A good starting point would be to remember the definition of alpha and beta.no idea how to start
I know about alpha beta.I know about the I/O characteristics curve and BJT models. but how to draw load line and calculate those from curves, give me hints.I dont want you to solve this for me.just give me some clueA good starting point would be to remember the definition of alpha and beta.
Alpha and beta are transistor parameters - independent on any application. Thus - there is no "load line" to be considered.I know about alpha beta.I know about the I/O characteristics curve and BJT models. but how to draw load line and calculate those from curves, give me hints.I dont want you to solve this for me.just give me some clue
Then perhaps the best place to start would be to retake the course where these are taught. Or to go back to the textbook where this is taught and reteach yourself these concepts.no idea how to start
It's debatable that you know about alpha and beta and characteristic curves and BJT models if you don't have a clue about where to start or think that there is any kind of a load line involved in this problem at all.I know about alpha beta.I know about the I/O characteristics curve and BJT models. but how to draw load line and calculate those from curves, give me hints.I dont want you to solve this for me.just give me some clue
It's debatable that you know about alpha and beta and characteristic curves and BJT models if you don't have a clue about where to start or think that there is any kind of a load line involved in this problem at all.
So let's take it from the basics.
Q1) What is the definition of the DC beta?
Q2) For this transistor, what is Ic under the conditions specified in part i)?
Q3) Given Q1 and Q2, what is the answer to part i)?
Q4) What is the definition of alpha?
Q5) What is the relationship between Ib, Ic, and Ie?
Q5) Given Q2, Q4, and Q5, what is the answer to part ii)?
I am reading my text book. I think this is a problem where you use Load Line and Q-point.1) answer: base to collector dc curent gain
2) answer: Ic= 1.4mA (from the curve)
3) answer: beta dc= Ic/Ib = (1.4mA/10uA)= 140
4) answer: Ie=Ib+Ic
5) answer: Ie= Ib+Ic= (1.4mA+10uA)= 1.41mA
alpha= Ic/Ie= 1.4mA/1.41mA= 0.992
Is it correct brother? I understand all the equations and procedure but I doubt about the ques 2 answer. How to determine Ic from the curve ?
Correct, but arguably not clearly stated. Simpler and clearer might be that β=Ic/Ib under DC conditions.1) answer: base to collector dc curent gain
These are all correct and you are reading the data off the graph just fine. Note that you didn't need the right hand curve at all. It's useful information, just not relevant to these particular questions.2) answer: Ic= 1.4mA (from the curve)
3) answer: beta dc= Ic/Ib = (1.4mA/10uA)= 140
4) answer: Ie=Ib+Ic
5) answer: Ie= Ib+Ic= (1.4mA+10uA)= 1.41mA
alpha= Ic/Ie= 1.4mA/1.41mA= 0.992
Is it correct brother? I understand all the equations and procedure but I doubt about the ques 2 answer. How to determine Ic from the curve ?
But a load line involves two different components or circuits that each have to satisfy particular voltage-current characteristics. There's no second component here. You have a transistor with specified operating conditions, thus you only need the voltage-current characteristic for those operating conditions.I am reading my text book. I think this is a problem where you use Load Line and Q-point.
Do you have any additional info? Vcc? Rc?
by Jake Hertz
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by Jake Hertz