the explian and key concept part seems too ambigous with few key points, should include some hightlights for memeory
explian mosfet conditions
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Posted 4 months ago
Answer
The conditions for MOSFET operation
Solution
a
Cutoff Region: In this region, the MOSFET is off. The gate-source voltage VGS is less than the threshold voltage Vth. No current flows from drain to source (ID=0)
b
Triode Region (Linear Region): The MOSFET operates like a variable resistor. This occurs when VGS>Vth and VDS<VGS−Vth. The drain current ID is given by:
ID=k′(LW)[(VGS−Vth)VDS−2VDS2]
where k′ is the process transconductance parameter, and LW is the width-to-length ratio of the MOSFET
c
Saturation Region: The MOSFET is fully on, and the current is mostly independent of VDS. This occurs when VGS>Vth and VDS≥VGS−Vth. The drain current ID is given by:
ID=2k′(LW)(VGS−Vth)2
In this region, the MOSFET acts as a constant current source
Key Concept
MOSFET operating regions
Explanation
The MOSFET has three primary operating regions: cutoff, triode (linear), and saturation. Each region is defined by specific conditions on the gate-source voltage VGS and the drain-source voltage VDS.
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