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介绍一种带宽很窄的自动跟踪带通滤波器。它的品质因素可以做得较高。由于基准正、余弦信号已数字化,因此稳定性很高。可以应用于低速范围的信号选择。
Introduce a very narrow bandwidth automatic tracking band-pass filter. It’s quality factor can be done higher. Because of the reference positive and cosine signals have been digitized, so the stability is high. It can be applied to signal selection in low speed range.