Hey Guys, I've been stuck on a BJT problem for a very long time, and I can't figure out what I am doing wrong. The Image is attached. In the image, I personally added in the Vo1 and the Vo2. Also, β=100
For the problem, I need to find the operating point, and I need to find the region that the transistor is in.
My work:
I first found an expression for Ic and Ib, and combined them together through Ic = βIb.
I found that Ic = (15-Vo1)/Rc
I found that Ib = (Vs-0.6)/Rb
Then, (15-Vo1)/Rc = β(Vs-0.6)/Rb
And I solved for an equation for Vo1 in terms of Vs.
I then did the same for Ie. Where Ie = (β+1)Ib.
And I came up with another equation for Vo2
I then took the difference Vo = Vo1 - Vo2, to find a Vo in terms of Vs. And the operation point (which i think is the same as the quiescent point), would have a Vo at (15-0.2)/2 which is 7.4V. At this point, I solved for a corresponding Vs.
I then showed that this transistor is saturated (which i believe is what they mean when they ask for the region), because it is passed the Vs point where Vce = 0.2.
Am I going about this correctly? Please help. When i do this, I find that the FA curve is between a very small range of values which doesnt seem correct to me. Thank you!
For the problem, I need to find the operating point, and I need to find the region that the transistor is in.
My work:
I first found an expression for Ic and Ib, and combined them together through Ic = βIb.
I found that Ic = (15-Vo1)/Rc
I found that Ib = (Vs-0.6)/Rb
Then, (15-Vo1)/Rc = β(Vs-0.6)/Rb
And I solved for an equation for Vo1 in terms of Vs.
I then did the same for Ie. Where Ie = (β+1)Ib.
And I came up with another equation for Vo2
I then took the difference Vo = Vo1 - Vo2, to find a Vo in terms of Vs. And the operation point (which i think is the same as the quiescent point), would have a Vo at (15-0.2)/2 which is 7.4V. At this point, I solved for a corresponding Vs.
I then showed that this transistor is saturated (which i believe is what they mean when they ask for the region), because it is passed the Vs point where Vce = 0.2.
Am I going about this correctly? Please help. When i do this, I find that the FA curve is between a very small range of values which doesnt seem correct to me. Thank you!
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