| 摘要 |
A signal generator, a signal generating method, and an RF communication system adopting the same are provided to simply change the frequency band of an outputted chaotic signal by changing the filtering band of a BPF used as a filter. First to third amplifiers(31,33,35) are connected in a ring shape. A coupler(37) is disposed in the ring to form a closed loop together with the first to third amplifiers(31,33,35), feeds back a portion of a signal to at least one of the first to third amplifiers(31,33,35), and outputs signals formed by the first to third amplifiers(31,33,35). The first amplifier(31) receives a signal from the coupler and amplifies it at a certain amplification ratio. The second amplifier(33) receives an amplified signal from the first amplifier(31) and generates a harmonic component of a frequency. The third amplifier(35) clips a signal from the second amplifier(33) to a certain level.
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