Hi,
Please help me understand the active region for MOSFET from this section of my text book.
I am confused about the condition to keep MOSFET in active region that is used in this book.
Let's me explain about some notation used in the book:
We denote total variables with small letters and capital subscripts, average DC values using all capitals, and incremental values using all small letters.
Therefore:
vDS: Large-signal drain-source voltage
VDS: DC drain-source voltage
VGS: DC gate-source voltage
Vt: Threshold voltage of MOSFET
In the picture, it says that to maintain MOSFET in active region:
vDS > VDSmin = VGS - Vt
I am confused about this. Why not vDS > vGS - Vt?
Please help me understand the active region for MOSFET from this section of my text book.
I am confused about the condition to keep MOSFET in active region that is used in this book.
Let's me explain about some notation used in the book:
We denote total variables with small letters and capital subscripts, average DC values using all capitals, and incremental values using all small letters.
Therefore:
vDS: Large-signal drain-source voltage
VDS: DC drain-source voltage
VGS: DC gate-source voltage
Vt: Threshold voltage of MOSFET
In the picture, it says that to maintain MOSFET in active region:
vDS > VDSmin = VGS - Vt
I am confused about this. Why not vDS > vGS - Vt?
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