Are you asking and answering your question?
Hi Ratch
Not i'm trying to open your mine with question and answer !!
I understand what you mean, and know that you are wrong. It won't do any good to repeat the same thing again. You need to look at my message to Jeffrey Samual, and discuss the points I made in my reasoning.
Listen carefully ! I don't need to waste my time with some definitions ! because i know the correct term of this issue and i'm using my methods to design a circuit , if i want to teach someone the principles of operation of a transistor i'll tell that someone , about the fact of issue and then i'll tell that someone to don't pay attention to that fact in design process ! it is what i'm doing !
Did you ask yourself ever , that why we're studying electronics ? to just playing with paper and pen and just theorem ? or doing something in the real world ? i don't know how should i transfer my meaning to your mind , but i know i'm living in the real world ! and in this real world most of the times i'm designing many things without playing with definitions .
For my opinion you'd better to refer to the FvM's post in former page too !
I am referring to the threads where you "remembered" a concept of negative impedance in a transformer, and an input impedance calculation in a CE amplifier. Don't you remember asking about that?
Yes i can remember it exactly and i can remember the answer of the other expert members of this forum to you ! and i can remember many of famous textbooks that are references in famous universities of this world ! and i can remember that i didn't use that funny theorem until know and i didn't have any problem with my transformers without that negative impedance theorem until now .
I have a suggestion for you . i think you need to think more ! just think why you need to go to the university ? to learn ! why you need to learn ? to be able to use each thing that you've learned in the real world ! why you need to use them in real world ? to handle an aim .
It is enough that you think , what is the benefit of a thing that has not any benefit in the real world and in the practical issues ?
For example , consider that you have received a new project , what you'll do ? will you try to solve it on a piece of paper and play with theorem ? we are living in the real world not in pice of paper !
I've learned that we are learning to do everything in practice !
You can't tell me that my method is wrong ! because i know gang of peoples in this world with this method ! and after these days that i'm in electronics , i know exactly , i'm in electronics because i want use theorem to achieve a design method ! what is the benefit of things that you can't use them in practice ?
Clarification : we all know how a transistor does work but many of the things that are applied in a transistor are not useful in the real world ! hence we know them but we won't use them .
( when you use that concept in a design process ??!! never !! )
For my opinion : try to live in the real world , my friend ! ;-)
Regards !
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Hi Goldsmith,
at first, I see a contradiction in your sentence "When input resistance of a CE amplifier isn't important for me , i will select IR1 = 6ib and IR2 = 5ib".
Why do you consider the current Ib into this input resistance if it isn`t important for you?
Moreover, I am afraid there is a big misunderstanding on your side. The question is NOT if Ib can be neglected or not during the design of a transistor stage. That is a complete different problem
Of course, Ib is present and should not be neglected for calculating resistor values. But we speak about the question if Ib controls Ic (from the physical point of view).
And this has nothing to do with the existence of Ib. OK?
Hi dear LvW
Pardon me if i couldn't transfer my meaning as well .
My mean with neglecting ib was not for this issue ( the description of this thread ) my mean was we can neglect some of the facts in this world ! i wanted to tell that when a thing is available in fact , we can neglect it to simplify a process . but in fact that is available ! but we can neglect it because it's effect isn't important , really . i wanted to tell , that we should neglect some of the facts in this world to simplify everything . i've learned that we should simplify each thing as we can . am i right ?
at first, I see a contradiction in your sentence "When input resistance of a CE amplifier isn't important for me , i will select IR1 = 6ib and IR2 = 5ib".
Why do you consider the current Ib into this input resistance if it isn`t important for you?
Let me tell my meaning , accurately .
For example , consider please that we want design a CE amplifier which it's input impedance isn't important for us ( it can have each value ! but it's value isn't important for us) . but when we want have input impedance of 2 k ohms , we can't use the rule of thumb of 6ib and 5ib because we're looking for an special input resistance . hence values of R1 and R2 are pretty important for us .
if you precept me to show it with a circuit , i'll do it . ( for example you can tell me we need an amplifier with these specifications ...... and then i'll show how i'm design such a stage in real world i think it would be ok ,isn't it ? ) or if you want i can show my meaning with an example ( a random one ) from my side ?
I think thus all of the misunderstandings will be removed . may i know your idea please ?
Yours Sincerely
Goldsmith