Hi all
Just wondering could anyone help me with this circuit.
I am trying to work out values for Re and Rc but am confused.
i have worked out the other resistor values by
let Vg = Vcc/10 10/3 = 3.3v
let Vgs = vp/2 2/2=1v
Vs = 3.3 +1 =4.3v
let Id=Is= 1 mA
Rs= 4.3/1mA = 4.3K
let Vd = 2Vcc/3 = 2x10/3 = 6.66v
Rd= 10 6.6/1mA = 3.4K
R1 + R2 need to be as large as possible. R1 should be twice R2
so let R1= 2M so R2 = 1M
Also
JFET
Vp = 2 V
IDSS = 4mA
VA = 100 V
BJT
IC (rated) = 1 mA
b = 150 (b = beta)
VA = 100 V
Could someone tell me if i have worked out the values correctly and how to go about working out Re and Rc
Many thanks
steve
Just wondering could anyone help me with this circuit.
I am trying to work out values for Re and Rc but am confused.
i have worked out the other resistor values by
let Vg = Vcc/10 10/3 = 3.3v
let Vgs = vp/2 2/2=1v
Vs = 3.3 +1 =4.3v
let Id=Is= 1 mA
Rs= 4.3/1mA = 4.3K
let Vd = 2Vcc/3 = 2x10/3 = 6.66v
Rd= 10 6.6/1mA = 3.4K
R1 + R2 need to be as large as possible. R1 should be twice R2
so let R1= 2M so R2 = 1M
Also
JFET
Vp = 2 V
IDSS = 4mA
VA = 100 V
BJT
IC (rated) = 1 mA
b = 150 (b = beta)
VA = 100 V
Could someone tell me if i have worked out the values correctly and how to go about working out Re and Rc
Many thanks
steve
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