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help with the elementary questions

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cdg021531

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hi all
I am a student from Hong Kong who currently studying EE
but i encountered some questions and want to seek some help from you all

1. A common source amplifier with enhancement load is shown. M2 behaves as a nonlinear resistive load. It is assumed that the input voltage vG exceeds the threshold voltage Vt, and both M1 and M2 operate in the saturation region. Using the iD-vDS curve of M1 provided,
Superimpose the load line by M2 on the iD-vDS curve, indicate the intersections on x, and y axis and mark the operating point defined by ID and VDS1.

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mishrashashi

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circuits are in saturation region. suppose W1=W2=W3=?
Apply Idd formula for saturation region.
Id= 1/2*unCosx*(W/L)(Vgs-Vt).
 

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