| 摘要 |
PROBLEM TO BE SOLVED: To provide an FSK demodulation technology that can revise a level of noise amplitude to be eliminated depending on an amplitude level of an input signal. SOLUTION: The FSK demodulation system decides two values with '0' inbetween, that is, a positive level shift and a negative level shift, and compares a level of the input signal with the positive level shift and the negative level shift to demodulate the input signal on the basis of the result of comparison.
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