For dynamic pre- emphasis and de-emphasis, their frequency characters are opposite Exchange circuits were applied in the references [1~3], ie, in order to get de emphasis,the main emphasis networic and unlinear emphasis network were exchanged.
动态予加重及去加重,频率特性是相反的、文献[1~3]都采用相应的互换电路,即实施去加重是把予加重屯路的主加重网络与非线性加重网络互换。
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