Crystal diode connection materials are divided into germanium diode and silicon diode
Tube, gallium arsenide diode. According to different structures, it can be divided into points
Contact diode and surface contact diodes. By purpose
There are rectifier diode, detector diode, varactor diode
Tubes, Zener diode, Switching diode, LED
Tube and so on.
(1) Rectifier diode
Rectifier diode are mainly used in rectifier circuits, that is, to convert alternating current
Pulsating direct current. Rectifier diode are all surface junction type, so
The large junction capacitance makes its operating frequency lower. Generally below 3kHZ
under
(2) Detector diode
The main function of the detector diode is to remove the low frequency signal in the high frequency signal.
Number check out. Their structure is point contact type. Its junction capacitance is relatively
Small, high working frequency, generally made of germanium materials.