Here is my circuit and my givens, correct me where I'm wrong.
I have decided to split the BJT and FET for now in solving some of the things.
BJT
VC - 8.04vDC Vcc - (IC*RC) = 15 - (.012*580)
VB - 2.2vDC Vcc *(R1/(R1+R2)) = 15 * (1100/7500)
VE - 1.5vDC VB - VBE = 2.2 - ~.7
IC - 12mA IC ~ IE
IB - 2mA VB/R2 = 2.2/1100
IE - 12mA VE/RE = 1.5v/125
Rin(base) - 15000 Beta * RE = 120 * 125
The BJT individual gain is Beta = IC/IB = 12mA/2mA = 6?
FET
Idss - 78.8mA (gm0 * VGSoff)/2 = (.035 * 4.5) /2
Vg - ? (is it ground?)
Vgs - -0.75v
IS - 21.4mA VS/RS = .75/35
ID - 21.4mA ID ~ IS
VD - 7.296 VD = VDD - (ID * RD) = 15 - (21.4ma * 360) = 15 - 7.704
gm - 29mS gm0(1 - Vgs/Vgs(off)) = 35mS(1 - (-.75/-4.5)) = 35mS(1-.1667) = .035 * .8333
How am I doing? Then I have to factor in Rin(total) to get the actual gain? Thanks for reading!
I have decided to split the BJT and FET for now in solving some of the things.
BJT
VC - 8.04vDC Vcc - (IC*RC) = 15 - (.012*580)
VB - 2.2vDC Vcc *(R1/(R1+R2)) = 15 * (1100/7500)
VE - 1.5vDC VB - VBE = 2.2 - ~.7
IC - 12mA IC ~ IE
IB - 2mA VB/R2 = 2.2/1100
IE - 12mA VE/RE = 1.5v/125
Rin(base) - 15000 Beta * RE = 120 * 125
The BJT individual gain is Beta = IC/IB = 12mA/2mA = 6?
FET
Idss - 78.8mA (gm0 * VGSoff)/2 = (.035 * 4.5) /2
Vg - ? (is it ground?)
Vgs - -0.75v
IS - 21.4mA VS/RS = .75/35
ID - 21.4mA ID ~ IS
VD - 7.296 VD = VDD - (ID * RD) = 15 - (21.4ma * 360) = 15 - 7.704
gm - 29mS gm0(1 - Vgs/Vgs(off)) = 35mS(1 - (-.75/-4.5)) = 35mS(1-.1667) = .035 * .8333
How am I doing? Then I have to factor in Rin(total) to get the actual gain? Thanks for reading!