How can i know Vds in advance before simulation?

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Understanding Vds is crucial for ensuring MOSFETs operate in the saturation region, as falling below Vdsat can lead to unintended linear operation. Calculating Vds can be done using circuit theory, particularly in configurations like a common source amplifier with a drain resistor. Clarity in the question is essential, as some participants found the initial inquiry confusing. Providing a specific circuit example may help in addressing the calculation of Vds more effectively. Engaging with additional resources can also enhance understanding of MOSFET operation in different configurations.
Tesla Gwon
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i think this question is very important.
We must know Vds to make MOSFETs in saturation region.
if not, there would always be possibilities that a transistor falls in a linear region as Vds is lower than Vdsat.

Of course, i can calculate Vds in a CS AMP with a drain resistor.
I mean, in the other configurations, we should also know Vds.

How can i calculate it?
 
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Well you need to use your circuit theory knowledge and solve for Vds.
Also you can show as a circuit that you have a problem with.
 

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