搜索 - 科创

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从此式可见电路的输入阻抗是Re的1+β倍，电路的输出阻抗等于Rc与Re的并联总阻抗.经上述分析得出结论：晶体管射随电路具有较高的输入阻抗和较低的输出阻抗。

胶片特性曲线 d.吸收曲线　　41.胶片特性曲线上，过两个特定黑度点的直线斜率的大小是用来衡量（c）　　a.工件反差 b.底片反差 c.胶片反差 d.灵敏度　　42.胶片的密度和曝光量之间的关系常用特性曲线来分析

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