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一例發射極跟隨器繼電器開關電路的工作原理分析

發布日期：2022-04-28 點擊率：62

發射極跟隨器繼電器開關電路

電路圖如下所示：

一例發射極跟隨器繼電器開關電路的工作原理分析

除了繼電器開關電路的標準通用發射極配置外，繼電器線圈還能連接到晶體管的發射極端子，以形成發射極跟隨器電路。輸入信號直接連接到基座，輸出信號從發射器負載獲取。

公共收集器或發射極跟隨器配置對于阻抗匹配有重要作用，其輸入阻抗非常高，在數十萬歐姆的范圍內，同時有相對較低的輸出阻抗來切換繼電器線圈。

與以前的NPN繼電器開關電路一樣，通過向晶體管的基極施加正電流來實現開關功能。

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