What is the Threshold Voltage in the MOS Transistors

Please Note that the mentioned description is not the actual operation of the device. It is just a way to remember the concept .

In this chapter, we will not take the help of electronic symbols, instead of that, we will relate this phenomenon with a very common example from our daily life.

To understand the concept of threshold voltage, Lets See the following Image .

Image Threshold

An Example of theshold

Now in the diagram –

We have a tap fitted tank. the water can be filled inside the tank from the top of the tank, and the water can be taken out from the tap.

Now, The water can not be taken out from the tap until the water level touches the tap level

Lets relate the amount of required water to get the tap level is the threshold voltage and the amount of water taken out from the tap is the output voltage. The output water from the tank will not be equal to the incoming water, It will always be less than the threshold amount of water

Summary : The Threshold voltage is the critical voltage point, after this voltage the actual operation of MOS Starts the output voltage will be always less than the threshold voltage in the total applied voltage.

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