Double frequency-shift keying modulating device
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United States of America Patent
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Dec 26, 2017
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app pub date -
Aug 21, 2016
filing date -
Dec 24, 2015
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Abstract
A double frequency-shift keying modulating device includes a modulation module. The modulation module receives an oscillating signal and a digital signal, and generates a modulation output signal that has a first frequency. The first frequency is associated with a frequency of the oscillating signal and varies periodically at a second frequency. The second frequency is associated with the digital signal and the frequency of the oscillating signal.
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