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Electrical, Automated And Cables

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Step Recovery Diodes:

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階躍恢復(fù)二極管（Step-Recovary Diode）：它與快恢復(fù)二極管有所不同，其主要特點(diǎn)是關(guān)斷時(shí)的下降時(shí)間tf幾乎為0（為ps數(shù)量級(jí)），但是，其存儲(chǔ)時(shí)間ts卻比較長(zhǎng)。而快恢復(fù)二極管這種高速開關(guān)管的存儲(chǔ)時(shí)間和下降時(shí)間都很短，所以其總的反向恢復(fù)時(shí)間很短。不過(guò)，在實(shí)現(xiàn)很短的反向恢復(fù)時(shí)間中所采取的措施，主要是著眼于減短存儲(chǔ)時(shí)間，而下降時(shí)間還往往對(duì)開關(guān)性能有著一定的影響（即關(guān)斷時(shí)的反向電流波形有一定的拖尾）。