Hi What I mean is the equation(The one highlighted in red) that is derive from the SS model.If you are asking where the SS model itself comes from, you need to start with the equation for the large signal model (including the body effect) and then take the partial derivatives with respect to the various voltages and then convert that into the equivalent circuit.
Who says Vout is negative? Vout is whatever Vout is.Hi What I mean is the equation(The one highlighted in red) that is derive from the SS model.
Like why is Vbs1 = - Vout ? ( why is Vout negative? )
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