Hi again
http://i45.tinypic.com/1zqt2t4.jpg
Hope you guys can help me please. For those who know it should be easy.
This is the circuit in orcad, but the given values of resistors only include R7=100Ω, rs=600Ω.
Have to determine the resistor values(E-12):
Vcc=20V, Load resistance=100Ω, ouput voltage is to be +-100mV, Ie2=2mA, Ve1=5V, Vce1=3V, Ic1=1mA and R4 is equal to one tenth of R2. Vbe=0.7V.
Use approximate method.
I would like only clarification on R5 and Vb2 please. The rest of the resistors I have filled in but this might need adjustment if Vb2 is wrong.
What ive done is to say:
R5=Vo/Ie2=100mV/2mA=50Ω
Vb2=Vc1=Ve2+Vbe=0.1+0.7=0.8V.
Im assuming Vo is the output voltage but the +-100mv might mean that Vo needs to be 200mV. I cant find any other examples having a similar question to this. Using Boylestad and Floyd books. But nearly no examples to designing. And the worst part is the lecturer does not want to help me at all and unfortunately Im not understanding all of this so well (and I need all the marks I can get).
http://i45.tinypic.com/1zqt2t4.jpg
Hope you guys can help me please. For those who know it should be easy.
This is the circuit in orcad, but the given values of resistors only include R7=100Ω, rs=600Ω.
Have to determine the resistor values(E-12):
Vcc=20V, Load resistance=100Ω, ouput voltage is to be +-100mV, Ie2=2mA, Ve1=5V, Vce1=3V, Ic1=1mA and R4 is equal to one tenth of R2. Vbe=0.7V.
Use approximate method.
I would like only clarification on R5 and Vb2 please. The rest of the resistors I have filled in but this might need adjustment if Vb2 is wrong.
What ive done is to say:
R5=Vo/Ie2=100mV/2mA=50Ω
Vb2=Vc1=Ve2+Vbe=0.1+0.7=0.8V.
Im assuming Vo is the output voltage but the +-100mv might mean that Vo needs to be 200mV. I cant find any other examples having a similar question to this. Using Boylestad and Floyd books. But nearly no examples to designing. And the worst part is the lecturer does not want to help me at all and unfortunately Im not understanding all of this so well (and I need all the marks I can get).