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用作自動音頻限幅二極管

作者：時間：2016-11-12 來源：網絡

如圖是由限幅二極管D和電阻R2組成的自動音頻限幅器原理圖。當無信號輸入時，有小電流I自地向流經R1，R2，R3，R4到電源負端。此電流在電阻R上產生約

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