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er ji guan de ying yong dian lu
Author(s): 
Pages: 29-30
Year: Issue:  6
Journal: Family Electronics

Keyword:  变容二极管应用电路次级电压晶体二极管单向导电性直流电源桥式整流电路直流电压稳压电路削波电路;
Abstract: <正> 利用晶体二极管的单向导电性能,可以组成各种用途的应用电路,现把常用电路简介如下。一、桥式整流电路在各种电子设备中都需要直流电源,最常用的整流电路是由四个二极管组成的桥式整流电路,如图1所示。交流电压(例如市电220V)经变压器降压后作用在桥式整流电路上,如变压器次级电压正半周为上正下负,则电流流通的路径为D1—RL—D3,如图中箭头所示;当次级电压为上负下正时,电流的流通路径为D2—RL—D4,不论正半周还是负半周输入,在
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