MOSFETs - Voltage Controlled Switches
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This video will introduce the user to MOSFETs by showing the the different types and how to use them. Including N Channel and P Channel, aswell as mentioning the differences between Enhancement type MOSFETs and depletion type MOSFETs.
Try the circuits yourself here:
N-Channel: everycircuit.com/circuit/5646546731008000
P-Channel: everycircuit.com/circuit/5880543226626048
BJTs: kzfaq.info/get/bejne/d7Kqn92Ku7G5loE.html
This video was produced partly using the excellent application Every Circuit.
everycircuit.com
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All circuitry in this video uses “conventional current flow” rather than “true current flow”.
#Electronics #Electrical #Engineering
@mariopanfilo7623 2 жыл бұрын
Great explanation. Question: At 3:01 - Why is the Voltage at the gate equal to the Voltage at the gate supply? Doesn't the 1 kOhm resistor before the gate pin decrease the voltage?
@electronicshandbook8788 2 жыл бұрын
Hi Mario, Great questions, the gate pin of a MOSFET in an ideal world draws no current at all, in practice it draws a few nanoamps. However because there is no current flowing through the 1kOhm resistor there is also no voltage drop across the resistor. This is because Ohms law teaches us that voltage is equal to current times Resistance and if there is no current and the resistance is fixed then there cannot be a voltage drop. I hope that makes sense!
@kabandajamir9844 2 жыл бұрын
So nice
@karthikvijay4237 2 жыл бұрын
BRO i am a new subscriber to your channel...I was inspired by this video about MOSFET because yesterday I tried this circuit for my project.. i have a question without 10k ohm my circuit was not able to work...why this happen...please reply to me bro
@electronicshandbook8788 2 жыл бұрын
Hi, Thanks for the great feedback, i'm glad to hear you enjoyed the content. The 10K ohm resistor is a pull-down resistor in the N-Channel circuit, or a pull-up resistor in the P-Channel Circuit. The purpose of a pull-down resistor is to help keep the transistor base pin low when the transistor should be off, and allows the small amount of current flowing from the supply to go somewhere. The pull-up resistor is the same but inverted, it helps ensure the transistor base pin is high when it should be. Pull-down/up resistors are used all over electronics and whilst not always strictly necessary, they are often recommended. I hope that helps
@karthikvijay4237 2 жыл бұрын
@@electronicshandbook8788 thanks bro