circuit, a phase-locked loop and a digital frequency modulation circuit. The oscillating circuit is connected to the phase-locked loop in order to produce a fixed-frequency clock signal. This clock signal is used for timing the frequency modulation circuit. A standard model crystal oscillator can be used in the oscillating circuit, given that the RF frequency of a wireless transmission signal which is produced by the modulation device is determined digitally.
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