Question

Question 3. We have got an amazing Junction Field-Effect Transistor. Here it is. http://rghost.ru/45735262 (Sorry, I dunno how to make attachments). This JFET is included into circuit. Here. http://rghost.ru/45735308 . Assuming that IDSS=0.008A, VP=4V, R=2000Ω, and VS=8V, find the operating point of the circuit by evaluating vD and iD. And at what value of VS (in Volts) does the current through the JFET stabilize at IDSS? Maybe somebody knows it? :)

Answer 1

Ok, I have found iD and vd. But still can't solve last question.

Answer 2

Can u give the equations for iD & vD.

Answer 3

(vD-Vs)/R+iD=0
(vD-8)/2000+0.008(2*(vD/4)-(vD/4)^2)=0
vD = 1

iD = Idss ( 2 * (vD/Vp) - (vD/Vp)^2 ) = 0.0035

Answer 4

Oh, i have done it myself. :)

Answer 5

what's the equation for Vs?

Answer 6

I made it with lines.
iD = -0.0005*vD+0.01
It is crossing with axles in (0;0.01) and (20:0)
So my answer 20.

Answer 7

can you be more specific about how we calculate vs

Answer 8

It is very difficult to tell it in english cause it isn't my native language. Sorry(

Answer 9

Have you done all three pats of Q2 ??? can you help me for Q2? please

Answer 10

@sajid1 check this post for formula

Answer 11

maxsteel i don't know how to solve for vd i try it but ...

Answer 12

@sajid1 attaching you the screenshot

Answer 13

@maxsteel answer for Vth = +5V

Answer 14

vth=r2/(r1+r2))*v-r4/(r3+r4))*v
BRO u have same circuit just different values

Answer 15

its just
=+5 nt -5

Answer 16

u got it

Answer 17

maxsteel have u solved Q6P1?

Answer 18

ya post me u r 3rd question values bro i will help you out

Answer 19

The channel has a length of D=26m and noise is added in at the rate of 0.6Vm.

Answer 20

VOL=1V,VIL=2V,VIH=3V,VOH=4V. What is the minimum number of buffers required to connect between the digital links in order to ensure correct operation?

Answer 21

@ tistaroun what's the equation for Vs?

Answer 22

have anyone of u solved q5?
if yes could u plz tell how to solve