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变容二极管在电路中使用时，其PN结是？

2025-03-28 08:49:19

推荐回答（2个）

回答1：

变容二极管在电路中工作时，PN结上是加的反向电压。当这反向电压的大小改变时，PN结的宽度会发生改变，从而结电容也发生变化。
例如：在电调谐高频头中用于改变本振频率的电路中作用的二极管两端的反向电压在0~-30V间变化。

回答2：

反偏

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