关式调制器 switch modulator: 开关调制器; 脉冲调制器active-switch modulator: 有源开关调制器filter-coupler-switch-modulator: 滤波耦合开关调制器hard switch modulator: 刚性调制器hard-switch modulator: 刚性开关调制器下载手机词典可随时随地查词查翻译