Calculate Gate Source, Drain Current, and Source Voltage of a JFET

[DODGEVIPER13]

Homework Statement

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Homework Equations

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The Attempt at a Solution

So what I started with is Vg=(R2/(R1+R2))Vdd - 10 = -7 Volts this is incorrect though I was told it is -4 V what did I do

 

[DODGEVIPER13]

Theoretically after I solve for this I would get Kn and Id. Then I would set up an equation to find Vgs.

 

[CWatters]

The voltage across the potential divider R1+R2 is 20V. So the voltage across R2 is..

20 * R2/(R1+R2) = 6V

So the gate is 6V above the -10V rail which is -4V.

 

[DODGEVIPER13]

Thanks man

 

[rude man]

What equation were you given that includes k_a', W/L and K_a? These are not standard terms in a JFET model so you need to give us your equation(s).

 

[DODGEVIPER13]

Oh yah I got it all figured out man thanks just had the test too hope I did well