【学术论文】反垃圾电子邮件方法研究进展

7.1 软开关的基本概念 7.2 软开关电路的分类 7.3 典型的软开关电路

3.1 基本斩波电路 3.2 复合斩波电路和多相多重斩波电路

7.1锁相环路 7.2集成锁相环路和锁相环路的应用 7.3频率合成原理 7.4实训:锁相环路性能测试

一、电压型和电流型变换器原理； 二、SPWM型变换器

1SR154400/1sR154-600 Diodes Rectifier diode 1SR154400/1sR154600 EXternal dimensions(Units: mm) （1)General purpose rectification （2) Surge absorption

Local or remote control Microprocessor controlled RS-232/RS-485 CAN Complete diode laser control Affordably priced and monitoring solution Air or water cooling( specify)

Fast response(tdon 3 FS, doff <6 Hs) Precise timing(Atdoff 800 ns) Patented free floating silicon technology Optimized low on-state and switching losses Very high EMI immunity Cosmic radiation withstand rating

8.1间接交流变流电路 8.2间接直流变流电路

7.1软开关的基本概念 7.2软开关电路的分类 7.3典型的软开关电路