| 摘要 |
A detector for detecting information carried by a signal having a sawtooth-like shape. The detector includes a first band-pass filter with center frequency around a first frequency value for filtering the signal and generating a first filtered signal, a second band-pass filter with center frequency around a second frequency value for filtering the signal and generating a second filtered signal, a first comparator for comparing the first filtered signal with a reference level and generating a first compared signal, a second comparator for comparing the second filtered signal with the reference level and generating a second compared signal, a clock generator for generating a reference clock having a frequency close to the first frequency value according to the second compared signal, and a detection module for generating a bit signal representing the information according to the first compared signal and the reference clock.
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