# #二极管的组成 The PN Junction is encapsulated, leading to two electrodes, which form the diode.
# #实物图片:
# #二极管分类 + point Contact Type: Small junction area, small junction capacitance, it allows a small current, the highest operating frequency high. + face Contact Type: Large junction area, large junction capacitance, it allows large current, the maximum operating frequency is low. + plane type: Knot area can be small, large, small working frequency high, large allowable current.
> Diode is a single wizard-pass, the existence of the junction capacitance is equivalent to a capacitor, the capacitance is to hinder the voltage change of the components, capacitance resistance to the capacitance of the capacitor to the alternating current, the resistance and frequency and capacitance are inversely proportional. For diodes, we hope that the greater the tolerance, that is, the smaller the capacitance, the lower the frequency, the greater the tolerance, the better one-way conductivity. Point contact shape due to small capacitance contact area, capacitance is small, then the tolerance will be large, so the frequency of response can be high without damaging unidirectional conductivity.
From for notes (Wiz)
The composition of the diode
