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## Homework Statement

Just started learning about transistors, and I am having difficulty doing this problem.

The transistor in the circuit has [tex]k_n ^'=0.5mA/V^2, V_t=0.5 V, \lambda =0.[/tex]

Show that operation at the edge of saturation is obtained when the following condition is satisfied

[tex](\frac{W}{L})R_D=1.5 kΩ[/tex]

## The Attempt at a Solution

As far as I know, if it is operating in on the edge of saturation, then

[tex]\frac{1}{2}k_m ^'(\frac{W}{L})v_{OV}[/tex]

However, when I manipulate this equation, I am unable to get to [tex](\frac{W}{L})R_D=1.5 kΩ[/tex]

Can anyone provide me some guidance on this?