How to determine the three poles first?
The identification of the three pins on the MOS transistor symbol should focus on key points:
G-pole, needless to say, is relatively easy to recognize.
The S-pole, whether it is a P-channel or an N-channel, intersects two lines.
D-pole: Whether it is P-channel or N-channel, it is the side with separate leads.
After determining the polarity of the three legs, it is time to determine whether it is a P-channel or an N-channel (of course, you can also determine the type of channel first and then determine the polarity of the three legs):
Direction determination of parasitic diodes:
If the above method is not easy to remember, a simple recognition method is: (Imagine that the three discontinuous lines on the DS side are connected) Whether it is an N-channel or P-channel MOSFET, the arrow direction of the middle substrate and the arrow direction of the parasitic diode are always the same: either they all point from S to D, or they all point from D to S.
And their use, for example, on the laptop motherboard we face every day, MOS transistors have two main functions: switching and isolation. The slow up function often used in our SFP and PON modules is achieved through this feature
The above is a brief overview of MOS Tube Application, which can be a reference for everyone. Our company has a strong technical team and can provide professional technical services for customers. At present, our company has diversified products: intelligent onu, communication optical module, optical fiber module, sfp optical module, olt equipment, Ethernet switch and other network equipment. If you need, you can have a deep understanding.