Single pole double throw switch ( spdt ) mainly complete the conversion of the signal between difference channels , the control element in common use is pin diode and gaas mesfet 單刀雙擲開(kāi)關(guān)( spdt )主要用來(lái)完成信號(hào)在不同信道間的轉(zhuǎn)換,其常用的控制器件有pin管和gaasmesfet兩種。